{
    "lazyNodes": false,
    "abFitnotesFlag": false,
    "abCrawlReviews": true,
    "productOptionsCookie": false,
    "orderDelayFlag": false,
    "skipSessionCookie": false,
    "covidMessage": false,
    "fullTitleCookie": false,
    "nrLoggerCookie": true,
    "checkoutReviewCookie": false,
    "productOptionSeqCookie": false,
    "maintenanceFlag": false,
    "bufferETACookie": false,
    "multiShippingDiscountFlag": false,
    "newFitmentFlag": false,
    "surveyOptInFlag": true,
    "crossSellFlag": false,
    "skuMappingFlag": false,
    "paySplitCookie": false,
    "callDisableFlag": true,
    "zipPaymentFlag": "c",
    "hassleFreeReturn": true,
    "lifetimeReplacement": true,
    "cpn_off": false
}
2004 Isuzu Ascender

Oxygen Sensors

Some telltale signs that your oxygen sensor is starting to fail include the check engine light coming on, poor fuel economy, and the engine running rough. Get a replacement as soon as you confirm that your oxygen sensor is bad. The great news is that here at CarParts.com, we have an oxygen sensor replacement for every application (upstream, downstream, before/after the catalytic converter, etc.). Choose from our wide range of high-quality O2 sensors manufactured by the most reputable names in the industry.
Refine by:
See All
See All

Shop Catalog

Showing 1 - 15 of 67 results
Display item:
15
30
45
Sort by:
Before Catalytic Converter Oxygen Sensor, 5.3L Engine, LS, Limited Models
Part Number: ARBP960910
Guaranteed to Fit
$23.99
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024269Connector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Before Catalytic Converter, Driver and Passenger Side Oxygen Sensors 4-wire, Engine VIN: P, FI, Naturally Aspirated, GAS
Part Number: SET-ARBP960910-2
Guaranteed to Fit
$40.49
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L Engine VIN: P, FI, Naturally Aspirated, GAS
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L Engine VIN: P, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic Converter, Driver and Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 15.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024269Connector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Before and After Catalytic Converter Oxygen Sensors, 4-Wire, 8 Cylinder, 5.3L Engine
Part Number: SET-REPC960915
Guaranteed to Fit
$42.99
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L FI, Naturally Aspirated, GAS
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L FI, Naturally Aspirated, GAS
Product Details
Location : Before And After Catalytic ConverterComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Before and After Catalytic Converter Oxygen Sensors, 4-Wire, 8 Cylinder, 5.3L Engine
Part Number: SET-REPC960915-4
Guaranteed to Fit
$86.49
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L FI, Naturally Aspirated, GAS
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L FI, Naturally Aspirated, GAS
Product Details
Location : Before And After Catalytic ConverterComponents : (4) Oxygen SensorsType : 4-wireQuantity Sold : Set of 4Product Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Before Catalytic Converter Oxygen Sensor, 4.2L Engine, LS, Limited, S Models
Part Number: RC96090004
Guaranteed to Fit
$26.11
Vehicle Fitment
  • 2004 Isuzu Ascender S 6 Cyl 4.2L
  • 2004 Isuzu Ascender Limited 6 Cyl 4.2L
  • 2004 Isuzu Ascender LS 6 Cyl 4.2L
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 25024654Connector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
After Catalytic Converter Oxygen Sensor, 4.2L Engine, LS, Limited, S Models
Part Number: RC96090002
Guaranteed to Fit
$19.24
Vehicle Fitment
  • 2004 Isuzu Ascender S 6 Cyl 4.2L
  • 2004 Isuzu Ascender LS 6 Cyl 4.2L
  • 2004 Isuzu Ascender Limited 6 Cyl 4.2L
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.19 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeReplaces OE Number : 12590750, 8125907500Interchange Part Number : 25024339, 12590750, 8125907500Connector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Before and After Catalytic Converter Oxygen Sensor, Set of 2 4-wire
Part Number: SET-RC96090002-2A
Guaranteed to Fit
$42.49
Vehicle Fitment
  • 2004 Isuzu Ascender S 6 Cyl 4.2L
  • 2004 Isuzu Ascender Limited 6 Cyl 4.2L
  • 2004 Isuzu Ascender LS 6 Cyl 4.2L
Product Details
Location : Before And After Catalytic ConverterComponents : (2) Oxygen SensorType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitReplaces OE Number : 12590750, 8125907500Interchange Part Number : 12590750, 8125907500Warranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
After Catalytic Converter Oxygen Sensor, 5.3L Engine, LS, Limited Models
Part Number: REPC960915
Guaranteed to Fit
$27.60
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.8 in. wire lengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024836Connector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
After Catalytic Converter, Driver and Passenger Side Oxygen Sensors 4-wire, Engine VIN: P, FI, Naturally Aspirated, GAS
Part Number: SET-REPC960915-2
Guaranteed to Fit
$44.49
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L Engine VIN: P, FI, Naturally Aspirated, GAS
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L Engine VIN: P, FI, Naturally Aspirated, GAS
Product Details
Location : After Catalytic Converter, Driver and Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 13.8 in. wire lengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: 25024269
Guaranteed to Fit
$39.99
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15.75 in. Wire LengthInterchange Part Number : ARBP960910Warranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Original Equipment Base Sensor
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034524
Guaranteed to Fit
$40.49
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L Eng. VIN: P, FI, Naturally Aspirated, GAS
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L Eng. VIN: P, FI, Naturally Aspirated, GAS
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.78 in. Wire LengthWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Aftermarket Base Sensor
OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS15895
Guaranteed to Fit
$48.49
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L OE manufactured part
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L OE manufactured part
Product Details
Location : DownstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.1 in. Wire LengthMounting Style : Threaded-in Mounting StyleConnector Gender : Male ConnectorWarranty : 1-year Bosch limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsSeries : OE Replacement Series
Before Catalytic Converter GM Original Equipment Series Oxygen Sensor, Sold individually 4-wire
Part Number: AC2131698
Guaranteed to Fit
$105.49
Vehicle Fitment
  • 2004 Isuzu Ascender S 6 Cyl 4.2L In Exhaust Manifold
  • 2004 Isuzu Ascender Limited 6 Cyl 4.2L In Exhaust Manifold
  • 2004 Isuzu Ascender LS 6 Cyl 4.2L In Exhaust Manifold
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.97 in. Wire LengthThread Size : 18 mm Thread SizeInterchange Part Number : 15733, SG300Connector Gender : Male ConnectorWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : GM Original Equipment Series
OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS15896
Guaranteed to Fit
$38.49
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L OE manufactured part
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L OE manufactured part
Product Details
Location : UpstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.2 in. Wire LengthMounting Style : Threaded-in Mounting StyleInterchange Part Number : 2344668Connector Gender : Female ConnectorWarranty : 1-year Bosch limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsSeries : OE Replacement Series
Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344647
Guaranteed to Fit
$46.99
Vehicle Fitment
  • 2004 Isuzu Ascender LS 8 Cyl 5.3L O.E. Quality Replacement Sensor
  • 2004 Isuzu Ascender Limited 8 Cyl 5.3L O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 2344668, 13193Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Page 1 of 5 | Showing 1 - 15 of 67 results

Top Rated Products

To paying customers, never pay for parts until you physically have or see the parts nSee More
Todd J.
VERIFIED PURCHASER
I ordered these for my 2010 Ford F-150 XLT and they work for downstream sensors but dSee More
Dylan J.
VERIFIED PURCHASER

Product Questions & Answers

Q:Can plugs on 02 sensors be switched over,  new sensor has male ,my old sensor has female ,they same color wires can it work? Show Less
Roger L.
A:BEST ANSWERHi Roger, thank you for reaching out! No, they need to be the same. Maybe you have an incorrect sensor? Show less
Andrew B.
 
1 Question, 1 AnswerView all Q&As >
Q:Hy I trying to buy all the o2 sensors for my 2002 Tahoe flex fuel vin # z which other part number for the upstream and downstream? I think I have four Show Less
Tony …….
A:BEST ANSWERHi Tony, I'm glad to assist you. Give our Sales Team a call at 1-866-529-0412 with the complete VIN for them to check on what we have available for your Tahoe. I hope this helps, and happy shopping. Show less
Arnel E.
 
1 Question, 1 AnswerView all Q&As >

Shopping for Oxygen Sensor

Oxygen Sensor Shopping Info

What Is an Oxygen Sensor?

Modern vehicles are equipped with oxygen sensors, which monitor the amount of oxygen in the exhaust pipe. This part works with the engine control module to maintain your vehicle’s performance and keep its emissions in check.

How Much Does an Oxygen Sensor Replacement Cost?

Replacement oxygen sensors cost anywhere from $10 to $600 for the part alone. Factors that affect this part’s pricing include quantity, location, sensor type, and kit inclusions. Labor can cost you an additional $60 to $70, depending on where you live.

Shop for Aftermarket Oxygen Sensors on CarParts.com

Need to get an OE-grade oxygen sensor replacement fast? Here at CarParts.com, you don’t have to wait in line at a brick-and-mortar store just to get the part you need. With just a few clicks, you can get your orders delivered right to your doorstep in as fast as two business days.

Oxygen sensor replacements are typically sold individually, but you can also purchase them in sets of two or in kits that include catalytic converters. They’re also sold in a variety of inlet types and dimensions, so make sure to double-check if you’ve chosen a part with the right specifications.

With all these options and specifications to look out for, shopping for oxygen sensors can seem like an intimidating task. But with our user-friendly website, you can buy the right oxygen sensor in just a few clicks. Our products are manufactured in world-class facilities and have gone through strict tests to ensure their quality. This way, you can rest easy knowing that you’re getting high-quality products at unbeatable prices.

To view oxygen sensors and other compatible parts for your vehicle, use our vehicle selector tool and enter your vehicle’s specific year, make, and model. You can also indicate your preferences using our search filters. Buying oxygen sensors is easy and convenient here at CarParts.com. Shop now!

Helpful Automotive Resources

P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)P0141 is part of a family of codes listed as follows: P0141 – Sensor Heater Circuit Bank 1 Sensor 2 P0161 – Sensor Heater Circuit Bank 2 Sensor 2 P0135 – O2 Sensor Heater Circuit Bank 1 Sensor 1 P0155 – O2 Heater Circuit Bank 2, Sensor 1 Make sure you know bank 1 from
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3When there are only 3 O2 sensors it’s typically because there’s only one catalyst being monitored, and “Bank 1” is the default designation when there’s only one sensor in a category. Diagram showing 3 oxygen sensors | Image Source: Richard McCuistian
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)Due to this, the O2 sensor features an integrated heater circuit to bring it up to operating temperature after a cold start. When this circuit stops functioning properly, it can trigger a P0135. The oxygen sensor monitors your vehicle’s air-to-fuel ratio. What Does the P0135 Code Mean?