Delphi ES20091 Oxygen Sensor - Front or Front Left

Delphi ES20091 Oxygen Sensor Overview

The Delphi ES20091 is a heated oxygen sensor built for precise exhaust monitoring and OE-style replacement performance. It uses a 4-wire design, a square connector, and an 18 x 1.5 mm thread size to match the listed applications, including Jeep Grand Cherokee, Dodge Dakota, Dodge Durango, and Dodge Ram 1500 coverage.

Backed by Delphi’s OE heritage and decades of supplier experience, this oxygen sensor is engineered with the application details needed for a direct-fit repair on the front or front-left position, depending on vehicle configuration.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire construction for the listed emission control applications
• Square connector shape for OE-style electrical connection
• 18 x 1.5 mm thread size for proper exhaust bung fitment
• 300.0 overall length for application-specific routing
• Package includes the oxygen sensor and instruction sheet
• Position-specific coverage for front and front left locations

Detailed Product Description

Delphi ES20091 is an emission control oxygen sensor designed for vehicles that require accurate exhaust feedback to the engine management system. It is listed for 2001-2004 Jeep Grand Cherokee, front left; 2001-2002 Dodge Dakota, front; 2001-2002 Dodge Durango, front; and 2002 Dodge Ram 1500, front, with California Emission System and without California Emission System. For the 2002 Dodge Durango, it also applies to front installations except Next Generation Engine Control Module configurations.

This part cross-references DENSO Auto Parts 234-4654 and Dorman - HELP 13716 for the same application. Delphi’s OE background is reflected in the sensor’s application-specific design, connector style, and thread specification, making Delphi ES20091 a practical replacement choice when servicing the listed Jeep Grand Cherokee and Dodge truck/SUV applications.

What This Sensor Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel mixture feedback to the engine control system
• Reduced fuel control accuracy from a worn upstream sensor
• Emission test failures tied to sensor response issues
• Driveability problems caused by slow or inconsistent exhaust readings

Installation Notes

Verify the vehicle’s exact position before ordering, since this part is listed for front and front-left locations depending on application. Confirm connector shape, wire count, thread size, and overall length against the original sensor before installation. For the 2002 Dodge Durango, review the Next Generation Engine Control Module note carefully, and for the 2002 Dodge Ram 1500, confirm whether the vehicle uses California Emission System or non-California Emission System calibration.

Use the application tab and vehicle identification details to confirm the correct placement on your Jeep Grand Cherokee, Dodge Dakota, Dodge Durango, or Dodge Ram 1500.

Quality Assurance

Delphi builds this oxygen sensor using OE heritage and knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment-focused replacement quality for the listed emission control applications.