Auto Parts That Start With D

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Dash Accent

A Dash Accent is an accessory that’s used to decorate the dashboard of a vehicle and make it more unique.

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Dash Bar

Dash bars or dash grab bars are steel bars inside vehicle cabins that help passengers hold on when off-roading. Unlike conventional passenger grab handles, dash bars are made from durable steel, which allows the passenger to hold on securely without fear of the part breaking. Dash bars can come in various lengths and can be mounted overhead or in front of a passenger. The bars can even be covered in leather to help the passenger grip.

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Car Grab Handle

Dash Bolt

Dash bolts are threaded fasteners that secure the dashboard to the central console of your vehicle. They vary in type, shape, and size between models, so bolts that fit the dash of a specific car or truck might be incompatible with a different machine. All dash bolts are strong and sturdy, usually covered in a protective coat that prevents corrosion and damage. They can withstand multiple removals and reinstallations without losing their bright colors.

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Dash Camera

A Dash Camera, also known as a dashboard camera or dashcam, is a camera that’s typically mounted on a dashboard. This camera is designed to record footage while the vehicle is on the road. These recordings can be used later on as evidence in case the vehicle driver gets involved in an accident. Some dash cams also come equipped with a parking feature that acts as a surveillance system for the vehicle while it’s parked, discouraging car thieves and burglars.

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Security Alarm Systems

Dash Cover

Dash covers are essentially the exposed part of your vehicle’s dashboard. Dash covers are typically made from materials like ABS plastic and can come in a variety of colors. The dash cover is meant to protect your vehicle’s plastic dashboard components from UV rays, which can cause discoloration and cracking. Moreover, dash covers are typically dark so that they don’t cause glare, which can make it difficult to see out of your windshield in bright sunlight.

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Dash Display

The dash display is a car interior part with several vital gauges like the engine coolant temperature gauge, speedometer, and oil pressure gauge. This part is for upgrading the dash display or replacing a faulty display. The dash display is mounted on the dashboard behind the steering wheel and usually has lights to illuminate the display in the dark. You rely on the dash display to show critical information about your car while driving.

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Accessories

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Dash Display Switch

The Dash Display Switch is a switch for a vehicle’s dashboard, which is where the clocks, gauges, and control panel can be found. The switch allows the driver to easily operate some of their vehicle’s systems, such as the lights, air conditioning, heating, and radio. Each system has its own switch, with a symbol printed or engraved onto the switch face to indicate which one it corresponds to. Most modern vehicles follow the standard size of 37.5mm by 21.2mm for switch holes, but this can still vary depending on your vehicle’s year, make, and model.

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Dash Lamp Kit

A dash lamp kit contains various electrical fittings made for specific vehicle functions, such as lights, washers, and more.

All vehicles have dash lights or telltale lights that alert the driver of an existing condition or issue. When the ignition is turned on, these lights also turn on as part of a self-test.

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Warning Lights

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Dash Organizer

A Dash Organizer is a simple storage solution that keeps small items in place while driving, including house keys, coins, phones, and sunglasses, among others.

Most dash organizers have an adhesive backing that sticks onto the dashboard surface. These organizers typically don’t require drilling and using other tools.

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Tips for Keeping Your Glove Compartment Clutter-Free

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Dash Panel

The dash panel displays the instrumentation and controls for the vehicle’s operation. These panels vary in design and complexity, but they often include the speedometer, tachometer, fuel gauge, and warning lights. They’re located inside the cabin below the windshield and in front of the driver and front passenger.

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Dash Panel Overlay

Dash Panel Overlays are panels applied on top of a vehicle’s dashboard. The vehicle-specific overlays are typically installed around the gauges and dash controls, improving their overall look and feel. These overlays are typically made from polished aluminum.

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Dash Pod

Dash pods are pieces of interior or cabin trim that are specifically designed to hold gauges and instruments. Dash pods can be mounted on the middle of your dashboard, on your vehicle’s A-pillar, or adjacent to your vehicle’s gauge cluster. Putting a dash pod in your cabin can allow you to add additional gauges without disrupting your cabin’s uniform look.

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Dash Trim

The Dash Trim refers to decorative fittings for your vehicle’s dashboard. It might be needed to personalize the vehicle or repair damaged and worn-out dash trim. The dash trim attaches to the dashboard and adds a personal touch to your vehicle interior. The dashboard can use the dash trim to help your vehicle stand out more from the baseline.

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Dashboard Retainer

The Dashboard Retainer is a small component specifically designed for fitting the dashboard in place. Also called snap-fit clips, dashboard retainers can vary in size, shape, color, and material, but they’re typically made of durable metal or plastic. They can also secure lightweight trim panels in place, such as interior pillar covers, exterior tailgate trims, and dashboard cover panels. They typically break when the trim is removed, but they’re relatively cheap and easy to replace.

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Daytime Running Light

Daytime Running Lights (DRLs) are a set of lights that include the front parking lights, separate DRL lamps, and headlights. On some vehicles, these lights turn on when the engine starts. On others, these lights turn on with a delayed operation until a sensor detects that the vehicle has started to move.

Most factory daytime running lights operate headlights with a reduced intensity. It’s still advisable to turn on the headlights as usual when driving at night.

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Daytime Running Light Bulb

A daytime running light bulb is responsible for creating the light inside the vehicle’s daytime running light. It’s installed on a vehicle’s front and typically illuminates when the vehicle is started, regardless of whether or not the vehicle’s headlights are activated. Unlike the vehicle’s headlights, daytime running lights aren’t meant to illuminate the vehicle’s surroundings. Instead, they’re meant to improve the vehicle’s visibility for other road users. Daytime running lights can use halogen or LED bulbs.

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Daytime Running Light Module

The Daytime Running Light Module, or DRL Module, is what controls the headlights and daytime running lights. It makes adjustments according to the light levels outside the vehicle. The DRL module improves the overall longevity of the headlight bulbs by activating DRL and disabling the headlights when the sun is out. Conversely, DRL is deactivated and the headlights are activated when it’s dark.

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Daytime Running Light Socket

The daytime running light socket is an electric socket for low-wattage lights that improve the vehicle’s visibility in low ambient light conditions. This part might be needed if you’re customizing your car with daytime running lights or replacing faulty ones. Daytime running light sockets are located near the headlights and connect the daytime running lights to the electrical system. The daytime running light relies on these sockets for mounting and power.

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Daytime Running Light Switch

The Daytime Running Light Switch is the switch for a vehicle’s daytime running lights. While regular headlights are manually turned on, daytime running lights are low-intensity headlights that automatically turn on when you drive your car. They aren’t as bright as headlights, but they’re generally brighter than parking lights. They’re enough to help make vehicles more visible during daylight hours without causing distracting glare. Daytime running lights are a common feature in modern vehicles.

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Deck Lid Lock

A deck lid lock is a locking mechanism for a vehicle’s rear trunk. Deck lids are a term used to refer to trunk lids in vintage vehicles. The deck lid lock uses a hook or latch to prevent the trunk from opening. Deck lid locks are much simpler than modern trunk locks since they’re entirely analog and rely on the key’s turning motion to lock or unlock the trunk. Over time, the deck lid lock might fail to close or open properly, which can warrant getting a replacement.

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Deck Lid Release Solenoid

The deck lid release solenoid is a part that controls the electronic latch for the deck lid (better known as the trunk lid). This part might be needed if the current or stock solenoid develops an issue, such as not responding to the command to release the deck lid. The deck lid release solenoid is usually located near the deck lid latch and connected by wires. The trunk relies on the deck lid release solenoid to open the trunk lid when it receives the appropriate signal, enabling access to the storage space.

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Deck Lid Release Switch

The Deck Lid Release Switch is used to release the trunk lid latch to open the tailgate. Also known as a trunk lid release switch, it’s usually made from durable plastic that protects the actuator from damage. Most switches are easy to install, with a plug-and-play system that doesn’t require any additional tools. Deck lid release switches come in different shapes and sizes, so you’ll need to find one that fits your vehicle’s hole diameter.

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Deck Lid Seal

The Deck Lid Seal is a strip of weather seal that fits on the deck lid of your vehicle’s trunk. It prevents dirt and water from leaking into the trunk by wrapping around the metal whenever the trunk closes. Deck lid seals also prevent metal-on-metal contact and possible damage when the trunk closes. They’re made of rubber material and come in various shapes and sizes to fit different vehicles.

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Air Conditioning and Heating

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Defrost Duct

The Defrost Duct is a part that raises the temperature of the windshield or rear window glass to remove frost when it’s cold outside. This part might be needed if you have a faulty or missing defrost duct. Defrost ducts are mounted under the window glass that needs their warmth. The windshield and rear window glass need the defrost ducts to help keep them clear during winter.

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Defroster Hose

Defroster Hose

A Defroster Hose is a type of flexible hose used in the heating, ventilation, and air conditioning (HVAC) system. The hose connects to the defroster vents located near the windshield, ensuring effective airflow.

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Air Conditioning and Heating

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Defroster Switch

The Defroster Switch opens the electrical circuit to the compressor to stop refrigerant circulation. This thermostat switch activates when the thermostat detects that the temperature is near freezing.

The defroster switch is also referred to as the thermo switch or icing switch.

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Air Conditioning and Heating

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Detail Brush

A Detail Brush is a tool that’s used to clean dust, dirt, and debris that’s gathered in hard-to-reach places, such as the air vents of a vehicle. They can also be used to clean the exterior of a vehicle, scrubbing away dirt from the wheel spokes, the emblem in front of the car, and the grilles. These brushes are known for being tough without being abrasive.

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DIY

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Detailing Kit

A car Detailing Kit is a comprehensive set of products and tools designed to clean, protect, and enhance the appearance of a vehicle. Some kits include a shampoo, wheel cleaner, tire gloss gel, wax, dashboard, glass cleaner, and microfiber cloths.

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DIY

Door Hinge PinHow to Detail Your Car’s Exterior: Get a Showroom Shine with These Key Detailing Tips

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Detail Brush

Diagnostic Tool

The Diagnostic Tool, also known as the OBD (on-board diagnostics) tool, is a device that connects to the vehicle computer to determine electrical and mechanical faults in a vehicle. It retrieves the stored diagnostic trouble codes, which help drivers identify which vehicle system or component may require diagnosis and repair.

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Maintenance

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Diaphragm Position Sensor

The diaphragm position sensor monitors the pressure and position of the brake booster diaphragm.

A damaged diaphragm position sensor can result in several issues, including poor braking performance and a disabled eco start/stop function for some vehicles.

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Diesel Emission Fluid (DEF) Heater

Diesel vehicles have diesel emission fluid (DEF) injected into the exhaust before the catalytic converter to help reduce emissions. A diesel emission fluid (DEF) heater prevents DEF fluid from freezing during winter. Once the vehicle is started, the DEF heater will quickly turn the fluid back to liquid to allow it to flow through the line and DEF pump. A malfunctioning DEF heater can cause your vehicle to trigger limp mode or have performance issues because of the effects of having no emission fluid.

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Exhaust

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Diesel Emission Fluid (DEF) Tank

The Diesel Emission Fluid (DEF) Tank is a container that stores DEF, which is a type of fluid that’s injected into a diesel engine’s exhaust stream to help reduce harmful emissions.

A typical DEF tank can hold up to five gallons of DEF fluid. A heater prevents DEF from freezing under extremely cold temperatures, while a pump and lines work together to transfer DEF to the exhaust system. An injector nozzle sprays the right amount of fluid, which is determined by the engine control module.

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Exhaust System

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Diesel Emissions Fluid (DEF) Cap

The diesel emissions fluid (DEF) cap is a secure, leak-proof part that seals the DEF system. This part might be needed if the existing or stock DEF cap disappeared, wore out, or became loose. The DEF cap is found on the vehicle’s DEF tank filler neck and stands out because of its blue color. The DEF tank needs this part to stop contaminants from entering the DEF system and to prevent DEF fluid leaks.

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What Happens If You Run Out Of Diesel Exhaust Fluid?

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Diesel Emissions Fluid (DEF) Hose

The Diesel Emissions Fluid (DEF) Hose is made to disperse high-purity diesel exhaust fluid (DEF) as it reduces nitrogen oxide levels in a diesel vehicle’s exhaust emissions. This in turn helps the diesel vehicle meet stricter emissions standards set by the government. Manufacturers cure this hose with peroxide to reduce contamination and improve extraction levels. The hose is flexible and easy to install inside a diesel engine. It’s enforced with textile braids.

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Exhaust

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Diesel Emissions Fluid (DEF) Injector

The Diesel Emissions Fluid (DEF) Injector is an emission control component that vaporizes and decomposes harmful gasses, such as nitrogen oxide, into nitrogen and water. It also ensures the exact amount of DEF is injected into the exhaust system.

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What Causes Your DEF Warning Light to Switch On?

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Diesel Emissions Fluid (DEF) Module

A Diesel Emissions Fluid (DEF) Module, otherwise known as the DEF injector, is one of the three major components in the Selective Catalytic Reduction (SCR) system, alongside the DEF tank assembly and SCR catalyst. It helps reduce harmful nitrogen oxide (NOx) emissions generated by diesel engines by periodically injecting DEF into the exhaust.

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Exhaust System

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Diesel Emissions Fluid (DEF) Pump

The Diesel Emissions Fluid (DEF) Pump pushes DEF into the exhaust system where nitrogen oxide is converted to nitrogen, water, and carbon dioxide. DEF is a chemical that’s made up of deionized water and urea. It converts harmful emissions into safe, breathable air.

The Diesel Emissions Fluid (DEF) Pump is connected to the vehicle’s exhaust system. It is typically located near the DEF storage tank, which may be found in the trunk, the engine compartment, and occasionally, the passenger space.

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Exhaust System

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Diesel Exhaust Fluid

Diesel exhaust fluid is a colorless, odorless, and non-toxic liquid used as a nitrogen fertilizer to reduce NOx exhaust emissions. It’s made from deionized water and a pure form of urea to help turn NOx into water and nitrogen.

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Maintenance

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Diesel Exhaust Particulate Sensor

The Diesel Exhaust Particulate Sensor monitors the diesel particulate filter to minimize emissions. Together with the filter, it reduces particle emissions by approximately 99%, preventing the accumulation and release of soot into the atmosphere. The sensor is typically installed downstream of the diesel particulate filter.

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Diesel Fuel Injector Nozzle

The diesel fuel injector nozzle is a part that sprays the required amount of diesel into one of the engine’s cylinder bores. This part might be needed if your vehicle has engine performance issues caused by clogged or faulty nozzles, such as uneven idling or misfires. Inside the combustion chamber, diesel fuel injector nozzles contribute to the engine’s power and fuel efficiency. The engine needs diesel fuel injector nozzles to create the right air-fuel mixture.

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Diesel Glow Plug Controller

The Diesel Glow Plug Controller is the control unit that operates a diesel engine’s glow plug. A glow plug is an electric heater that raises the air temperature inside the engine cylinder to avoid cold starts. Most controllers work by requesting information from the powertrain control module (PCM), such as glow requests, engine speed, and coolant temperature. Using this data, the control unit turns the glow plug on until the engine temperature is warm enough.

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Diesel Glow Plug Relay

The diesel glow plug relay is the component that sends power to your engine’s glow plugs. Like any relay, diesel glow plug relays are electronically controlled switches. This relay is typically activated during the engine start-up since glow plugs need to heat the combustion chamber to facilitate proper combustion in a diesel engine. The glow plug relay is designed to send power to the glow plugs for a few seconds. If the glow plug relay malfunctions, then the engine’s glow plug functionality will also suffer.

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Diesel Glow Plug Relay Connector

The Diesel Glow Plug Relay Connector is a part that allows the glow plug relay to connect to the diesel vehicle’s wire harness. This part might be required if you have ignition and engine performance issues after installing a new wire harness or glow plug relay. Glow plug relay connectors are found where the glow plug relay and wiring harness meet, and their outer coverings help protect the connection points. Glow plugs run on the electricity that flows from the glow plug relay connector to the relay itself and its connected light.

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Diesel Glow Plug Switch

The Diesel Glow Plug Switch helps activate the glow plug, the heating element that preheats the combustion chamber for efficient fuel combustion. Also known as the glow plug control unit, it uses a relay to switch the current for the glow plugs, effectively turning them on and off. When a glow plug switch malfunctions, it can prevent the vehicle from starting, so it’s important to replace it as soon as possible.

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Diesel Injection Pump

A Diesel Injection Pump is a high-pressure pump assembly with lines leading to each injector. It supplies fuel under pressure (15,000 pounds per square inch) to the injectors in each cylinder.

The pump is usually driven by a belt or chain linked to the crankshaft. For gasoline engines, the diesel injection pumps deliver the correct amount of fuel at the right time for each cylinder.

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Fuel System 101: Common Types of Fuel and Basic Parts

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Diesel Injector

A diesel injector delivers a precise amount of atomized fuel into each cylinder when the piston is at the top of the cylinder, which is the point where the air has been compressed. Diesel fuel is only introduced when the piston has compressed the air. The diesel automatically combusts as soon as it’s introduced into the combustion chamber The diesel injector’s ability to distribute fuel evenly in the combustion chamber is critical to providing the most power, allowing the engine to run as smoothly and efficiently as possible.

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Diesel Injector Line

The diesel injector line is a part that transports pressurized fuel from the high-pressure fuel pump to the diesel engine. This part might be needed if the stock or current lines have worn out or developed issues like leaks. Diesel injector lines are located between the fuel pump and the diesel fuel injectors, and they help ensure the fuel stays under pressure. The diesel injectors rely on the lines to deliver fuel quickly and efficiently.

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Diesel Injector Nozzle

The Diesel Injector Nozzle is a nozzle or sprayer through which fuel is injected into a diesel engine. Its main function is to convert fuel into diesel vapors and spray it into the combustion chamber. Diesel injector nozzles are usually made of durable stainless steel for resistance to corrosion and high temperatures. Because they’re critical to the performance and emissions of diesel engines, diesel injector nozzles are one of the most important parts of the engine.

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Diesel Injector Plug

The Diesel Injector Plug is a return plug attached to the end injector in a diesel fuel system. Two diesel injector plugs are needed per engine, and they usually require clamps that will hold the plug in place. These injector plugs are usually an inch long, and they can be sold individually or as part of a kit.

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Diesel Particulate Filter

A Diesel Particulate Filter, abbreviated as DPF, is a filter installed in modern diesel vehicles to trap particulate matter. It serves as a form of exhaust aftertreatment and is primarily utilized by manufacturers to reduce the soot and ash in their diesel vehicles’ exhaust. The honeycomb-shaped structure inside the filter is typically made of ceramic substrate, which helps prevent harmful emissions from escaping the exhaust system while also reducing black smoke during acceleration.

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Exhaust

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Diesel Particulate Filter Pressure Sensor

A Diesel Particulate Filter (DPF) Pressure Sensor monitors the exhaust back pressure in a diesel engine.

The powertrain control module (PCM) uses the input from the DPF pressure sensor to determine whether or not a regeneration process is needed to remove diesel particulate matter and soot from the system.

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Diesel Vacuum Pump

The Diesel Vacuum Pump is a component in a vehicle’s fuel system that maintains a stable and sufficient vacuum. Diesel engines require vacuum pumps because diesel engines fon’t have throttle valves for generating adequate pressure differences throughout the system.

Many vehicles use the vacuum created by the pump to operate pneumatic components and the brake boosters. The vacuum pump is thus essential for a diesel vehicle to run exhaust-gas recirculation valves, secondary air valves, and intake manifold switches.

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Differential

The differential distributes power from the engine to the drive wheels. It helps drivers maneuver and drive on slippery terrain, such as icy, muddy, and wet roads. The differential is usually in the axle assembly connected to the vehicle’s driveshaft.

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Differential Bearing

The Differential Bearing lets the differential case spin freely inside the carrier. Differential bearings generally rotate in all gears.

Shims or threaded adjusting nuts are used to place a preload on differential bearings, which prevent them from wobbling inside the carrier.

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Differential Bearing and Race Set

The Differential Bearing and Race Set is a set that contains the differential bearing and bearing race. Also known as a pinion bearing, the differential bearing helps the smallest gears in the differential function efficiently. Depending on your vehicle’s year, make, and model, differential bearings and bearing races can come in different sizes, so it’s important to find the kit that’s compatible with your car. You’ll also need grease to lubricate the bearing and race when installing.

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Differential Bearing and Seal Kit

The Differential Bearing and Seal Kit is a set that includes various differential bearings and seals that fit onto a vehicle’s differential. The bearings in the set work to increase the differential’s efficiency by keeping the small gears in the differential turning smoothly. The differential seals keep the differential fluid from leaking out of the differential past the pinion shaft. Various kits include different types of bearings and seals depending on the vehicle they’re compatible with.

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Differential Bearing Retainer Stud Kit

The Differential Bearing Retainer Stud Kit contains various stud fasteners for attaching the differential bearing retainer to the differential. This stud kit might be needed to replace damaged or worn studs that cause issues like loosening the differential bearing retainer. Stud kits have multiple studs of varying lengths. The differential needs the studs in the kit to keep the retainer firmly attached and ensure the bearings move in the correct alignment.

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Bad Differential: Symptoms, Replacement Cost, & FAQ

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Differential Bushing

The differential bushing is a component that sits between the differential housing and other components. Like the many subframe bushings in a vehicle, the differential bushing acts like a cushion that reduces vibration and noise. The bushing also keeps components aligned. When a bushing wears out, you’re probably going to hear clunking noises. When ignored, a worn-out bushing can increase wear on other components.

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Differential Carrier

Differential Carriers are specifically engineered to support the differential gears and bearings. They fit different gear ratios, which are needed for various tire sizes and vehicle applications.

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Differential Carrier Bearing

Differential Carrier Bearings are responsible for keeping the axles and driveshaft secure and in place, minimizing vibration and the potential damage that comes with it being loose.

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Differential Carrier Case

The Differential Carrier Case is a part of the differential carrier assembly that houses the differential carrier. It has a ring gear that rotates around the differential axis. The case allows the differential carrier to control the wheels and turn them at different speeds.

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Differential Clutch

A Differential Clutch helps control the power transfer from the drive shaft to the wheels. It is connected to a differential to provide smoother transitions between gears when shifting. It reduces wear on the transmission system by decreasing the drag caused by the gears.

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What Is Differential Gear Oil: Uses, Costs, and Other Related FAQs

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Differential Clutch Guide

Differential Control Module

The Differential Control Module controls the various electrical systems related to the differential. It transmits power from the engine to the axle, moving the wheels and allowing them to move at speeds independent from one another.

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Differential Cover

The differential cover is a metal shield that protects that differential’s gears. The cover protects the gears from dirt, water, rocks, and even protruding obstacles encountered when off-roading. When the differential cover is damaged, the gear lubricant can leak, which can expose the differential gear and cause issues such as overheating and contamination. The cover also helps dissipate heat from the differential gears.

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Differential Cover Bolt

The Differential Cover Bolt is a fastener that secures the diff cover to the rear-end housing. This part might be needed to replace old or damaged bolts that have gotten stuck, become loose, or broken off. Differential cover bolts are screwed into the vehicle’s differential and keep the diff cover firmly attached. The differential cover needs its bolts to minimize vibrations and prevent the cover from falling off the differential.

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Differential Cover Gasket

The Differential Cover Gasket is a seal that prevents differential fluid from leaking while keeping contaminants from entering the differential cover. Differential cover gaskets come in different shapes and sizes, so you’ll have to find one that fits your vehicle. Unlike room temperature vulcanizing (RTV) sealant, these gaskets are easy to remove. They provide a tight seal across the entire cover, including imperfect surfaces. They also don’t require curing, making them easy to install.

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Differential Crush Sleeve

The Differential Crush Sleeve maintains a certain amount of force against the outer and inner pinion bearings inside a vehicle’s bearing cups. Crush sleeves get their name from the fact that they’re designed to be crushed during differential assembly to create the adequate amount of resistance. They’re designed to be simple and easy to use. However, crush sleeves are one-time use and must be discarded if they need to be replaced.

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Bad Pinion Seal Symptoms

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Differential Dynamic Dampener

A Differential Dynamic Dampener is a component in the drivetrain that reduces vibration and noise generated by the differential or a misaligned/imbalanced axle to improve driving experience and provide a smoother ride.

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Bad Differential: Symptoms, Replacement Cost, & FAQ

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Differential End Yoke

A Differential End Yoke is a part of the driveline system that connects the driveshaft to either the axle or the transmission output. It plays a role in transferring power smoothly between the connected parts. There are typically two types: the outside and inside snap ring style end yoke.

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Rear Differential Leaks: Symptoms, Causes, and What to Do

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Differential Filter

The Differential Filter is designed to prolong the lifespan of a differential. The differential itself is the component that’s responsible for transferring and manipulating engine torque that’s sent to the drive wheels. It can typically be found next to the transmission in the transaxle.

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Differential Gasket

The differential gasket is a gasket that seals the gap between the differential and the differential cover. The differential gasket is an essential component for protecting the differential gears since it keeps the gear fluid inside, which is important for lubrication and cooling. Just like any gasket in a vehicle, the differential gasket prevents fluid inside the differential from leaking out. It also prevents outside contaminants such as water or dirt from entering the differential.

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Differential Gear Set

The Differential Gear Set is a collection of differential gears that enable the wheels of your car or truck to turn at different speeds. This part replaces old, damaged, or worn-out differential gears that cause issues like slow switching between gears. The contents of the differential gear go into your vehicle’s differential gearbox, and the gears help the vehicle switch to the speed best suited for the job. The transmission relies on the differential gear set for smooth transitions during gear changes.

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What Is Differential Gear Oil: Uses, Costs, and Other Related FAQs

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Differential Housing Bracket

The Differential Housing Bracket is a length of metal that holds the differential housing, which contains the differential transmission gear. The bracket makes it easier for the differential housing and transmission gear to attach to the rest of the transmission system. The differential gear can then transmit the engine’s torque to the wheels at different speeds as the vehicle turns. It looks like a metal arm with mounting points at both ends.

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Differential Installation Kit

A Differential Installation Kit contains the basic parts required to rebuild a differential, including pinion and carrier bearings, pinion seals, O-rings, pinion nuts, and crush sleeves.

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Differential Lock Actuator

A Differential Lock Actuator is a component commonly found in off-road vehicles to ensure mobility when driving in difficult terrains. The actuator locks the differential and directs power to the wheel with the most grip to prevent the wheels on the same axle from spinning independently.

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Bad Differential: Symptoms, Replacement Cost, & FAQ

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Differential Lock Plate

The Differential Lock Plate is a component of the differential lock. It secures the differential in place and ensures that all the wheels on the axle move at the same speed. This is important because this ensures power is equally spread out through all four wheels – a necessity when it comes to off-road driving.

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Differential Locker

The Differential Locker, also known as a locking differential, is a component of a vehicle’s drivetrain system that can lock the axles together. During turns, the differential locker operates like an open differential, allowing the wheels to rotate at different speeds. When traction is needed, however, it locks the axles mechanically by forcing the wheels to rotate at the same speed. Differential lockers are especially useful when off-roading, and they can be manual or automatic.

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Differential Mount

The Differential Mount is the component responsible for securing the chassis in place, providing the differential with support and stability. This allows the differential to maintain proper alignment and ensures the various components of the drivetrain work as intended.

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Differential Oil Flow Check Valve

The differential oil flow check valve is a check valve that allows oil to freely flow in one direction but blocks oil flow in the opposite direction. This valve prevents oil backflow that can damage pumps and compressors. Check valves use a disc or ball that closes the valve opening when the fluid flow reverses, but the ball moves away from the seat when the fluid flows in the right direction.

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Suspension

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Differential Pinion Bearing

The Differential Pinion Bearing ensures the smallest gears in the drive differential operate properly. This part might be needed if you hear whirring when slowing down from regular road speed or growling or roaring that changes according to the load and speed. Differential pinion bearings are mounted on the differential. The wheels rely on the differential pinion bearing to enable one of them to safely spin faster than the other.

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Bad Differential: Symptoms, Replacement Cost, & FAQ

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Differential Pinion Flange

A Differential Pinion Flange is a part of the rear differential that acts as a mounting point for the driveshaft. The pinion gear inside the differential is mounted to the other side of the flange.

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Differential Pinion Seal

The Differential Pinion Seal is a small gasket that prevents lubricant from leaking between the rotating pinion gear and the stationary differential housing. It also keeps dirt, water, and other contaminants out and maintains the proper lubrication level needed for the drivetrain to function properly. Pinion seals are made to last, but the constant exposure to the rotation and pressure in the drivetrain can lead to wear. This can cause gear oil to leak around the differential housing.

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Differential Pressure Sensor

A Differential Pressure Sensor measures the exhaust supply pressure from diesel oxidation catalysts and downstream pressure. It sends data to the powertrain control module (PCM) to calibrate diesel particulate filter (DPF) exhaust system operation.

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Differential Rebuild Kit

Differential Rebuild Kits have the necessary components and tools to replace the bearings, seals, shims, and other parts. They make it easier to repair or install the differential.

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Differential Seal

The differential seal prevents differential fluid from leaking out of the gap between the differential case and differential cover. The differential has gears and bearings inside, and they need to be properly lubricated with fluid in order to function properly. If the differential seal fails, fluid is going to leak out and cause differential problems such as excessive wear. Like most seals, the differential seal is made using rubber, which is a material that can become brittle and crack over years of use.

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Differential Shaft

The Differential Shaft is a crucial component of the differential system. The differential is a gear train responsible for letting the wheels on the same axle rotate at different speeds. Two wheels on the same axle need to rotate at varying speeds when turning because it improves the stability and the driver’s ability to control the vehicle.

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Differential Spring

The Differential Spring smoothens the differential by applying equal tension to the differential plates and balls. This part might be needed if one of the stock or current differential springs causes unpleasant vibrations because of unevenly distributed tension. Differential springs are located between the plates and the balls, generating friction and tension between the parts they connect to prevent unnecessary movement. The differential needs the springs to ensure vibrations don’t disrupt the vehicle’s ride.

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Bad Differential: Symptoms, Replacement Cost, & FAQ

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Differential Temperature Gauge

A Differential Temperature Gauge is a monitoring device that lets drivers keep an eye on the temperature of the gear oil in the rear differential of a vehicle. They provide accurate readings to prevent premature wear and maintain optimal performance. These gauges are especially useful for trucks towing heavy loads or covering long distances.

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Accessories and Interior

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Dimmer Relay

The Dimmer Relay is a type of switch that closes and opens the circuit of a dimmer switch, which lets you control the intensity of your automotive lights with the press of a button. There are two main types of dimmer switches in a vehicle, namely the headlight dimmer switch and the dashboard dimmer switch. You can get a multi-purpose dimmer relay, or you can get one that’s specifically designed for a specific car light.

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What Is a Car Dimmer Switch?

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Dimmer Switch

The Dimmer Switch is an electrical component that allows the driver to control the vehicle’s headlights. It can adjust the headlight intensity from full beam to low beam, essentially dimming the lights when needed. Many state laws require that headlights be turned on during adverse weather conditions when windshield wipers are necessary. A low beam headlight option is especially helpful in these instances because high beam headlights might compromise vision.

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Diode Plate

The Diode Plate is a metal plate that can hold multiple diodes for the vehicle’s alternator. The diodes ensure that the current flowing through them in the alternator is only flowing in a single direction. These diodes protect the vehicle’s equipment from current spikes.

Diode plates can also hold posts. Alternators typically have two aluminum heat sinking plates each in what’s called a diode bridge. One diode bridge plate connects to the alternator body while the other connects to the output, transferring direct current to the rest of the vehicle’s electrical components.

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Distributor

The Distributor is responsible for sending power to the spark plugs and making sure that they fire in the right sequence. This is a necessary step for ignition, making it a crucial component when it comes to starting a vehicle.

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What is a Distributor?

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Distributor Cap

A Distributor Cap protects the internal components of a distributor, sealing it and blocking contaminants from entering. This minimizes the buildup of gunk and grease and keeps the rotor secure. Securing the rotor is important because it delivers power to the spark plugs in the correct firing order.

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Distributor Cap Cover

The Distributor Cap Cover is a small piece of plastic that fits against a vehicle’s distributor cap, protecting it from dust and other errant debris. The distributor cap cover also keeps the metal inserts in the distributor caps and the wires from arcing and shorting. The distributor cap itself, which is made of molded plastic with metal inserts, works with the distributor cap cover to protect the distributor so the vehicle’s ignition coils can function.

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Ignition

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Distributor Mounting Gasket

The distributor mounting gasket ensures that no water or fluids enter the engine’s distributor. The distributor is an ignition component that distributes electrical current to each engine spark plug. Like many gaskets, the distributor mounting gasket can become brittle over time. Given its proximity to the engine, the gasket needs to be heat-resistant.

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Distributor O-Ring

The Distributor O-Ring is the seal between the distributor shaft and the engine that prevents leaks and keeps contaminants out. This part might be needed if you have oil leaking from the distributor’s base, indicating a failed distributor O-ring that needs replacement before the engine gets damaged.

Mounted on grooves within the distributor shaft, the distributor O-ring seals engine pressure, gases, and oil. The engine relies on the distributor O-ring to prevent engine oil loss and contamination.

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What is a Distributor?

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Distributor Pole Piece

The Distributor Pole Piece is a part of the ignition system that sits between the retainer and the capacitor. It extends the magnetic circuit of the electric motor, which concentrates the magnetic field around the area where it will be most effective. Distributor pole pieces are usually round and typically made of high-permeability metal such as soft iron. They’re usually sold per piece along with the hardware necessary for installation.

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Distributor Primary Lead Wire

The Distributor Primary Lead Wire is wire that consists of two smaller lengths of wire that extend from the distributor to the spark plugs. The distributor is an ignition component in older vehicles that sparks the engine’s spark plugs. This wire might also be called a hook-up wire or lead. The exact length of the wire and the connectors that link to it varies depending on the vehicle’s make and model.

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Distributor Reluctor

A distributor reluctor is a metal ring spun by the distributor shaft. When the reluctor passes the magnetic pickup, it generates electrical signals that control the current to the ignition coil. The metal ring has teeth placed in specific intervals so that it can generate electric signals in the correct frequency. Distributors and distributor reluctors are found in older vehicles because modern vehicles have electronic ignition systems.

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Distributor Rotor

The Distributor Rotor directs the high-tension voltage generated by the ignition coil to the distributor cap. This part might be needed if you have a bad distributor rotor that causes problems like misfiring and failure to start the engine. Distributor rotors are mounted on the distributor shafts, and they route the required voltage to the spark plugs at the precise time and in the correct order. The spark ignition system needs the distributor rotor to ensure successful fuel ignition.

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Distributor Vacuum Advance

The Distributor Vacuum Advance is an ignition timing control mechanism that consists of a vacuum canister, a linkage, and an advance plate mounted inside the distributor. It’s specifically designed to improve throttle response and help the engine run cooler. Not all vehicles are equipped with a vacuum advance, but they’re typically found in street cars for better engine efficiency. It works by pulling the diaphragm inside the canister when the engine vacuum rises.

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DOHC Lock Tool

A dual overhead camshaft or DOHC Lock Tool is used to secure the camshaft sprockets in place when replacing the timing belt or chain. Using this tool also preserves the engine timing.

Some DOHC lock tools have parallel bars that let the knurled pins align with the sprockets.

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Dome Light

The Dome Light illuminates the entire cabin unlike the map light, which only shines a light in one direction. The dome light is typically found in the center of the ceiling, near the headrests, or right by the driver’s head.

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Dome Light Bulb

The dome light bulb is the bulb that’s designed to illuminate your vehicle’s cabin. The dome light bulb specifically illuminates the dome light, which is typically located in between the driver and passenger rows. The dome light can be helpful when passengers are entering and exiting the vehicle at night since the light illuminates the cabin. These bulbs typically come in various sizes and bulb colors to suit people’s different preferences.

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Dome Light Lens

The Dome Light Lens is the lens that spreads the light emitted by the dome light bulb. This part might be needed if the current dome light lens has worn out or if you want to alter the vehicle light’s appearance or color. Fitted on the dome light on a vehicle’s ceiling, the dome light lens also protects the light’s internal parts from dust. You need a dome light lens that can provide sufficient illumination and match the appearance of your vehicle’s interior.

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Door Applique

The Door Applique is a type of automotive trim that fits over a vehicle’s window pillars. It sits to the side of the glass and covers the rest of the pillar, creating a smooth finish. It often includes a polymer sheet that insulates the applique’s metal portion and protects it from bumps and scratches. The applique sometimes includes a channel for the vehicle’s window glass to slide through when the window opens or closes.

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Door Control Module

The Door Control Module lets the driver perform specific operations related to vehicle doors, including lock/unlock, seat and window adjustment, mirror fold, defrost, and more.

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Door Frame

The Door Frame provides support and stability to the car door. It serves as the attachment point for the door hinges, connecting the door to the body.

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What are the Parts of a Car Door?

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Door Glass

The Door Glass is the visible pane within the window system, often made of tempered glass. It is designed to withstand impact and prevent shattering during accidents. It also protects drivers and passengers from external elements.

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Door Glass Weatherstrip

The Door Glass Weatherstrip is responsible for sealing the tiny gaps on vehicle doors, especially near the windows. It also prevents debris from entering the vehicle and stops contaminants from reaching the door’s internal moving parts.

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When Should You Replace Your Vehicle’s Weatherstripping?

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Door Handle Latch

The Door Handle Latch is the parts that lets drivers and passengers open and close car doors. The latch itself is a spring-loaded metal part that extends from the door into the door frame, keeping it in place. When the handle is lifted or turned, the latch retracts and allows the door to open or close. Letting go of the handle extends the latch once more, securing the door.

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Door Hinge

The door hinge is the component that allows your vehicle’s door to swing open and close. Aside from giving doors a pivot point, they also hold the door’s weight. There are typically two door hinges for each door, an upper hinge and a lower hinge. Door hinges need to be strong and sturdy, which is why they’re usually made of steel. A damaged door hinge can cause a car door to become misaligned, which can prevent it from being closed properly.

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Door Hinge Bolt

The door hinge bolt is a part that attaches the door hinge to the vehicle’s frame. This fastener might be needed if the current or factory-issue door hinge bolts have corroded or fractured. Door hinge bolts are screwed into the bolt holes of a vehicle’s door hinges. Car doors need door hinge bolts to keep the door hinges and their respective doors attached to the vehicle.

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Door Hinge Bushing

The Door Hinge Bushing is a small, thin tube that allows you to attach your vehicle’s door to its body. This secures the door pin to the door hinge, ensuring that the door doesn’t detach from the body when opening or closing it. Door hinge bushings are usually made of durable steel, such as brass, and you can purchase them individually, by pair, or in sets. They can also vary in size and length.

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Door Hinge Pin

A Door Hinge Pin is a rod-shaped part that fits inside the hollow knuckle of a vehicle’s door hinge.The knuckle is where the hinge leafs on the door meet the hinge leafs on the vehicle’s body. The door hinge pin keeps the leafs together while still allowing the door to swing open. Door hinge pin lengths and designs vary depending on the vehicle’s door type and size. Some hinge pins are held in place by a nut at the end of the pin.

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Door Latch

A door latch is a claw-like component on your vehicle’s door that hooks onto a metal striker located on the door frame when the door is closed. Door latches keep your vehicle’s door closed and locked during travel. The door latch won’t release the striker unless the vehicle’s interior or exterior door handles are pulled. A cable typically links the door latch to the door handles. Door latches need to be durable. Hence, they’re typically made from stamped metal.

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Door Latch Bracket

The Door Latch Bracket covers the door latch, ensuring the latch opens and closes as intended. This part might be needed if the current or factory-issue bracket breaks down or wears out. Door latch brackets are mounted on a vehicle’s door latch, and reinforcement-type brackets can strengthen fatigued door panels. Car doors need door latch brackets to ensure that they open and close properly.

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Door Latch Buffer

The Door Latch Buffer is a small component in the door latch that prevents the doors from opening easily. Door latch buffers are typically made of plastic, and when they break or fall off, the door latch mechanism can fail to lock. You’ll notice a hard or metallic thud whenever you try to close your car door. You can buy door latch buffers individually or in a set, but be sure to order one for each door latch.

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Door Latch Cable

The Door Latch Cable is a mechanical cable component connecting the inner door handle to the door latch mechanism. When pulling the inner door handle, the door latch cable unlocks the door latch mechanism, allowing the driver or passenger to open the vehicle door from the inside. Any fault in the door latch cable can lead to the vehicle door not opening properly or staying closed.

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Door Lock

The door lock is the mechanism that keeps the door closed by hooking onto the latch located on the door frame. Door lock mechanisms can come in several forms. They can be like a door lock actuator, which is a whole assembly installed on the side of doors that controls the vehicle’s locks. Alternatively, door locks can be small lock cylinders that require the key to be turned to unhook a hinge and unlock the door.

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Door Lock Actuator

The Door Lock Actuator moves power locks in a vehicle’s doors. This part might be needed if the current or stock door lock actuator makes noise, works erratically, operates slowly, or has failed. Door lock actuators are mounted inside their respective doors, and they keep the doors locked while driving, unlocking the doors as needed. Door locks need this part to move the latch that locks and unlocks their doors.

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Door Lock Actuator Connector

The Door Lock Actuator Connector is a device that delivers power to the door lock actuator, which is a reversible motor that controls the locking and unlocking of car doors. Over time, damaged connectors can cause electrical issues that disrupt the flow of electrical current to the door lock actuator, preventing the door locks from working. You can connect a multimeter to the actuator connector to check for voltage and determine if it’s the issue.

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Door Lock Actuator Motor

The Door Lock Actuator Motor is the motor that triggers the door lock actuator as controlled by the vehicle’s dashboard. It facilitates easy locking from one control panel, preventing the driver from needing to reach back to lock the doors manually. The system makes locking and unlocking the doors more convenient for drivers and passengers alike. The motor links to both the door lock actuator and the rest of the vehicle’s electrical system.

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Door Lock Clip

The Door Lock Clip secures the door lock assembly to the door. This part might be needed if one or more door lock clips in your car have corroded, failed, or worn out. Door lock clips are mounted on the door lock, and they press the door lock against the vehicle’s door by sliding over the door lock cylinder’s grooves. The door lock depends on its door lock clips to prevent it from moving the wrong way and minimize damage from use.

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Door Lock Cylinder

The Door Lock Cylinder is the tubular part that can lock and unlock the door with a car key. This part might be needed if the current door lock cylinder develops an issue like getting stuck in the locked or unlocked position. Door lock cylinders are mounted on the base of the vehicle’s windows, and they contain pins that interact with the car key. The doors need the door lock cylinders to maintain the vehicle’s security.

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Door Lock Knob

A Door Lock Knob is a metal or plastic component found in older vehicles designed to show whether a door is locked or unlocked from the outside. The driver or passengers inside the vehicle may pull it up or press it down to engage and disengage the door lock.

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Door Lock Switch

The Door Lock Switch is the electrical switch that locks and unlocks the car doors. Activating it will send a signal to the door lock relay, which will then trigger the door lock actuator inside the door. Over time, door lock switches can wear due to constant use. However, the entire door lock assembly is typically replaced when replacing a faulty door lock switch.

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Door Lock Switch Connector

The Door Lock Switch Connector is an electrical component that connects the door lock switch to the rest of a vehicle’s electrical system. The door lock switch sends signals through the connector to the vehicle’s door lock actuators, which closes or interrupts the circuit depending on which way the switch is flicked. This allows the switch to control which doors lock or unlock. A master door lock switch can often be found on the driver’s side, and its connector can send signals to all the vehicle’s doors.

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Door Plug

The Door Plug is a small rubber plug that covers hardware access holes on car doors. High-quality door plugs are made from durable rubber that can withstand wear. You can get universal door plugs or find one specifically designed for your vehicle’s year, make, and model. It’s best to get a door plug with a flush mount design for a seamless and clean look when installed. A well-fitting door plug can also prevent any protrusions or gaps where water and dirt can enter.

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Door Seal

The Door Seal, also known as weather stripping, is a rubber seal that fits around a vehicle’s car windows and doors. This seal creates a barrier through which rain, dust, dirt, and bugs cannot enter through from outside the vehicle. It also prevents warm or cooled air from escaping the vehicle’s cabin. The door seal also makes drives more comfortable by preventing drafts and reducing noise. The exact design of the door seal varies from one vehicle to the next depending on the vehicle’s door and window designs.

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Drum Brake Adjuster

A Drum Brake Adjuster is a component in the drum brake system that helps maintain the apt distance between the brake shoes and the brake drum once the shoes wear down. There are two types of adjusters: manual adjusters and self-adjusters.

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Drum Brake Self Adjuster Cable

The Drum Brake Self Adjuster Cable is the component responsible for readjusting the brake shoe distance from the drum. Maintaining the correct distance between the brake shoes and the drum allows the brakes to function effectively.

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Drum Brake Springs

Drum Brake Springs dampen the noise produced by the brakes due to high-frequency drum vibration.

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DVD Player Remote Control

A DVD Player Remote Control is a handheld remote that’s designed to wirelessly operate in-car DVD entertainment systems. It allows passengers to navigate playback options, adjust volume, and control other functions even from the back seat.

It’s important to note that not all in-car entertainment systems are compatible with an aftermarket remote.

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