Delphi ES20356 Oxygen Sensor - Rear

Delphi ES20356 Rear Oxygen Sensor

The Delphi ES20356 is a heated rear oxygen sensor built for emission control service on select Honda Civic and Acura ILX applications. It uses a 4-wire design, square connector, and 18 x 1.5 mm thread size for direct replacement in the rear sensor position.

Key Features

• Heated oxygen sensor for rear position service
• 4-wire configuration with square connector shape
• 18 x 1.5 mm thread size
• Overall length: 350.0
• Includes oxygen sensor and instruction sheet
• Delphi ES20356 replacement for emission control repair

Application Details

Compatible with 2006-2015 Honda Civic, rear, and 2013-2014 Acura ILX, rear. This Delphi ES20356 oxygen sensor is built from Delphi’s OE experience and aftermarket engineering knowledge, bringing the same type of fit and function expected in rear oxygen sensor service. It cross-references Bosch 13961 for the same application.

What It Helps Fix

• Check engine light related to rear oxygen sensor performance
• Incorrect exhaust oxygen readings at the rear sensor location
• Emission control faults tied to sensor response or heater circuit issues
• Fuel trim problems caused by a failing downstream sensor
• Inspection failures linked to oxygen sensor malfunction

Installation Notes

Verify rear sensor placement before installation and confirm the connector shape, wire count, and thread size match the original part. Use the included instruction sheet during replacement, and inspect the harness routing and exhaust threads for damage before tightening the new sensor.

Quality Assurance

Delphi builds this replacement sensor using OE heritage and supplier experience developed through work with major automakers. That background supports consistent fitment and dependable emission control service for Honda Civic and Acura ILX rear oxygen sensor applications.