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2009 Cadillac STS

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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Passenger Side - After Catalytic Converter Oxygen Sensor, 4-wire, 6 Cylinder, 3.6L Engine
Part Number: REPC960913
Guaranteed to Fit
$24.99
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L
Product Details
Location : Passenger Side - After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024773Connector 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, Passenger Side Oxygen Sensors, 4-wire, 6 Cylinder, 3.6L Engine - After Catalytic Converter, Passenger Side
Part Number: SET-REPC960913-2
Guaranteed to Fit
$47.49
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L
Product Details
Location : After Catalytic Converter, Passenger SideComponents : (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, Driver and Passenger Side Oxygen Sensors 4-wire
Part Number: SET-REPC960917-4
Guaranteed to Fit
$99.49
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L
Product Details
Location : Before and After Catalytic Converter, Driver and Passenger SideComponents : (4) Oxygen SensorsType : 4-wireQuantity Sold : Set of 4Product Fit : Direct FitWarranty : 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 Sensors, Set of 2, 4-Wire, 8 Cyl, 4.4L Engine
Part Number: SET-REPF960909-2
Guaranteed to Fit
$39.99
Vehicle Fitment
  • 2009 Cadillac STS V 8 Cyl 4.4L
Product Details
Location : After Catalytic ConverterComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 11.77 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector 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
Oxygen Sensor, 4-Wire, Heated
Part Number: REPC960919
Guaranteed to Fit
$33.99
Vehicle Fitment
  • 2009 Cadillac STS Platinum 8 Cyl 4.6L
  • 2009 Cadillac STS Base 8 Cyl 4.6L
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 11.42 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024492Connector 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
Oxygen Sensor, Set of 2 4-wire
Part Number: SET-REPC960919-02
Guaranteed to Fit
$55.49
Vehicle Fitment
  • 2009 Cadillac STS Platinum 8 Cyl 4.6L
  • 2009 Cadillac STS Base 8 Cyl 4.6L
Product Details
Location : Before Catalytic ConverterComponents : (2) Oxygen SensorType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 11.42 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector 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
Oxygen Sensor, 6 Cyl., 3.6L Engine, 4-Wire, Heated
Part Number: REPC960917
Guaranteed to Fit
$32.99
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.75 in. Wire LengthInterchange Part Number : 25024324Warranty : 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
Part Number: SET-REPC960917-2
Guaranteed to Fit
$46.49
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L
Product Details
Location : Before Catalytic Converter, Driver and Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 14.75 in. Wire LengthWarranty : 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
Part Number: SET-ARBS960920-2
Guaranteed to Fit
$46.49
Vehicle Fitment
  • 2009 Cadillac STS V 8 Cyl 4.4L
Product Details
Location : Before Catalytic Converter, Driver and Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 22.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024648Connector 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, Driver Side Oxygen Sensor, 4-Wire, Heated
Part Number: RC96090017
Guaranteed to Fit
$26.49
Vehicle Fitment
  • 2009 Cadillac STS Platinum 8 Cyl 4.6L
  • 2009 Cadillac STS Base 8 Cyl 4.6L
  • 2009 Cadillac STS V 8 Cyl 4.4L
Product Details
Location : Driver Side - After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 26.57 in. Wire LengthInterchange Part Number : 25024728Warranty : 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 Side Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344244
Guaranteed to Fit
$55.49
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L O.E. Quality Replacement Sensor
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic Converter, Driver SideType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 12.6 in. Wire LengthThread Size : M18 Thread SizeInterchange Part Number : 15730, SG300Connector Gender : Male ConnectorWarranty : 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 Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034428
Guaranteed to Fit
$62.49
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L Eng. Designation: LLT, Eng. VIN: V, FI, Naturally Aspirated, GAS
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L Eng. Designation: LLT, Eng. VIN: V, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.76 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
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034003
Guaranteed to Fit
$43.99
Vehicle Fitment
  • 2009 Cadillac STS Base 6 Cyl 3.6L Eng. Designation: LLT, Eng. VIN: V, FI, Naturally Aspirated, GAS
  • 2009 Cadillac STS Platinum 6 Cyl 3.6L Eng. Designation: LLT, Eng. VIN: V, FI, Naturally Aspirated, GAS
Product Details
Location : Passenger Side, After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.76 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
Oxygen Sensor, Sold individually 4-wire
Part Number: DELES20355
Guaranteed to Fit
$58.49
Vehicle Fitment
  • 2009 Cadillac STS V 8 Cyl 4.4L
Product Details
Location : FrontType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 19.69 in. Wire LengthWarranty : 1-year or 12,000-mile Delphi 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.

OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS15131
Guaranteed to Fit
$50.99
Vehicle Fitment
  • 2009 Cadillac STS V 8 Cyl 4.4L OE sensor technology
Product Details
Location : UpstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 16.9 in. Wire LengthInterchange Part Number : 2344212Warranty : 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
Page 1 of 5 | Showing 1 - 15 of 75 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:2012 GMC Acadia 3.6l, C02 sensor bank 1 sensor 2?
James J.
A:BEST ANSWERHi James, I'm glad to assist you. I just answered your previous question and you were referring to a camshaft position sensor. Now, do you need an oxygen sensor for upstream and downstream sensors? If you need this one sensor only for the upstream location, bank one. It is a match with your SUV. Click the link below to buy it today while on sale. Happy shopping! https://www.carparts.com/oxygen-sensor/walker-products/wkp35034003?can=cpje1043_CSQA_20240328 Show less
Jeonino 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?