What is the function and maintenance of the exhaust oxygen sensor on Buick Regal?

The exhaust oxygen sensor, or 02S, is located in the exhaust pipe and aims to measure the amount of oxygen in the exhaust gas, Newer models of the sensor have a heated element different from the typical sensors. It functions to map the air/fuel mixture that is supplied to the engine, the oxygen that combines with the sensor to produce voltage, detectable by the ECM/PCM that ranges from 0.1 volt in high oxygen lean mixture to 0.9 volts in low lean oxygen. It is difficult to test the sensor when you don't have scan tools, and codes 44, 45 or 131-134 do not mean that the sensor is bad, as it can mean that such things as a dirty air filter of a vacuum leak. Due to the fact that the electrical pigtail and connector are installed permanently, contamination of this sensor is strictly prohibited. It is recommended that cleaning solvents should not be used and care should be taken not to damage the engines particularly if the actual temperature is less than 120F / 48C. There is a recommended application of a heat riser solvent every time the sensor is removed, and it should be changed after 30 000 miles The steps involved are finding the sensor, unclipping the electrical connector, applying of heat riser solvent and unscrewing the sensor. For installation, the new sensor's threads have to be protected by an electrically conductive anti-seize compound, and then the threads are to be tightened to 30 fl. lbs. Torque specified was confirmed without overtightening to 42 Nm and electrical connector was re connected in a way that the pigtail was not strained.

Genuine Buick Regal Oxygen Sensor

Oxygen O2 Sensor

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17 Oxygen Sensors found

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Buick Regal Heated Oxygen Sensor Assembly (Position 1)
Part Number: 12616502
$73.22 MSRP: $149.38
You Save: $76.16 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors
- Replaces: 12617648
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2017 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXL TURBO 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L, 4 Cyl 2.4L
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Buick Regal Sensor,Heated Oxygen
Part Number: 12559850
$59.70 MSRP: $121.78
You Save: $62.08 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2004 Buick Regal | CUSTOM, GL, GLX, GS, LIMITED, LS
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Buick Regal Heated Oxygen Sensor Assembly
Part Number: 19178924
$67.75 MSRP: $138.20
You Save: $70.45 (51%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Replaces: 25161130, 25312207, 12587214, 19178921, 25164983, 25312196
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-1998 Buick Regal | CUSTOM, GS, LIMITED, LS, REGAL | 6 Cyl 3.8L
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Buick Regal Heated Oxygen Sensor Assembly
Part Number: 19209814
$59.48 MSRP: $120.28
You Save: $60.80 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Replaces: 12574218
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004 Buick Regal | CUSTOM, GS, LS | 6 Cyl 3.8L
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Buick Regal Heated Oxygen Sensor Assembly
Part Number: 19178958
$61.38 MSRP: $125.22
You Save: $63.84 (51%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Manifold, Oxygen Sensor
- Replaces: 25178022, 25312203, 25312211, 25164488
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2003 Buick Regal | CUSTOM, GL, GLX, GS, LIMITED, LS, REGAL | 6 Cyl 3.8L
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Buick Regal Heated Oxygen Sensor Assembly
Part Number: 19178930
$66.12 MSRP: $134.88
You Save: $68.76 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Replaces: 25312184, 25165313, 25171579
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GRAN SPORT 4 DOOR, LIMITED 4 DOOR | 6 Cyl 3.1L, 6 Cyl 3.8L
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Buick Regal Sensor Assembly, Heated Oxygen (Post, Catal)
Part Number: 12640115
$93.47 MSRP: $190.68
You Save: $97.21 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2013 Buick Regal | CXL TURBO 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Sensor Assembly, Heated Oxygen(Pre, Catalyst Bank 1 Se)
Part Number: 12669867
$50.00 MSRP: $94.34
You Save: $44.34 (47%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Upper Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON | 4 Cyl 2.0L
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Buick Regal Sensor Assembly, Heated Oxygen (Pre, Catalyst B2S1)
Part Number: 12643707
$44.51 MSRP: $67.06
You Save: $22.55 (34%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors
- Replaces: 12627139
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2017 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Sensor Assembly, Heated Oxygen(Pre, Catalyst Bank 1 Se)
Part Number: 12669969
$38.53 MSRP: $72.70
You Save: $34.17 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 Buick Regal | 1SX 4 DOOR HATCHBACK | 6 Cyl 3.6L
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Buick Regal Heated Oxygen Sensor Assembly
Part Number: 19178747
$80.49 MSRP: $151.86
You Save: $71.37 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaced by: 19355307
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2003 Buick Regal | CUSTOM, GL, GLX, GS, LIMITED, LS | 6 Cyl 3.8L
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Buick Regal Sensor Assembly, Heated Oxygen (Post, Catalyst Bank 1 Sensor 2)
Part Number: 12661898
$63.28 MSRP: $127.99
You Save: $64.71 (51%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors
- Replaces: 12643903
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON, CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Oxygen Sensor Assembly
Part Number: 25176708
$59.84 MSRP: $112.89
You Save: $53.05 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 10096129
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GRAN SPORT 2 DOOR, GRAN SPORT 4 DOOR, LIMITED 2 DOOR, LIMITED 4 DOOR | 6 Cyl 3.1L
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Buick Regal Heated Oxygen Sensor Assembly (Position 2)
Part Number: 12618011
$51.49 MSRP: $145.60
You Save: $94.11 (65%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011 Buick Regal | CXL 4 DOOR SEDAN | 4 Cyl 2.4L
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Buick Regal Sensor Assembly, Heated Oxygen (Post, Catalyst Bank 1)
Part Number: 12656543
$87.15 MSRP: $176.24
You Save: $89.09 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly, Htd Oxy (Post, Catalyst Bank 1)
- Replaces: 12646200, 12639693
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2017 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN | 4 Cyl 2.4L
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Buick Regal Sensor,Exhaust Oxygen
Part Number: 19211437
$18.91 MSRP: $33.92
You Save: $15.01 (45%)
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 19178952, 25171573, 25166816, 25171574, 25162693, 25106073, 25107378, 25165118, 25171581, 25132068, 25165120, 25162600, 19178953, 19178943, 25133185, 25133076, 19178919, 25162753
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1992 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GRAN SPORT 2 DOOR, GRAN SPORT 4 DOOR, LIMITED, LIMITED 2 DOOR, LIMITED 4 DOOR, REGAL, STATION WAGON | 6 Cyl 2.8L, 6 Cyl 3.1L, 6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L
View related parts
Buick Regal Heated Oxygen Sensor Assembly
Part Number: 19178937
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 25133791, 25312188
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM 4 DOOR, GRAN SPORT 2 DOOR, GRAN SPORT 4 DOOR, LIMITED 4 DOOR | 6 Cyl 3.8L

Buick Regal Oxygen Sensor

The Oxygen Sensor encountered in Buick Regal vehicles is equally important in determining the amount of unburned oxygen in the exhaust so as to configure the ideal air-fuel mixture and the least emissions. It produces an electrical voltage which is proportional with the amount of oxygen and therefore the engine control computer can change the fuel injector pulse in accordance with the existing level of oxygen. The Buick Regal Company mostly uses two oxygen sensors, one before the catalytic converter the other after it while V6 or V8 vehicles have one more sensor for each cylinder. Zirconium dioxide oxygen sensors are used in most of the Buick Regal vehicles and comprises of narrow-band oxygen sensors and wide-band oxygen sensors. Narrow-band sensors give only rich/lean signal while on the other hand wide-band sensors give broader range of signals of air fuel mixture. They do not differ with regard to the nature of the information they deliver, however, wideband sensors offer more comprehensive operating principles. These devices wear out with time, get contaminated and if not replaced, they increase emission levels and reduce fuel consumption, therefore, should be replaced for enhanced vehicle performance.

Each OEM Buick Regal Oxygen Sensor we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Buick Regal Oxygen Sensor Parts Questions & Experts Answers

Oxygen Sensor Assembly
5613719
Q: What is the function and maintenance of the exhaust oxygen sensor on Buick Regal?
A:
The exhaust oxygen sensor, or 02S, is located in the exhaust pipe and aims to measure the amount of oxygen in the exhaust gas, Newer models of the sensor have a heated element different from the typical sensors. It functions to map the air/fuel mixture that is supplied to the engine, the oxygen that combines with the sensor to produce voltage, detectable by the ECM/PCM that ranges from 0.1 volt in high oxygen lean mixture to 0.9 volts in low lean oxygen. It is difficult to test the sensor when you don't have scan tools, and codes 44, 45 or 131-134 do not mean that the sensor is bad, as it can mean that such things as a dirty air filter of a vacuum leak. Due to the fact that the electrical pigtail and connector are installed permanently, contamination of this sensor is strictly prohibited. It is recommended that cleaning solvents should not be used and care should be taken not to damage the engines particularly if the actual temperature is less than 120F / 48C. There is a recommended application of a heat riser solvent every time the sensor is removed, and it should be changed after 30 000 miles The steps involved are finding the sensor, unclipping the electrical connector, applying of heat riser solvent and unscrewing the sensor. For installation, the new sensor's threads have to be protected by an electrically conductive anti-seize compound, and then the threads are to be tightened to 30 fl. lbs. Torque specified was confirmed without overtightening to 42 Nm and electrical connector was re connected in a way that the pigtail was not strained.