How should the Heated Oxygen Sensor (HO2S) and the Oxygen Sensor be handled and installed on Buick Regal?

The heated Oxygen Sensor (HO2S) along with the Oxygen Sensor both have a connector that is permanently attached to their pigtail and this attachment should not be taken apart because it can damage sensor operation and both devices need gentle handling to maintain clean electrical connections on the pigtail and louvered end and avoid cleaning agents or dropping occurrences. The extraction of the heated Oxygen Sensor demands special attention because engine temperatures below 48°c (120°F) will make it difficult to remove while using force could harm the Exhaust Manifold or pipe threads. Start by turning off the ignition before proceeding to remove the fuel injector sight shield for ho2s 1 replacement or raising the vehicle if replacing ho2s 2. Remove the electric wiring before steadily removing the heated Oxygen Sensor. Apply anti-seize compound p/n 5613695 to the heated Oxygen Sensor/catalyst monitor threads before installing the sensor which should be tightened to 41 n.m (30 lb ft). Return the electrical connector to its position alongside lowering the vehicle until you replace the sight shield for ho2s 1.

How to Replace a Heated Oxygen Sensor (HO2S) Without Damaging the Pigtail and Connector on Buick Regal?

Assessing a heated Oxygen Sensor (HO2S) requires several necessary tools including the Oxygen Sensor wrench (J 39194). Oxygen Sensor wrench (J 39194). The ho2s along with its Oxygen Sensor arrives with an integral pigtail and connector that users must not detach because damage to this equipment will degrade the sensor's ability to function properly. When handling the ho2s and o2s maintain cautious behavior to keep in-line electrical connectors and the louvered end free from dirt by cleaning them with no chemicals. The removal process starts by lifting up and holding the vehicle steady. Remove the retaining tab from the ho2s electrical connector then disconnect it. The Oxygen Sensor wrench (J 39194) helps extract the ho2s from its placement within the Exhaust Pipe. The Oxygen Sensor setup begins with Exhaust Pipe installation of the sensor while applying special anti-seize compound to the threads. New service oxygen sensors arrive with anti-seize compound already applied but reused sensors require anti-seize compound p/n 12377953 or its equivalent for coating application. Using the Oxygen Sensor wrench (J 39194) tighten the Oxygen Sensor until it reaches 41 n.m (30 lb ft). After connecting ho2s connector to ho2s electrical connector install the retaining tab to secure the connection then position the vehicle back to its original height.

OEM Buick Regal 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).

18 Oxygen Sensors found

View related parts
Buick Regal 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:
- 2003-2004 Buick Regal | GS, LS | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19178938
$63.56 MSRP: $129.10
You Save: $65.54 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors
- Replaces: 25165314, 25161152, 25312185
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
View related parts
Buick Regal 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:
- 2004 Buick Regal | GS, LS | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19178958
$61.65 MSRP: $125.22
You Save: $63.57 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor; Manifold
- Replaces: 25178022, 25312203, 25312211, 25164488
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2003 Buick Regal | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19178930
$66.41 MSRP: $134.88
You Save: $68.47 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
- Replaces: 25312184, 25165313, 25171579
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-1996 Buick Regal | Custom, Gran Sport, Limited, Olympic Gold Edition | 6 Cyl 3.1 L GAS, 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19178924
$68.05 MSRP: $138.20
You Save: $70.15 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; 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:
- 1996-1999 Buick Regal | 25th Anniversary Edition, Custom, Gran Sport, GS, Limited, LS, Olympic Gold Edition | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19178747
$83.90 MSRP: $151.86
You Save: $67.96 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors
- Replaced by: 19355307
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2004 Buick Regal | GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 12643707
$44.51 MSRP: $67.06
You Save: $22.55 (34%)
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:
- 2014-2017 Buick Regal | Base, GS, Premium, Sport Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 12640115
$93.88 MSRP: $190.68
You Save: $96.80 (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:
- 2011-2013 Buick Regal | CXL, GS, Premium | 4 Cyl 2.0 L FLEX
View related parts
Buick Regal 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:
- 2011-2017 Buick Regal | 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)
View related parts
Buick Regal Oxygen Sensor Part Number: 25176705
$17.28 MSRP: $212.15
You Save: $194.87 (92%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly, Oxygen; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1987 Buick Regal | Base, GNX, Grand National, Limited, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 6 Cyl 4.3 L DIESEL
View related parts
Buick Regal Oxygen Sensor Part Number: 12618011
$51.71 MSRP: $145.60
You Save: $93.89 (65%)
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:
- 2011 Buick Regal | CXL | 4 Cyl 2.4 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 25176708
$55.59 MSRP: $112.89
You Save: $57.30 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly, Oxygen; Sensor, Computer Control Sensors
- Replaces: 10096129
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Buick Regal | Custom, Limited | 6 Cyl 3.1 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 12661898
$63.01 MSRP: $127.99
You Save: $64.98 (51%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12643903
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2017 Buick Regal | Base, GS, Premium, Sport Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 12656543
$86.77 MSRP: $176.24
You Save: $89.47 (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: 12646200, 12639693
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2017 Buick Regal | Base, CXL, Premium | 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
View related parts
Buick Regal Oxygen Sensor Part Number: 19178117
Product Specifications
- Other Name: Sensor, Computer Control Sensors
- Replaces: 25164155, 25133737
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19178937
Product Specifications
- Other Name: Sensor, Computer Control Sensors
- Replaces: 25133791, 25312188
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Oxygen Sensor Part Number: 19211437
$19.00 MSRP: $33.92
You Save: $14.92 (44%)
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Sensor, Emission Control Sensor(Vehicle Speed); Sensor, Emission Control Sensor(Oxygen)
- 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:
- 1988-1993 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 2.8 L GAS, 6 Cyl 3.1 L GAS, 6 Cyl 3.8 L GAS

Buick Regal 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 Regal parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Buick Regal 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 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.

Buick Regal Oxygen Sensor Parts and Q&A

Oxygen Sensor
19178958
Q: How should the Heated Oxygen Sensor (HO2S) and the Oxygen Sensor be handled and installed on Buick Regal?
A:
The heated Oxygen Sensor (HO2S) along with the Oxygen Sensor both have a connector that is permanently attached to their pigtail and this attachment should not be taken apart because it can damage sensor operation and both devices need gentle handling to maintain clean electrical connections on the pigtail and louvered end and avoid cleaning agents or dropping occurrences. The extraction of the heated Oxygen Sensor demands special attention because engine temperatures below 48°c (120°F) will make it difficult to remove while using force could harm the Exhaust Manifold or pipe threads. Start by turning off the ignition before proceeding to remove the fuel injector sight shield for ho2s 1 replacement or raising the vehicle if replacing ho2s 2. Remove the electric wiring before steadily removing the heated Oxygen Sensor. Apply anti-seize compound p/n 5613695 to the heated Oxygen Sensor/catalyst monitor threads before installing the sensor which should be tightened to 41 n.m (30 lb ft). Return the electrical connector to its position alongside lowering the vehicle until you replace the sight shield for ho2s 1.
Oxygen Sensor
19209814
Q: How to Replace a Heated Oxygen Sensor (HO2S) Without Damaging the Pigtail and Connector on Buick Regal?
A:
Assessing a heated Oxygen Sensor (HO2S) requires several necessary tools including the Oxygen Sensor wrench (J 39194). Oxygen Sensor wrench (J 39194). The ho2s along with its Oxygen Sensor arrives with an integral pigtail and connector that users must not detach because damage to this equipment will degrade the sensor's ability to function properly. When handling the ho2s and o2s maintain cautious behavior to keep in-line electrical connectors and the louvered end free from dirt by cleaning them with no chemicals. The removal process starts by lifting up and holding the vehicle steady. Remove the retaining tab from the ho2s electrical connector then disconnect it. The Oxygen Sensor wrench (J 39194) helps extract the ho2s from its placement within the Exhaust Pipe. The Oxygen Sensor setup begins with Exhaust Pipe installation of the sensor while applying special anti-seize compound to the threads. New service oxygen sensors arrive with anti-seize compound already applied but reused sensors require anti-seize compound p/n 12377953 or its equivalent for coating application. Using the Oxygen Sensor wrench (J 39194) tighten the Oxygen Sensor until it reaches 41 n.m (30 lb ft). After connecting ho2s connector to ho2s electrical connector install the retaining tab to secure the connection then position the vehicle back to its original height.