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Delphi ES20384 Oxygen Sensor - Rear
| Brand | Delphi ES20384 |
|---|---|
| Position | Rear |
| Connector Shape | Square |
| Overall Length | 1265.0 |
| Package Contents | Oxygen Sensor, Instruction Sheet |
| Sensor Type | Heated |
| Thread Size | 18 x 1.5 mm |
| Wire Quantity | 4 |
| Fits | Chevrolet and Pontiac · 6 vehicles |
Heated sensor. Delivers faster operation for more responsive emissions monitoring.
Square connector. Simplifies installation with a straightforward electrical connection.
OE heritage. Built with decades of original-equipment experience.
Cross-references Bosch 13111, Bosch 13483 and DENSO Auto Parts 234-4089 for the same application. See all 18.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Rear Oxygen Sensor for Chevrolet Cavalier and Pontiac Sunfire
Delphi ES20384 is a heated rear oxygen sensor built for direct-fit emission control service on select Chevrolet Cavalier and Pontiac Sunfire applications. It uses a 4-wire design, square connector, and 18 x 1.5 mm thread size for OE-style replacement where the rear sensor is specified.
Key Features
- Heated oxygen sensor for rear position service
- 4-wire configuration for signal and heater circuit operation
- Square connector shape for application-specific fitment
- 18 x 1.5 mm thread size
- Overall length: 1265.0
- Includes oxygen sensor and instruction sheet
- Delphi ES20384 replacement part number
Detailed Description
Delphi ES20384 is an emission control oxygen sensor engineered for rear sensor replacement on 1999-2001 Chevrolet Cavalier and 1999-2001 Pontiac Sunfire models. Delphi draws on OE heritage and supplier experience from the original equipment side, bringing that knowledge into aftermarket sensor construction. This rear oxygen sensor is a practical choice when servicing the exhaust feedback system on a Chevrolet Cavalier or Pontiac Sunfire with the specified rear sensor location.
This part cross-references Bosch 13111 and DENSO Auto Parts 234-4089 for the same application.
What It Helps Address
- Check engine light related to rear oxygen sensor performance
- Incorrect exhaust oxygen feedback readings
- Heater circuit faults in the rear sensor
- Emissions test failures tied to sensor response issues
- Driveability concerns caused by inaccurate air-fuel feedback
Installation Notes and Tips
Fits 1999-2001 Chevrolet Cavalier, rear. Fits 1999-2001 Pontiac Sunfire, rear. Confirm the rear sensor location before ordering, and match the connector shape, wire count, and thread size to the original part. Use the included instruction sheet during installation and verify the harness routing and exhaust clearance after replacement.
Quality Assurance
Delphi builds this sensor with OE-based engineering knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment and sensor design for emission control service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2001 | Chevrolet | Cavalier | Rear | — |
| 2001 | Pontiac | Sunfire | Rear | — |
| 2000 | Chevrolet | Cavalier | Rear | — |
| 2000 | Pontiac | Sunfire | Rear | — |
| 1999 | Chevrolet | Cavalier | Rear | — |
| 1999 | Pontiac | Sunfire | Rear | — |
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