Delphi ES20105 Oxygen Sensor - Rear or Rear Right

Delphi ES20105 Oxygen Sensor Overview

The Delphi ES20105 is a heated oxygen sensor built for rear exhaust monitoring on select Dodge applications. It uses a 4-wire design, a square connector, and an 18 x 1.5 mm thread size for direct-fit replacement where specified.

Backed by Delphi’s OE heritage and more than a century of original-equipment experience, this oxygen sensor reflects the engineering knowledge used by major automakers. It is a practical choice for drivers servicing a Dodge Dakota, Dodge Durango, or Dodge Ram 1500 with the listed rear or rear-right positions.

Key Features

• Heated oxygen sensor for rear exhaust placement
• 4-wire configuration for the specified vehicle applications
• Square connector shape
• 18 x 1.5 mm thread size
• Overall length: 305.0
• Package contents: oxygen sensor and instruction sheet
• Fits rear and rear-right positions as listed in the application data

Detailed Description

The Delphi ES20105 oxygen sensor is engineered for vehicles that rely on rear O2 sensor feedback to monitor exhaust performance after the catalytic converter. For 2001-2002 Dodge Dakota rear and rear-right applications, 2001-2002 Dodge Durango rear-right with California Emission System, 2001-2002 Dodge Durango rear without California Emission System, and 2002 Dodge Ram 1500 rear-right with California Emission System, this part number provides the specified fitment and connector style. If you are searching for a rear oxygen sensor for a Dodge Dakota or a rear right oxygen sensor for a Dodge Durango, ES20105 is the cataloged match.

This part cross-references DENSO Auto Parts 234-4764 for the same application.

Common Issues It Can Address

• Check engine light related to rear oxygen sensor performance
• Incorrect exhaust feedback readings from a worn sensor
• Emissions test failures tied to oxygen sensor faults
• Reduced catalyst monitoring accuracy
• Driveability concerns caused by aging exhaust sensors

Installation Notes and Tips

Confirm the vehicle’s position before ordering, since this part is listed for rear and rear-right locations only. Verify the connector shape, wire count, and thread size against the original sensor before installation. For the 2001-2002 Dodge Dakota and 2001-2002 Dodge Durango applications, check whether the vehicle uses California Emission System equipment where noted in the fitment data.

Quality Assurance

Delphi draws on OE experience and supplier knowledge developed through work with major automakers, and that background is reflected in the ES20105 oxygen sensor design. The included instruction sheet supports proper replacement and setup.