How to replace the Heated Oxygen Sensor (HO2S) at Position 2 on Buick LaCrosse?

The first step for heated Oxygen Sensor (HO2S) at position 2 replacement requires you to raise and support the vehicle. Detach the ho2s electrical connector before withdrawing the sensor with caution toward the Exhaust Manifold/pipe threads to prevent damage through excessive force injection. The maintenance process requires engine temperatures exceeding 48°c (120°F) because it helps with the removal operation. The new ho2s requires special anti-seize compound on its threads during installation if you use the same sensor with p/n 5613695 or equivalent and the tightening torque should be between 2 to 42 n.m (31 lb ft). The installment process ends with fastening the ho2s electrical connector after lowering the car. Handle sensors with careful handling by keeping both the in-line electrical connection and louvered end free from contaminants and do not use cleaning solutions.

OEM Buick LaCrosse Oxygen Sensor

Oxygen O2 Sensor

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

16 Oxygen Sensors found

View related parts
Buick LaCrosse Oxygen Sensor Part Number: 19209817
$81.40 MSRP: $165.32
You Save: $83.92 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Replaces: 12616672
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 19209814
$59.22 MSRP: $120.28
You Save: $61.06 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly, Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Replaces: 12574218
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 19209807
$87.79 MSRP: $178.30
You Save: $90.51 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Front Oxygen Sensor
- Replaces: 12570149, 12574924, 12572772
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12683553
$54.34 MSRP: $110.38
You Save: $56.04 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12627140
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2019 Buick LaCrosse | Base, Essence, Preferred, Premium | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV)
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12669969
$38.71 MSRP: $72.70
You Save: $33.99 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 1 Se; Upper Oxygen Sensor; Lower Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2019 Buick LaCrosse | Avenir, Base, Essence, Preferred, Premium, Sport Touring | 6 Cyl 3.6 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12643707
$44.51 MSRP: $70.58
You Save: $26.07 (37%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor; Upper Oxygen Sensor
- Replaces: 12627139
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2019 Buick LaCrosse | Base, Essence, Preferred, Premium | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV)
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12634061
$45.24 MSRP: $91.88
You Save: $46.64 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Front Oxygen Sensor; Upper Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12607333
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2016 Buick LaCrosse | Base, Convenience, Leather, Premium, Sport Touring, Touring | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12616502
$73.54 MSRP: $149.38
You Save: $75.84 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Front Oxygen Sensor; Upper Oxygen Sensor; Sensor, Computer Control Sensors
- Replaces: 12617648
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2016 Buick LaCrosse | Base, Convenience, CX, CXL, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12612430
$75.26 MSRP: $139.54
You Save: $64.28 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Front Oxygen Sensor; Lower Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2011 Buick LaCrosse | CX, CXL, CXS | 4 Cyl 2.4 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12580466
$68.95 MSRP: $140.05
You Save: $71.10 (51%)
Ships in 1-2 Business Days
ADD TO CART
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:
- 2008-2009 Buick LaCrosse | Super | 8 Cyl 5.3 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12576131
$51.58 MSRP: $104.78
You Save: $53.20 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2006 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12656543
$62.58 MSRP: $176.24
You Save: $113.66 (65%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12646200, 12639693
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2016 Buick LaCrosse | Base, Convenience, CX, CXL, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12615124
$96.41 MSRP: $195.82
You Save: $99.41 (51%)
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:
- 2008-2009 Buick LaCrosse | Super | 8 Cyl 5.3 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12597878
$51.58 MSRP: $104.78
You Save: $53.20 (51%)
Ships in 1-2 Business Days
ADD TO CART
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:
- 2007-2009 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12587096
$93.48 MSRP: $189.85
You Save: $96.37 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor; Front Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Buick LaCrosse | CXS | 6 Cyl 3.6 L GAS
View related parts
Buick LaCrosse Oxygen Sensor Part Number: 12584050
$49.06 MSRP: $88.81
You Save: $39.75 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Front Oxygen Sensor; Sensor, Computer Control Sensors
- Replaces: 12603139
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Buick LaCrosse | CXS | 6 Cyl 3.6 L GAS

Buick LaCrosse Oxygen Sensor

Want to cut long-term maintenance and repair costs? Choose OEM Oxygen Sensor. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine Buick LaCrosse parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Buick LaCrosse Oxygen Sensor includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

The Buick LaCrosse Oxygen Sensor is one of the best car parts that greatly improve the functioning and economy of Buick LaCrosse automobiles. Well-known for its durability, the Oxygen Sensor is used to measure the proportions of air and fuel that exist in the engine exhaust to guarantee good combustion and little pollution. In addition the mix sensor "sees" unburned oxygen and produces a voltage signal that actually tells the engine control computer to alter the mixture, making the system a "closed loop" that optimises the catalytic converter activity. Thus, the majority of Buick LaCrosse automobiles contain a bare minimum of two Oxygen Sensors-an upstream and a downstream-which provide precise information concerning the said air/fuel mixture ratio. The element is a high quality zirconium dioxide with platinum coating situated in an impact steady steel shell to measure affluent and scanty conditions. This feature can play a great role in driving up both, fuel efficiency as well as safety since it minimizes emissions. Continuing, let me recall that the Buick LaCrosse which has been developed since 2004 pays attention to the Oxygen Sensor, especially in the second generation equipped with new power source and the eAssist hybrid system. This optimal quality and performance in addition to a progressive environment conscience makes the Buick LaCrosse Oxygen Sensor unique in the automotive business by providing drivers satisfaction and a responsible means for driving without harming the environment.

Buick LaCrosse Oxygen Sensor Parts and Q&A

Oxygen Sensor
12576131
Q: How to replace the Heated Oxygen Sensor (HO2S) at Position 2 on Buick LaCrosse?
A:
The first step for heated Oxygen Sensor (HO2S) at position 2 replacement requires you to raise and support the vehicle. Detach the ho2s electrical connector before withdrawing the sensor with caution toward the Exhaust Manifold/pipe threads to prevent damage through excessive force injection. The maintenance process requires engine temperatures exceeding 48°c (120°F) because it helps with the removal operation. The new ho2s requires special anti-seize compound on its threads during installation if you use the same sensor with p/n 5613695 or equivalent and the tightening torque should be between 2 to 42 n.m (31 lb ft). The installment process ends with fastening the ho2s electrical connector after lowering the car. Handle sensors with careful handling by keeping both the in-line electrical connection and louvered end free from contaminants and do not use cleaning solutions.