Delphi ES20226 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20226 Oxygen Sensor Overview

Delphi ES20226 is a heated oxygen sensor built for rear exhaust monitoring on select Lexus and Toyota applications. It uses OE-based engineering from a supplier with long-standing original equipment experience, helping maintain accurate exhaust feedback for vehicles such as the Toyota Highlander and Lexus RX series.

Compatible With rear, rear left, and rear right positions depending on the vehicle application, this Delphi oxygen sensor supports precise replacement for common import fitments. The Delphi ES20226 is a direct-fit style service part for drivers addressing emissions-related sensor faults on covered Lexus RX330, RX350, RX400h, RX450h, and Toyota Highlander models.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design with square connector shape
• 18 x 1.5 mm thread size for listed applications
• 800.0 overall length for rear exhaust placement
• Includes oxygen sensor and instruction sheet
• OE heritage and application knowledge from Delphi

Detailed Product Description

The Delphi ES20226 oxygen sensor is engineered for rear exhaust locations where the engine control system monitors exhaust oxygen content after the catalytic converter. It is listed for rear right, rear left, and rear positions across select Toyota Highlander and Lexus RX applications, including 2004-2013 Toyota Highlander, 2004-2006 Lexus RX330, 2006-2008 Lexus RX400h, 2007-2014 Lexus RX350, and 2010-2014 Lexus RX450h. This part number, ES20226, is built to match the listed connector, thread, and wire configuration for the specified vehicles.

This part cross-references Bosch 15570 and DENSO Auto Parts 234-4502 for the same application.

Common Issues This Part Can Address

• Check engine light related to rear oxygen sensor performance
• Fault codes tied to slow sensor response or heater circuit problems
• Incorrect exhaust feedback affecting fuel control strategy
• Failed emissions inspection caused by a worn rear O2 sensor
• Sensor degradation from age, heat, and exhaust exposure

Installation Notes and Tips

Verify the exact position on your vehicle before ordering, since this sensor is listed for rear, rear left, and rear right locations depending on application. Confirm thread size, connector shape, wire count, and overall length against the original sensor before installation. For the best result, inspect the harness routing and exhaust threads for damage, and follow the included instruction sheet during replacement.

Quality Assurance

Delphi draws on more than 100 years of OE experience and original equipment knowledge when producing aftermarket parts. That OE background is reflected in the ES20226 oxygen sensor’s application-specific design and fitment-focused construction.