Delphi ES20136 Oxygen Sensor - Rear

Rear Heated Oxygen Sensor for Honda and Acura

Delphi ES20136 is a rear heated oxygen sensor built for specific Honda and Acura applications. It uses a 4-wire design with a square connector and 18 x 1.5 mm thread size, making it a direct-fit replacement for rear sensor locations on listed vehicles.

Key Features

• Heated oxygen sensor for rear position use
• 4-wire configuration with square connector
• 18 x 1.5 mm thread size
• Overall length: 860.0
• Includes oxygen sensor and instruction sheet
• Delphi ES20136 replacement part number

Product Details

Delphi brings OE heritage and decades of original-equipment experience to this oxygen sensor. The ES20136 is engineered for rear exhaust monitoring on select Honda and Acura models, including the 2003-2004 Honda Pilot, 2001-2002 Acura MDX, 1999 Acura TL without California Emission System, 1998-1999 Honda Accord without California Emission System, 1997-1998 Acura CL, 1995-1997 Honda Accord, and 1996 Honda Prelude. This Delphi ES20136 sensor is a practical OE-style replacement when servicing rear emissions monitoring on these vehicles.

This part cross-references DENSO Auto Parts 234-4601 for the same application.

Common Issues This Part May Address

• Check engine light related to rear oxygen sensor performance
• Incorrect air-fuel feedback from a worn rear sensor
• Emissions test failure tied to oxygen sensor faults
• Slow or inconsistent sensor response in the exhaust stream
• Diagnostic trouble codes associated with rear O2 sensor circuits

Installation Notes and Tips

• Confirm rear sensor placement before ordering; this listing is for the rear position only.
• Verify thread size and connector shape against the original sensor.
• Inspect the harness routing and connector condition before installation.
• Use the included instruction sheet during replacement.
• Check vehicle emission configuration, including California Emission System notes where listed.

Quality Assurance

Delphi builds this sensor using OE experience and supplier knowledge developed through work with major automakers. The ES20136 is made to meet the fitment and functional requirements of the listed Honda and Acura rear oxygen sensor applications.