Bosch 12009 oxygen sensor for the 1987-1990 Jeep Cherokee 6-cylinder 4.0L and other vehicles measures the oxygen in the exhaust and sends that signal to the ECU. This upstream Bosch O2 sensor is a heated, narrow-band, switching-type unit that gives the ECU air-fuel-ratio readings for combustion control.
- Reaches operating temperature in under 10 seconds for quick closed-loop control and cold-start performance
- Metal housing and TSP coating resist vibration, corrosion and contamination
- Withstands exhaust gas temperatures up to 1,880°F
- Advanced ceramic element and optimized heater control for consistent readings under heat and vibration
Quick facts
- Part: Bosch 12009 oxygen sensor
- Fits: 1987-1990 Jeep Cherokee 6-cylinder 4.0L and other vehicles
- Position: Upstream
- Material: Metal (housing)
- Condition: New
A check engine light, rough running or poor fuel economy can mean the sensor is worn, though an exhaust leak or a wiring fault can sit behind the same signs. If the sensor is the cause, this one replaces it.
Fits
The 1987-1990 Jeep Cherokee 6-cylinder 4.0L, the 1988-1990 Jeep Wagoneer 6-cylinder 4.0L, the 1988-1989 Eagle Premier 4-cylinder 2.5L and the 1988-1990 Premier V6 3.0L take this upstream sensor, one per vehicle, and so do many other vehicles. This listing is one sensor.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
- Hex size: 22 mm
- Length (sealing surface to end of connector): 10.8 in
Build and materials
- Type: Narrow-band heated, switching-type
- Heated: Yes
- Housing material: Metal
- Condition: New
- Warranty: Bosch 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks
In the box
One oxygen sensor with its wiring harness. A mounting bracket is not included.
Installation notes
- Direct-fit connectors for quick installation.
- Conductive anti-seize is pre-applied to the threads.
Frequently Asked Questions
Is this the right oxygen sensor for a 1987-1990 Jeep Cherokee 6-cylinder 4.0L?
Yes, Bosch 12009 fits the 1987-1990 Jeep Cherokee 6-cylinder 4.0L; for any other car, look it up in the "Vehicles it fits" section to see whether it takes this sensor.
Is this Bosch premium oxygen sensor heated?
Yes. This upstream Bosch 12009 is a heated narrow-band sensor with an integrated heater element, and it reaches operating temperature in under 10 seconds.
Does this oxygen sensor come with a wiring harness or a mounting bracket?
The wiring harness is included. A mounting bracket is not part of this listing.
What thread size and hex size does the Bosch 12009 sensor have?
The thread size is M18 - 1.5 and the hex size is 22 mm. Length from the sealing surface to the end of the connector is 10.8 in.
Does Bosch warrant this oxygen sensor?
Yes. Bosch gives its oxygen sensors a 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks.
