How to replace the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 on Cadillac STS?

To replace the heated Oxygen Sensor (HO2S) bank 1 sensor 2, one should ensure safety by lifting and supporting the vehicle. Disconnect the Oxygen Sensor wire routing, carefully making sure to note the wire routing, as well as attachment points where the electrical connector attaches to the sensor. Take off the Oxygen Sensor from the Exhaust Pipe, making sure that you apply a special anti-seize compound to the thread; only new service sensors should already have this applied while reused sensors need to be coated with anti-seize compound p/n 5613695.or equivalent. Mount the new Oxygen Sensor to the Exhaust Pipe, making sure it gets tightened to 42 n.m (31 lb ft). Route and attach the wiring which you mentioned in disassembly, reconnect the Oxygen Sensor electrical connector, and lastly lower the vehicle.

OEM Cadillac STS Oxygen Sensor

Oxygen O2 Sensor

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13 Oxygen Sensors found

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Cadillac STS Oxygen Sensor Part Number: 19353381
$130.34 MSRP: $244.38
You Save: $114.04 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly, Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Replaces: 12594935
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2011 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Oxygen Sensor Part Number: 12616203
$97.69 MSRP: $198.42
You Save: $100.73 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2011 Cadillac STS | Base | 6 Cyl 3.6 L GAS
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Cadillac STS Oxygen Sensor, Driver Side Part Number: 12616202
$123.10 MSRP: $250.02
You Save: $126.92 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2011 Cadillac STS | Base | 6 Cyl 3.6 L GAS
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Cadillac STS Oxygen Sensor, Driver Side Part Number: 12601266
$36.31 MSRP: $73.74
You Save: $37.43 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Oxygen Sensor Part Number: 12597449
$92.36 MSRP: $173.44
You Save: $81.08 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2009 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Oxygen Sensor Part Number: 12596327
$132.76 MSRP: $269.65
You Save: $136.89 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor; Front Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Cadillac STS | Base | 6 Cyl 3.6 L GAS, 8 Cyl 4.6 L GAS
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Cadillac STS Oxygen Sensor Part Number: 12575657
$149.69 MSRP: $304.03
You Save: $154.34 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor; Front Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2006 Cadillac STS | Base | 6 Cyl 3.6 L GAS, 8 Cyl 4.6 L GAS
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Cadillac STS Oxygen Sensor Part Number: 12610969
$93.70 MSRP: $175.98
You Save: $82.28 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2010 Cadillac STS | Base, Platinum | 8 Cyl 4.6 L GAS
View related parts
Cadillac STS Oxygen Sensor, Driver Side Part Number: 12597912
$174.78 MSRP: $328.22
You Save: $153.44 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 Cadillac STS | Base | 8 Cyl 4.6 L GAS
View related parts
Cadillac STS Oxygen Sensor Part Number: 12588036
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Cadillac STS | V | 8 Cyl 4.4 L GAS
View related parts
Cadillac STS Oxygen Sensor Part Number: 12590035
$86.70 MSRP: $154.82
You Save: $68.12 (44%)
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Cadillac STS | Base | 6 Cyl 3.6 L GAS, 8 Cyl 4.6 L GAS
View related parts
Cadillac STS Oxygen Sensor Part Number: 12609159
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Replaces: 12598300
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Cadillac STS | V | 8 Cyl 4.4 L GAS
View related parts
Cadillac STS Oxygen Sensor Part Number: 12607145
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2010 Cadillac STS | Base, Platinum | 8 Cyl 4.6 L GAS

Cadillac STS Oxygen Sensor

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The Cadillac STS Oxygen Sensor is one of the parts that this automobile maker focuses on and it can be seen as an important aspect because the reliable functioning of a car depends on its ability to deliver oxygen to the necessary amount. Its primary function is to measure the percentage of unburned oxygen in the exhaust and Cadillac STS Oxygen Sensor controls the air fur ratio, thus improving efficiency and decreasing pollutant production. This sensor produces a voltage translation proportional to the amount of oxygen present, meaning that the engine control computer can adjust the fuel injector pulses, which is important in retaining Cadillac STS's performance indicators. Appearing compatible with the many Cadillac STS models in use today, the Oxygen Sensor most commonly utilizes zirconium dioxide, and comes in two primary versions, a narrow-band and a wide-band. Switchable sensors are known as narrow-band sensors, which give steep rich/lean signals, while the new style of sensors are known as wide-band sensors that give more control of the air-fuel mixture ratio. The Cadillac STS Oxygen Sensor plays an important role because the Oxygen Sensor is used to monitor the emission and fuel efficiency of a vehicle thus, a damaged Oxygen Sensor will increase the rate of emission of gases and decrease the fuel economy of a vehicle. Cadillac STS Oxygen Sensor needs to be checked often as it will determine the prime time to service and clean it. Also, Cadillac STS can be highlighted in the automotive market since it is an example of a car with a comfortable and luxurious design, as well as with the options that are aimed at the security of people, for example, with warnings of lane departure and the presence of blind spots. The inclusion of the Oxygen Sensor into the Cadillac STS does not only enrich the features of the car, but also fortify Cadillac's market image for authority and innovation thus making it the choice of preference for choosy drivers in the market for a car that provides luxury and efficiency.

Cadillac STS Oxygen Sensor Parts and Q&A

Oxygen Sensor
12596327
Q: How to replace the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 on Cadillac STS?
A:
To replace the heated Oxygen Sensor (HO2S) bank 1 sensor 2, one should ensure safety by lifting and supporting the vehicle. Disconnect the Oxygen Sensor wire routing, carefully making sure to note the wire routing, as well as attachment points where the electrical connector attaches to the sensor. Take off the Oxygen Sensor from the Exhaust Pipe, making sure that you apply a special anti-seize compound to the thread; only new service sensors should already have this applied while reused sensors need to be coated with anti-seize compound p/n 5613695.or equivalent. Mount the new Oxygen Sensor to the Exhaust Pipe, making sure it gets tightened to 42 n.m (31 lb ft). Route and attach the wiring which you mentioned in disassembly, reconnect the Oxygen Sensor electrical connector, and lastly lower the vehicle.