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Delphi ES20090 Oxygen Sensor - Rear
| Brand | Delphi ES20090 |
|---|---|
| Position | Rear |
| Connector Shape | Square |
| Overall Length | 465.0 |
| Package Contents | Oxygen Sensor, Instruction Sheet |
| Sensor Type | Heated |
| Thread Size | 18 x 1.5 mm |
| Wire Quantity | 4 |
| Fits | Jeep · 8 vehicles |
Heated sensor. Helps the oxygen sensor reach operating temperature quickly.
Square connector. Provides a straightforward electrical connection.
OE heritage. Built with decades of original-equipment experience.
Cross-references Bosch 13687, DENSO Auto Parts 234-4029 and DENSO Auto Parts 234-4768 for the same application. See all 21.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Delphi ES20090 Rear Oxygen Sensor
The Delphi ES20090 is a heated rear oxygen sensor built for precise exhaust monitoring on select Jeep applications. It uses a 4-wire design with a square connector and 18 x 1.5 mm thread size for direct-fit replacement service.
Fits 2001-2004 Jeep Grand Cherokee, rear, cylinders 4 through 6. Fits 2001-2004 Jeep Wrangler, rear, cylinders 4 through 6.
Key Features
- Heated oxygen sensor for faster operating temperature and stable signal output
- 4-wire configuration with square connector
- 18 x 1.5 mm thread size for the specified exhaust bung
- Overall length: 465.0
- Rear position application for select Jeep Grand Cherokee and Jeep Wrangler models
- Includes oxygen sensor and instruction sheet
Detailed Description
Delphi ES20090 is an emission control oxygen sensor engineered for rear-location use on 2001-2004 Jeep Grand Cherokee and 2001-2004 Jeep Wrangler models with cylinders 4 through 6. Delphi draws on OE experience and supplier knowledge from top automakers, and that background is reflected in the sensor design and aftermarket fitment. If you are replacing a rear oxygen sensor on a Jeep Grand Cherokee or Jeep Wrangler, the ES20090 provides the correct connector style, wire count, and thread specification for the listed applications.
This part cross-references Bosch 13687 for the same application.
Common Issues This Part May Address
- Check engine light related to rear oxygen sensor performance
- Fault codes tied to slow sensor response or heater circuit concerns
- Incorrect exhaust feedback affecting emissions monitoring
- Rough idle or drivability complaints caused by inaccurate air-fuel data
- Failed emissions inspection due to a worn rear O2 sensor
Installation Notes and Tips
Confirm rear sensor placement before installation and verify the connector shape, wire count, and thread size against the original part. Inspect the harness routing and exhaust bung condition before threading in the new sensor. Use the vehicle service information for torque and connector routing details, and clear diagnostic trouble codes after installation if required.
Quality Assurance
Delphi builds this oxygen sensor using OE heritage and application knowledge developed through long-term supplier experience with major automakers. The ES20090 is intended to meet the fit and function requirements of the listed Jeep Grand Cherokee and Jeep Wrangler rear sensor applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | Jeep | Grand Cherokee | Rear | Cylinders 4 through 6 |
| 2004 | Jeep | Wrangler | Rear | Cylinders 4 through 6 |
| 2003 | Jeep | Grand Cherokee | Rear | Cylinders 4 through 6 |
| 2003 | Jeep | Wrangler | Rear | Cylinders 4 through 6 |
| 2002 | Jeep | Grand Cherokee | Rear | Cylinders 4 through 6 |
| 2002 | Jeep | Wrangler | Rear | Cylinders 4 through 6 |
| 2001 | Jeep | Grand Cherokee | Rear | Cylinders 4 through 6 |
| 2001 | Jeep | Wrangler | Rear | Cylinders 4 through 6 |
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