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2017 Mercedes Benz CLA250

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.
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Before Catalytic Converter Oxygen Sensor, 5-wire, 4 Cyl., 2.0L Engine, Wideband Sensor, Turbocharged, B1S1
Part Number: REPM960923
Guaranteed to Fit
$52.49
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L FI, Turbocharged, FLEX, B1S1
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L FI, Turbocharged, GAS, B1S1
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 20 in. Wire lengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25025043Connector 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
Before Catalytic Converter Oxygen Sensor, FI, Turbocharged, FLEX, B1S1, Sold individually, 5-wire, 4 Cyl 2.0L, Walker Products Original Equipment Base Sensor - Before Catalytic Converter
Part Number: WKP25025043
Guaranteed to Fit
$95.49
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L FI, Turbocharged, FLEX, B1S1
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L FI, Turbocharged, GAS, B1S1
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 21.65 in. Wire LengthInterchange Part Number : REPM960923Warranty : 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
After Catalytic Converter Oxygen Sensor, FI, Turbocharged, GAS, B1S2, Sold individually, 4-wire, 4 Cyl 2.0L, Walker Products Aftermarket Base Sensor
Part Number: WKP35034723
Guaranteed to Fit
$52.99
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L FI, Turbocharged, FLEX, B1S2
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L FI, Turbocharged, GAS, B1S2
Product Details
Location : After Catalytic ConverterNotes : 20 ga. Wire Measurement; 22.76 in. Overall Length; Heated Sensor TypeType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 10.35 in. Wire LengthThread Size : 18 mm Thread SizeConnector Gender : Female ConnectorWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Nickel (Metallic), 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
Front Oxygen Sensor, Sold individually, 4 Cyl 2.0L
Part Number: FAC108472
Guaranteed to Fit
$70.99
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L
Product Details
Location : FrontQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 22.44 in.Replaces OE Number : A0035427118, A0035427018, 7540168, 7539123, 11787539123, 11787540168, 13627793825, 7793825, 5149027AA, 226935DC0A, 226935DD0A, K05149027AA, A0095425918, A0085422918, A0075420118, A0095425618Interchange Part Number : A0035427118, A0035427018, 7540168, 7539123, 11787539123, 11787540168, 13627793825, 7793825, 5149027AA, 226935DC0A, 226935DD0A, K05149027AA, A0095425918, A0085422918, A0075420118, A0095425618Warranty : Facet 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.

Before Catalytic Converter Oxygen Sensor, Sold individually, 5-wire, 4 Cyl 2.0L, Bosch Oxygen Sensor - Before Catalytic Converter
Part Number: BS17341
Guaranteed to Fit
$85.99
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L
Product Details
Location : Before Catalytic ConverterNotes : Wideband Heated Sensor Type; 18 Wire Gauge MeasurementType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 22 in.Thread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 22 mm Hex SizeConnector 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 : CarParts EuroSeries : Bosch Oxygen Sensor
Before Catalytic Converter Oxygen Sensor, O.E. Quality Replacement Sensor, Sold individually, 5-wire, 4 Cyl 2.0L - Before Catalytic Converter
Part Number: NP2345158
Guaranteed to Fit
$123.99
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L O.E. Quality Replacement Sensor
Product Details
Location : Before Catalytic ConverterNotes : Heated Sensor TypeType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 21.46 in. Wire LengthThread Size : 0.71 in. Thread SizeWarranty : 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.

Before Catalytic Converter Oxygen Sensor, FI, Turbocharged, FLEX, B1S1, Sold individually, 5-wire, 4 Cyl 2.0L, Walker Products Aftermarket Base Sensor - Before Catalytic Converter
Part Number: WKP35035019
Guaranteed to Fit
$110.49
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L FI, Turbocharged, GAS, B1S1
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L FI, Turbocharged, GAS, B1S1
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 21.65 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
After Catalytic Converter Oxygen Sensor, O.E. Quality Replacement Sensor, Sold individually, 4-wire, 4 Cyl 2.0L
Part Number: NP2344839
Guaranteed to Fit
$111.49
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 12.44 in. Wire LengthWarranty : 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.

After Catalytic Converter Oxygen Sensor, Sold individually, 4-wire, 4 Cyl 2.0L, Bosch Oxygen Sensor - After Catalytic Converter
Part Number: BS16008
Guaranteed to Fit
$60.49
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L
Product Details
Location : After Catalytic ConverterNotes : Heated Sensor Type; 18 Wire Gauge MeasurementType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 22 mm Hex SizeConnector 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 : CarParts EuroSeries : Bosch Oxygen Sensor
Before Catalytic Converter Oxygen Sensor, Sold individually, 5-wire, 4 Cyl 2.0L - Before Catalytic Converter
Part Number: NG24330
Guaranteed to Fit
$110.99
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L
Product Details
Location : Before Catalytic ConverterNotes : 0.38 in. Thread Length; Heated Sensor TypeType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 21.8 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Non-flanged Mounting StyleWarranty : NGK 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.

Before Catalytic Converter Oxygen Sensor, 5-wire, 4 Cylinder, 2.0L Engine, FI, Turbocharged, GAS/FLEX, B1S1
Part Number: JM960923
Guaranteed to Fit
$52.49
Vehicle Fitment
  • 2017 Mercedes Benz CLA250 4Matic 4 Cyl 2.0L FI, Turbocharged, FLEX, B1S1
  • 2017 Mercedes Benz CLA250 Base 4 Cyl 2.0L FI, Turbocharged, GAS, B1S1
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 20 in. Wire lengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25025043Connector Gender : Male ConnectorWarranty : 1-year JC Whitney 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
Atomic, O2 Sensor Wideband
Part Number: M46A2930
Universal Fit
$145.95
Product Details
Quantity Sold : Sold individuallyProduct Fit : UniversalWarranty : 1-year MSD 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.

Additional Promotions : Holley Brands IRS Tax Sale
Oxygen Sensor - Universal, May Require Modification
Part Number: BS15741
Universal Fit
$48.99
Product Details
Notes : Heated Type; Metal Housing Material; Steel Color/FinishType : 4-wireQuantity Sold : Sold individuallyProduct Fit : UniversalWire Length : 27 in. Wire LengthMounting Style : Threaded-in Mounting StyleHex Size : 22 mm Hex SizeConnector Gender : Female ConnectorWarranty : 1-year Bosch limited warrantyPromotions : CarParts EuroSeries : OE Replacement Series
Oxygen Sensor, 4-wire, Universal, Needs Splicing, Walker Products Aftermarket Base Sensor
Part Number: WKP350-34200
Universal Fit
$36.49
Product Details
Notes : 9.37 in. Overall Length; Heated Sensor Type; 20 Wire Gauge MeasurementType : 4-wireQuantity Sold : Sold individuallyProduct Fit : UniversalWire Length : 5.83 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleWarranty : 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
Oxygen Sensor, Sold individually, 4-wire, Walker Products Original Equipment Base Sensor
Part Number: 25024400
Universal Fit
$45.99
Product Details
Notes : 20.0 Wire Gauge Measurement; 18.0 mm Thread DiameterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : UniversalWire Length : 8.25 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 Original Equipment Base Sensor
Page 1 of 2 | Showing 1 - 15 of 23 results

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Product Questions & Answers

Q:Can I purchase all 4 sensors for my 2011 Ram 2500?
Dale F.
A:BEST ANSWERHi Dale, thank you for reaching out. Kindly call our parts team at 1-866-529-0412, so we can help you look for the correct sensors based on your complete vehicle information. Hope to hear from you soon. Show less
Aldrin P.
 
5 Questions, 1 AnswerView all Q&As >
Q:Is this upstream or downstream?
Nef79
A:BEST ANSWERHi Neftaly, I'm glad to assist you. This is a wideband and heated type of universal oxygen sensor. This is commonly used for the front or rear location and you will need to reuse your original connector after some splicing and cutting. Please provide your complete vehicle application and engine size (year, make, model, submodel and engine size.) so we could identify the correct direct fit oxygen sensor for your car. Take advantage of our clearance sale for this part while supply lasts. I hope this helps. Happy shopping. https://www.carparts.com/oxygen-sensor/walker-products/wkp350-34200?can=CPJE1043 Show less
Jeonino E.
 
5 Questions, 1 AnswerView all Q&As >
Q:Will this part replace a Nox sensor 1 for a 2018 Chevrolet Equinox LT Diesel Turbo engine? Show Less
Jen
A:BEST ANSWERHi Jennifer, thank you for reaching out. This universal product may require some modifications to replace the oxygen sensor of the 2018 Chevrolet Equinox LT with a 1.6-liter diesel engine. This part isn't specific to any vehicle. Should you decide to order this part, you can use this link to order this part at a discounted price today while supplies last: https://www.carparts.com/oxygen-sensor/bosch/bs15741?can=CPAP3648_CSQA_20241013 I hope this helps. Enjoy shopping. Show less
Aldrin P.
 
5 Questions, 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)DTC P0141 stands for “Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2).” It indicates that there’s a problem with the heater circuit of engine bank 1’s downstream O2 sensor. Your car’s PCM tests the oxygen sensors’ heater circuits for integrity. If it finds an issue in the heater circuit
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3Diagnostic trouble code (DTC) P0042 stands for “HO2S Heater Control Circuit Bank 1 Sensor 3.” It is logged when the powertrain control module(PCM) detects a possible issue with the heater circuit for the third sensor downstream from the engine on bank 1.
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)The O2 sensor is a component within your vehicle that monitors its air-to-fuel ratio. Your car’s computer uses information from this sensor to regulate fuel mixture and control emissions, but the latter has to be hot enough before this can happen.