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

The vehicle needs to be securely raised while keeping it in position for heated Oxygen Sensor (HO2S) for bank 1 sensor 1 replacement. Use a wrench to remove the retainer between the ho2s electrical connector and engine wiring harness electrical connector and disconnect both components from each other. The Exhaust Manifold should receive the removal of ho2s. Anti-seize compound gm p/n 12377953 or its equivalent should be used to coat the threads during installation when using an existing sensor because ho2s threads contain a unique compound of liquid graphite with glass beads which helps future sensor removal. Fit the ho2s onto the Exhaust Manifold while using a torque of 42 nm (31 lb ft). Together with engine wiring harness attach the connector to the ho2s electrical connector before fastening the engine wiring harness clip to the ho2s electrical connector retainer. Finally, lower the vehicle.

How to Replace a Heated Oxygen Sensor (HO2S) with an Oxygen Sensor Wrench on Buick Regal?

For heated Oxygen Sensor (HO2S) replacement start by collecting these tools: Oxygen Sensor wrench (J 39194). Oxygen Sensor wrench (J 39194). The in-line electrical connector and the louvered end of the ho2s and Oxygen Sensor require special handling for cleansing from soil and oil substances while any cleaning solvents must be avoided. Start by uninstalling the fuel injector sight shield first. When engine temperature falls below 48°c (120°F) the Oxygen Sensor becomes hard to remove because excessive force could break the Exhaust Manifold or Exhaust Pipe threads. Separate the ho2s electrical cpa retainer while you disconnect the ho2s wiring harness from its electrical connector. Use the Oxygen Sensor wrench (J 39194) to carefully take the ho2s out of the right Exhaust Manifold. Placing the rear Oxygen Sensor into the right Exhaust Manifold requires a special anti-seize compound which should be applied to reused sensor threads using p/n 12377953 or equivalent. Use the Oxygen Sensor wrench (J 39194) to torque the ho2s to 41 n.m (30 lb ft) before reconnecting ho2s electrical connector to its bracket and installing the electrical connector retainer after attachment of the harness electrical connector. Then reinstall the fuel injector sight shield.

OEM Buick Oxygen Sensor

Oxygen O2 Sensor

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77 Oxygen Sensors found

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Buick Oxygen Sensor Part Number: 55563348
$105.81 MSRP: $188.94
You Save: $83.13 (44%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1)
Fits the following Buick Models:
- Encore | 2013 | Base, Convenience, Leather, Premium | 4 Cyl 1.4 L GAS
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Buick Oxygen Sensor Part Number: 55489474
$35.52 MSRP: $73.93
You Save: $38.41 (52%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 1 Se
Fits the following Buick Models:
- Envision | 2021-2025 | Avenir, Essence, Preferred, Sport Touring | 4 Cyl 2.0 L GAS
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Buick Oxygen Sensor Part Number: 12667438
$41.72 MSRP: $86.86
You Save: $45.14 (52%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 2 S
Fits the following Buick Models:
- Enclave | 2018-2024 | Avenir, Base, Essence, Preferred, Premium | 6 Cyl 3.6 L GAS
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Buick Oxygen Sensor Part Number: 55572993
$47.08 MSRP: $98.02
You Save: $50.94 (52%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1)
Fits the following Buick Models:
- Encore | 2013-2021 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Oxygen Sensor Part Number: 12576131
$51.58 MSRP: $107.40
You Save: $55.82 (52%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
Fits the following Buick Models:
- LaCrosse | 2005-2006 | CX, CXL | 6 Cyl 3.8 L GAS
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Buick Oxygen Sensor Part Number: 12594452
$54.19 MSRP: $112.82
You Save: $58.63 (52%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
Fits the following Buick Models:
- Enclave | 2008 | CX, CXL | 6 Cyl 3.6 L GAS
- Lucerne | 2010-2011 | CX, CXL, CXL Special Edition | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
- Terraza | 2006-2007 | CX, CXL | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
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Buick Oxygen Sensor Part Number: 12683553
$54.34 MSRP: $113.14
You Save: $58.80 (52%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12627140
Fits the following Buick Models:
- LaCrosse | 2018-2019 | Base, Essence, Preferred, Premium | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV)
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Buick Oxygen Sensor Part Number: 12569429
$54.71 MSRP: $113.90
You Save: $59.19 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1)
Fits the following Buick Models:
- Terraza | 2005 | CX, CXL | 6 Cyl 3.5 L GAS
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Buick Oxygen Sensor Part Number: 12559850
$59.96 MSRP: $124.82
You Save: $64.86 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
Fits the following Buick Models:
- Century | 2001-2005 | Custom, Limited, Special Edition | 6 Cyl 3.1 L GAS
- Rendezvous | 2002-2005 | CX, CX Plus, CXL, CXL Plus | 6 Cyl 3.4 L GAS
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Buick Oxygen Sensor Part Number: 19178958
$61.65 MSRP: $128.36
You Save: $66.71 (52%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor; Manifold
- Replaces: 25312211, 25164488, 25312203, 25178022
Fits the following Buick Models:
- Century | 1997-2000 | Custom, Limited | 6 Cyl 3.1 L GAS
- LeSabre | 1997-2003 | Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1997-2004 | Base, Ultra | 6 Cyl 3.8 L GAS
- Regal | 1997-2003 | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
- Riviera | 1997-1999 | Base | 6 Cyl 3.8 L GAS
- Skylark | 1997-1998 | Custom, Gran Sport, Limited | 6 Cyl 3.1 L GAS
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Buick Heated Oxygen Sensor Part Number: 12701634
$72.08 MSRP: $128.72
You Save: $56.64 (44%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor
- Replaces: 12663317
Fits the following Buick Models:
- Encore | 2016-2022 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Oxygen Sensor Part Number: 19178938
$63.56 MSRP: $132.32
You Save: $68.76 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors
- Replaces: 25165314, 25161152, 25312185
Fits the following Buick Models:
- LeSabre | 1993 | Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1993 | Base, Ultra | 6 Cyl 3.8 L GAS
- Regal | 1993 | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
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Buick Oxygen Sensor Part Number: 19178930
$66.41 MSRP: $138.26
You Save: $71.85 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
- Replaces: 25165313, 25312184, 25171579
Fits the following Buick Models:
- Century | 1994-1996 | Custom, Limited, Special | 4 Cyl 2.2 L GAS, 6 Cyl 3.1 L GAS
- Commercial Chassis | 1994-1996 | Base | 8 Cyl 5.7 L GAS
- LeSabre | 1994-1996 | Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1994-1996 | Base, Ultra | 6 Cyl 3.8 L GAS
- Regal | 1993-1996 | Custom, Gran Sport, Limited, Olympic Gold Edition | 6 Cyl 3.1 L GAS, 6 Cyl 3.8 L GAS
- Riviera | 1995-1998 | Base | 6 Cyl 3.8 L GAS
- Roadmaster | 1994-1996 | Base, Collector's Edition, Estate Wagon, Estate Wagon Collector's Edition, Limited, Limited Collector's Edition | 8 Cyl 5.7 L GAS
- Skylark | 1994-1996 | Custom, Gran Sport, Limited, Olympic Gold Edition | 6 Cyl 3.1 L GAS
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Buick Oxygen Sensor Part Number: 19178924
$68.05 MSRP: $141.66
You Save: $73.61 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Replaces: 12587214, 19178921, 25161130, 25312196, 25312207, 25164983
Fits the following Buick Models:
- Century | 1996-1999 | Custom, Limited, Special | 4 Cyl 2.2 L GAS, 6 Cyl 3.1 L GAS
- LeSabre | 1996-2003 | Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1997-2004 | Base, Ultra | 6 Cyl 3.8 L GAS
- Regal | 1996-1999 | 25th Anniversary Edition, Custom, GS, Gran Sport, LS, Limited, Olympic Gold Edition | 6 Cyl 3.8 L GAS
- Rendezvous | 2002-2005 | CX, CX Plus, CXL, CXL Plus | 6 Cyl 3.4 L GAS
- Riviera | 1996-1999 | Base | 6 Cyl 3.8 L GAS
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Buick Oxygen Sensor Part Number: 12616125
$69.02 MSRP: $143.68
You Save: $74.66 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
Fits the following Buick Models:
- Enclave | 2009-2011 | CX, CXL | 6 Cyl 3.6 L GAS
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Buick Oxygen Sensor Part Number: 12616502
$73.54 MSRP: $153.12
You Save: $79.58 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1)
- Replaces: 12617648
Fits the following Buick Models:
- LaCrosse | 2010-2016 | Base, CX, CXL, Convenience, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Regal | 2011-2017 | Base, CXL, GS, Premium | 4 Cyl 2.0 L FLEX, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Verano | 2012-2017 | Base, Convenience, Leather, Premium, Sport Touring, Turbo | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
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Buick Oxygen Sensor Part Number: 12640115
$109.45 MSRP: $195.44
You Save: $85.99 (44%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
Fits the following Buick Models:
- Regal | 2011-2013 | CXL, GS, Premium | 4 Cyl 2.0 L FLEX
- Verano | 2015-2016 | Premium | 4 Cyl 2.0 L GAS
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Buick Oxygen Sensor Part Number: 12585999
$93.88 MSRP: $195.44
You Save: $101.56 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
Fits the following Buick Models:
- Rainier | 2006-2007 | CXL | 6 Cyl 4.2 L GAS
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Buick Oxygen Sensor Part Number: 55570074
$37.14 MSRP: $75.44
You Save: $38.30 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2)
Fits the following Buick Models:
- Cascada | 2016-2019 | Base, Premium, Sport Touring | 4 Cyl 1.6 L GAS
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Buick Oxygen Sensor Part Number: 12592591
$39.35 MSRP: $79.91
You Save: $40.56 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
Fits the following Buick Models:
- Rainier | 2006-2007 | CXL | 6 Cyl 4.2 L GAS

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Buick Oxygen Sensor

Choose OEM Oxygen Sensor, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Buick's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Buick Oxygen Sensor. You can shop at highly competitive prices and protect your budget. All our genuine Buick parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

Buick Oxygen Sensor is applied to trim the emissions and make the most of the fuel balance to make daily driving easier and less polluted. Since 1903, Buick has pursued the quality of the hush and ride rather than empty flash and found that quiet cabin combined with fast steering can be on the same road. To achieve this, the marque continues to perfect QuietTuning to allow wind to roar away, leaving normal conversation at the pace of highway traffic. The Wildcat EV concept demonstrates that the sharp sheet metal and battery power are the next mixing style and responsibility. Heritage grilles are retained, but dashboards are simple to allow the drivers to locate controls quickly. Devotees will appreciate the fact that Buick suspension levels off rough pavement and seats do not develop couch-potato qualities. The Oxygen Sensor is in the exhaust line that reads unspent oxygen with a zirconium dioxide tip and a platinum coating, which pumps the voltage that the engine computer translates to fast fuel-trim adjustments to make each engine stroke use the proper amount of fuel and nothing more comes out the tailpipe. Later models operate with two sensors, one in front of and the other behind the catalytic converter, to enable the system to triple-check the state of the catalysts and blast the doors on any increase in dangerous gases. A newer wideband Oxygen Sensor expands the measurement range, which clears off data quality during both hard throttle and idle.

Buick Oxygen Sensor Parts and Q&A

Oxygen Sensor
12616125
Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 1 on Buick Enclave?
A:
The vehicle needs to be securely raised while keeping it in position for heated Oxygen Sensor (HO2S) for bank 1 sensor 1 replacement. Use a wrench to remove the retainer between the ho2s electrical connector and engine wiring harness electrical connector and disconnect both components from each other. The Exhaust Manifold should receive the removal of ho2s. Anti-seize compound gm p/n 12377953 or its equivalent should be used to coat the threads during installation when using an existing sensor because ho2s threads contain a unique compound of liquid graphite with glass beads which helps future sensor removal. Fit the ho2s onto the Exhaust Manifold while using a torque of 42 nm (31 lb ft). Together with engine wiring harness attach the connector to the ho2s electrical connector before fastening the engine wiring harness clip to the ho2s electrical connector retainer. Finally, lower the vehicle.
Oxygen Sensor
19178747
Q: How to Replace a Heated Oxygen Sensor (HO2S) with an Oxygen Sensor Wrench on Buick Regal?
A:
For heated Oxygen Sensor (HO2S) replacement start by collecting these tools: Oxygen Sensor wrench (J 39194). Oxygen Sensor wrench (J 39194). The in-line electrical connector and the louvered end of the ho2s and Oxygen Sensor require special handling for cleansing from soil and oil substances while any cleaning solvents must be avoided. Start by uninstalling the fuel injector sight shield first. When engine temperature falls below 48°c (120°F) the Oxygen Sensor becomes hard to remove because excessive force could break the Exhaust Manifold or Exhaust Pipe threads. Separate the ho2s electrical cpa retainer while you disconnect the ho2s wiring harness from its electrical connector. Use the Oxygen Sensor wrench (J 39194) to carefully take the ho2s out of the right Exhaust Manifold. Placing the rear Oxygen Sensor into the right Exhaust Manifold requires a special anti-seize compound which should be applied to reused sensor threads using p/n 12377953 or equivalent. Use the Oxygen Sensor wrench (J 39194) to torque the ho2s to 41 n.m (30 lb ft) before reconnecting ho2s electrical connector to its bracket and installing the electrical connector retainer after attachment of the harness electrical connector. Then reinstall the fuel injector sight shield.