How to replace the Heated Oxygen Sensor (HO2S) for Bank 2 Sensor 1 on Buick Enclave?

The first step to replace the bank 2 sensor 1 heated Oxygen Sensor (HO2S) is to take off the fuel injector sight shield. The installation requires disconnecting the ho2s electrical connector from the engine wiring harness electrical connector and dislodging the retainer securing it onto the harness clip. Before proceeding remove the ho2s from its position inside the Exhaust Manifold. For reuse of the original sensor during installation it is essential to apply anti-seize compound gm p/n 12377953 as well as equivalent products to the sensor threads because the ho2s features a special anti-seize compound made of liquid graphite and glass beads for easy removal. Fasten the ho2s on the Exhaust Manifold at 42 n.m torque (31 lb ft). Install ho2s electrical connector retainer to the engine wiring harness clip by connecting the engine wiring harness electrical connector to the ho2s electrical connector before placing the fuel injector sight shield back position.

OEM Buick Enclave Oxygen Sensor

Oxygen O2 Sensor

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7 Oxygen Sensors found

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Buick Enclave Oxygen Sensor Part Number: 12667438
$41.61 MSRP: $84.51
You Save: $42.90 (51%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 2 S; Rear Oxygen Sensor; Front Oxygen Sensor; 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:
- 2018-2024 Buick Enclave | Avenir, Base, Essence, Preferred, Premium | 6 Cyl 3.6 L GAS
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Buick Enclave Oxygen Sensor Part Number: 12634061
$45.24 MSRP: $91.88
You Save: $46.64 (51%)
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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:
- 2009-2011 Buick Enclave | CX, CXL | 6 Cyl 3.6 L GAS
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Buick Enclave Oxygen Sensor Part Number: 12616125
$69.02 MSRP: $140.18
You Save: $71.16 (51%)
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:
- 2009-2011 Buick Enclave | CX, CXL | 6 Cyl 3.6 L GAS
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Buick Enclave Oxygen Sensor Part Number: 12594452
$54.19 MSRP: $110.06
You Save: $55.87 (51%)
Ships in 1-3 Business Days
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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:
- 2008 Buick Enclave | CX, CXL | 6 Cyl 3.6 L GAS
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Buick Enclave Oxygen Sensor Part Number: 12634085
$175.22 MSRP: $355.88
You Save: $180.66 (51%)
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:
- 2012-2017 Buick Enclave | Base, Convenience, Leather, Premium | 6 Cyl 3.6 L GAS
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Buick Enclave Oxygen Sensor Part Number: 12634064
$77.31 MSRP: $157.02
You Save: $79.71 (51%)
Ships in 1-3 Business Days
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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:
- 2012-2017 Buick Enclave | Base, Convenience, Leather, Premium | 6 Cyl 3.6 L GAS
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Buick Enclave Oxygen Sensor Part Number: 12597947
$84.49 MSRP: $171.60
You Save: $87.11 (51%)
Ships in 1-2 Business Days
ADD TO CART
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:
- 2008 Buick Enclave | CX, CXL | 6 Cyl 3.6 L GAS

Buick Enclave Oxygen Sensor

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The Oxygen Sensor in Buick Enclave cars is important as it tracks the air/fuel relation in the engine exhaust to ensure perfect functioning and minimum pollution. Thus, contrasting the level of oxygen in the exhaust to that of fresh air, the sensor produces a voltage signal to the engine control computer regarding the mixture quality: rich or lean. This feedback enables the computer to vary the fuel injector pulse width in a manner to get maximum conversion efficiency of the catalytic converter and at the same time reducing emissions to a minimum. A Buick Enclave automobile requires at least two oxygen sensors, one before the catalytic converter and the other after it; the pre-converter sensor is especially this feedback source. The sensor works at high temperature and may degrade with time mainly due to contamination. Air/fuel ratio sensors that are advanced than oxygen sensors, could be available in some newer automobiles to provide improved measurement of air/fuel ratio.

Buick Enclave Oxygen Sensor Parts Questions & Experts Answers

Oxygen Sensor
12594452
Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 2 Sensor 1 on Buick Enclave?
A:
The first step to replace the bank 2 sensor 1 heated Oxygen Sensor (HO2S) is to take off the fuel injector sight shield. The installation requires disconnecting the ho2s electrical connector from the engine wiring harness electrical connector and dislodging the retainer securing it onto the harness clip. Before proceeding remove the ho2s from its position inside the Exhaust Manifold. For reuse of the original sensor during installation it is essential to apply anti-seize compound gm p/n 12377953 as well as equivalent products to the sensor threads because the ho2s features a special anti-seize compound made of liquid graphite and glass beads for easy removal. Fasten the ho2s on the Exhaust Manifold at 42 n.m torque (31 lb ft). Install ho2s electrical connector retainer to the engine wiring harness clip by connecting the engine wiring harness electrical connector to the ho2s electrical connector before placing the fuel injector sight shield back position.