What tools are required to replace the Heated Oxygen Sensor (HO2S) 1, and what are the steps involved in the process on Buick LeSabre?

The replacement of heated Oxygen Sensor (HO2S) 1 requires an Oxygen Sensor wrench (J 39194) tool for the task. Start by unsecured the fuel injection sight shield before cutting the ignition power supply. Begin by disconnecting the ho2s retaining clip from the bracket. After that disconnect the ho2s electrical connector tab from the retaining clip then remove the electrical connector retainer. Use the Oxygen Sensor wrench (J 39194) to unscrew the sensor whereas the vehicle sits on stands before extracting the rear Oxygen Sensor carefully from the rear Exhaust Manifold. An Oxygen Sensor removal becomes more challenging when temperatures exceed 48°c (120°F). Installation of the rear Oxygen Sensor requires manual insertion into the rear Exhaust Manifold with special anti-seize compound applied to threads either from new sensor components or your alternative p/n 5613695 compound. The sensor coating procedure requires anti-seize compound p/n 5613695 or equivalent for reused sensors but new service sensors arrive with this compound already applied. Mount the rear ho2s by applying 41 n.m (30 lb ft) torque before lowering the vehicle and reattaching the ho2s electrical connector. Connect the ho2s electrical connector tab to the bracket followed by the electrical connector retainer installation alongside reinstallation of the fuel injection sight shield.

OEM Buick LeSabre Oxygen Sensor

Oxygen O2 Sensor

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7 Oxygen Sensors found

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Buick LeSabre Oxygen Sensor Part Number: 19209814
$59.22 MSRP: $120.28
You Save: $61.06 (51%)
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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:
- 2004-2005 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Oxygen Sensor Part Number: 19209807
$87.79 MSRP: $178.30
You Save: $90.51 (51%)
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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:
- 2004-2005 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Oxygen Sensor Part Number: 19178958
$65.65 MSRP: $133.34
You Save: $67.69 (51%)
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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 LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Oxygen Sensor Part Number: 19178938
$63.56 MSRP: $129.10
You Save: $65.54 (51%)
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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 LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Oxygen Sensor Part Number: 19178930
$66.41 MSRP: $134.88
You Save: $68.47 (51%)
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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:
- 1994-1996 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Oxygen Sensor Part Number: 19178924
$71.63 MSRP: $145.48
You Save: $73.85 (51%)
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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:
- 1996-2003 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre 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:
- 1986-1993 Buick LeSabre | Base, Custom, Limited, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS

Buick LeSabre Oxygen Sensor

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The Oxygen Sensor is one of those components that confirm the rather dependable and performing Buick LeSabre models line, manufactured from 1959 to 2005. This Oxygen Sensor is substantially important in checking the air/fuel ratio within the engine exhaust to offer the required performance while, at the same time, contributing to minimal emissions. Oxygen that is not burned is sensed and it also provides a voltage signal that tells the engine control computer of the Buick LeSabre that it should alter the fuel injector pulse width so as to make the car to operate in a closed loop efficiently. Commonly, Buick LeSabre cars come with at least two Oxygen Sensors that are positioned ahead of the catalytic converter and further downstream of it with ensuring more efficiency and safety. Out of these two, upstream sensor is significant more because it gives primary feedback for efficient operation of the catalytic converter. This component is known as Oxygen Sensor which stays for a quite longtime endures high temperature and degrades and that causes high emissions and lower fuel economy. The Oxygen Sensor has a number of features; these include the sensing of a wide range of engine conditions while its primary application is the optimizing of LeSabre oxygen sensors. With such versatility and the long standing and comfortable rides that the Buick LeSabre is noted for, one can argue that the car rightfully holds its place in the market. In general, the Oxygen Sensor is one of the critical components for making the Buick LeSabre more efficient, safer, and performing optimally for its users hence being a remarkable feature in Buick LeSabre's history.

Buick LeSabre Oxygen Sensor Parts Questions & Experts Answers

Oxygen Sensor
19209814
Q: What tools are required to replace the Heated Oxygen Sensor (HO2S) 1, and what are the steps involved in the process on Buick LeSabre?
A:
The replacement of heated Oxygen Sensor (HO2S) 1 requires an Oxygen Sensor wrench (J 39194) tool for the task. Start by unsecured the fuel injection sight shield before cutting the ignition power supply. Begin by disconnecting the ho2s retaining clip from the bracket. After that disconnect the ho2s electrical connector tab from the retaining clip then remove the electrical connector retainer. Use the Oxygen Sensor wrench (J 39194) to unscrew the sensor whereas the vehicle sits on stands before extracting the rear Oxygen Sensor carefully from the rear Exhaust Manifold. An Oxygen Sensor removal becomes more challenging when temperatures exceed 48°c (120°F). Installation of the rear Oxygen Sensor requires manual insertion into the rear Exhaust Manifold with special anti-seize compound applied to threads either from new sensor components or your alternative p/n 5613695 compound. The sensor coating procedure requires anti-seize compound p/n 5613695 or equivalent for reused sensors but new service sensors arrive with this compound already applied. Mount the rear ho2s by applying 41 n.m (30 lb ft) torque before lowering the vehicle and reattaching the ho2s electrical connector. Connect the ho2s electrical connector tab to the bracket followed by the electrical connector retainer installation alongside reinstallation of the fuel injection sight shield.