Delphi ES20050 Oxygen Sensor - Rear

Delphi ES20050 Rear Oxygen Sensor

The Delphi ES20050 is a heated rear oxygen sensor built for precise exhaust monitoring on select Chrysler, Dodge, and Mitsubishi applications. It uses a 4-wire design with a flat connector and 18 x 1.5 mm thread size for direct-fit replacement where specified.

Backed by Delphi’s OE heritage and decades of supplier experience, this oxygen sensor reflects the engineering knowledge used in original equipment development. It is a practical choice for drivers servicing rear sensor faults on vehicles such as the Chrysler Sebring, Dodge Avenger, and Mitsubishi Eclipse.

Key Features

• Heated oxygen sensor for rear position applications
• 4-wire configuration with flat connector shape
• 18 x 1.5 mm thread size
• Overall length: 630.0
• Includes oxygen sensor and instruction sheet
• Delphi part number ES20050

Detailed Description

Delphi ES20050 is an emission control oxygen sensor engineered for rear placement in supported vehicles. Its heated design helps the sensor reach operating temperature efficiently, supporting accurate exhaust feedback after startup and during normal driving. The flat connector and specified thread size help match OE-style fitment requirements on covered applications.

This part cross-references Bosch 13480 and DENSO Auto Parts 234-4083 for the same application. It fits 1995-1999 Chrysler Sebring, rear; 1995-1999 Dodge Avenger, rear; and 1995-1999 Mitsubishi Eclipse, rear. If you are replacing a rear oxygen sensor on a Chrysler Sebring, Dodge Avenger, or Mitsubishi Eclipse, ES20050 is the direct-fit reference to verify against your original sensor.

Common Problems It Can Address

• Check engine light related to rear oxygen sensor performance
• Incorrect exhaust feedback readings from a worn sensor
• Slow sensor response after warm-up
• Emissions test failures tied to oxygen sensor faults
• Rough fuel-control behavior caused by inaccurate exhaust data

Installation Notes and Tips

Confirm the rear sensor location, connector style, thread size, and overall length before installation. Compare the original sensor to the Delphi ES20050 to verify the flat connector and 4-wire layout match your vehicle’s harness and exhaust bung.

For best results, inspect the exhaust threads and wiring route before installing the new sensor. Use the included instruction sheet during replacement and ensure the sensor is seated correctly in the rear position on the supported Chrysler, Dodge, or Mitsubishi application.

Quality Assurance

Delphi builds aftermarket parts using OE experience and supplier knowledge developed through work with major automakers. That background is reflected in the ES20050’s application-specific design and replacement-focused construction.