How to test and replace an oxygen sensor?

The oxygen sensor is a device that produces a voltage when exposed to oxygen in the exhaust gases. It is in the exhaust system and can be heated internally for faster reaction. The sensor produces a voltage between zero and one volt, with a low voltage indicating a lean mixture and a high voltage indicating a rich mixture. The stoichiometric air to fuel ratio causes the voltage to fluctuate.

Genuine Cadillac Fleetwood Oxygen Sensor

Oxygen O2 Sensor

Enter your vehicle info to find more parts and verify fitment

Select Vehicle by VIN
Select Vehicle by Model

Select by VIN

Enter your VIN for the most accurate results.

Select by Model

-- Select Make --

-- Select Model --

-- Select Year --

3 Oxygen Sensors found

View related parts
Cadillac Fleetwood Sensor Asm,Heated Oxygen
Part Number: 19178930
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Replaces: 25171579, 25312184, 25165313
$51.99 MSRP: $123.78
You Save: $71.79 (58%)

Add to Cart
More Info
Fits the following Vehicles:
1994-1996 Cadillac Fleetwood | BROUGHAM, BROUGHAM 4 DOOR | 8 Cyl 5.7L
Less Info
View related parts
Cadillac Fleetwood Sensor Asm,Oxygen
Part Number: 19211435
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 25165116, 19178746, 19178940, 25106169, 25165119, 5613719, 05613719
$67.38 MSRP: $160.42
You Save: $93.04 (58%)

Add to Cart
More Info
Fits the following Vehicles:
1987-1990 Cadillac Fleetwood | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, FUNERAL COACH, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 8 Cyl 4.1L, 8 Cyl 4.5L
1982-1985 Cadillac Fleetwood | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR RWD, BROUGHAM 4 DOOR, BROUGHAM 4 DOOR RWD, FORMAL LIMOUSINE, LIMOUSINE | 8 Cyl 4.1L, 8 Cyl 6.0L
Less Info
View related parts
Cadillac Fleetwood Sensor,Exhaust Oxygen
Part Number: 19211437
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 19178952, 25162600, 25106073, 25132068, 25166816, 25171574, 25107378, 25162693, 25165118, 25171581, 25165120, 25171573, 19178943, 19178953, 19178919, 25162753, 25133185, 25133076
$18.54 MSRP: $33.26
You Save: $14.72 (45%)
More Info
Fits the following Vehicles:
1993 Cadillac Fleetwood | BROUGHAM 4 DOOR | 8 Cyl 5.7L
1982-1986 Cadillac Fleetwood | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 2 DOOR RWD, BROUGHAM 4 DOOR, BROUGHAM 4 DOOR FWD, BROUGHAM 4 DOOR RWD, FORMAL LIMOUSINE, FUNERAL COACH, LIMOUSINE, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 6 Cyl 4.1L, 8 Cyl 4.1L, 8 Cyl 5.0L
Less Info

Cadillac Fleetwood Oxygen Sensor Parts Questions & Answers

Sensor Asm,Heated Oxygen
19178930
Q: How to test and replace an oxygen sensor?
A: The oxygen sensor is a device that produces a voltage when exposed to oxygen in the exhaust gases. It is in the exhaust system and can be heated internally for faster reaction. The sensor produces a voltage between zero and one volt, with a low voltage indicating a lean mixture and a high voltage indicating a rich mixture. The stoichiometric air to fuel ratio causes the voltage to fluctuate.