Delphi ES20202 Oxygen Sensor - Rear

Delphi ES20202 Rear Oxygen Sensor

Delphi ES20202 is a heated rear oxygen sensor built for precise exhaust monitoring on select Lexus and Toyota applications. It uses a 4-wire design with a square connector and 18 x 1.5 mm thread size for direct-fit replacement service.

Key Features

• Heated oxygen sensor for rear exhaust position
• 4-wire configuration with square connector
• 18 x 1.5 mm thread size
• Overall length: 510.0
• Includes oxygen sensor and instruction sheet
• OE heritage backed by Delphi’s 100 years of original equipment experience

Detailed Description

Delphi ES20202 is an emission control sensor engineered for rear-position exhaust monitoring on 1999-2003 Lexus RX300, 2001-2003 Toyota Highlander, and 1993-1998 Toyota Supra, including 1993-1995 Toyota Supra with California Emission System. This rear oxygen sensor helps the engine control system read exhaust oxygen content so fuel delivery and emissions strategy can stay within expected operating range. Delphi’s OE background and supplier experience are reflected in the sensor design and aftermarket construction.

This part cross-references Bosch 13338 and DENSO Auto Parts 234-4215 for the same application. Search terms such as rear oxygen sensor for Lexus RX300, Toyota Highlander rear O2 sensor, and Toyota Supra rear oxygen sensor can help identify the correct replacement when matching the vehicle and position.

What It Is Used For

• Replacing a failed rear oxygen sensor on Lexus RX300, Toyota Highlander, or Toyota Supra
• Restoring exhaust feedback for engine management on rear sensor circuits
• Addressing oxygen sensor fault codes related to rear sensor performance
• Correcting drivability issues tied to inaccurate exhaust oxygen readings
• Supporting emissions system monitoring on compatible Toyota and Lexus vehicles

Installation Notes and Tips

Verify the rear sensor location, connector shape, wire count, and thread size before installation. Compare the original sensor length and connector style to Delphi ES20202 to confirm proper routing and fitment. Use the vehicle’s service information for torque specifications and connector handling procedures, and inspect the harness and exhaust bung condition before installing the new sensor.

Quality Assurance

Delphi builds this oxygen sensor using OE experience gained from supplying major automakers, with original-equipment knowledge carried into the aftermarket part design.