Delphi ES20224 Oxygen Sensor - Front, Rear or Rear Right

Delphi ES20224 Oxygen Sensor Overview

The Delphi ES20224 oxygen sensor is a heated, 4-wire replacement sensor built for precise exhaust monitoring and reliable feedback to the engine control system. It is a direct-fit option for select Lexus and Toyota applications, including rear and rear-right positions on models such as the Lexus LS460, Lexus LS600h, Toyota Prius, Toyota Celica, Toyota Sienna, Lexus GS430, Lexus GS400, and Lexus SC300.

Built with Delphi’s OE heritage and decades of supplier experience, this oxygen sensor is made to match the electrical and physical requirements of the original application. The ES20224 part number is commonly searched for rear oxygen sensor replacement on Lexus LS460 rear right and Toyota Prius rear fitments.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design for common OE-style sensor configurations
• Square connector shape for application-specific harness matching
• 18 x 1.5 mm thread size for proper exhaust bung fitment
• 680.0 overall length for vehicle-specific routing
• Package includes the oxygen sensor and instruction sheet
• Fits front, rear, and rear-right positions depending on vehicle application

Detailed Description

Delphi ES20224 is an emission control oxygen sensor engineered for vehicles that rely on accurate exhaust oxygen readings to manage fuel delivery and emissions performance. As a heated sensor, it reaches operating temperature quickly, helping the engine control module receive consistent feedback sooner after startup. That makes it a practical replacement choice for drivers searching for a rear oxygen sensor for 2004-2009 Toyota Prius, a rear sensor for 2007-2013 Lexus LS460, or a rear-right sensor for 2008-2015 Lexus LS600h.

This part cross-references Bosch 13353 and DENSO Auto Parts 234-4139 for the same application. Delphi ES20224 is also referenced across multiple OE-style replacement listings for Lexus and Toyota exhaust sensor service.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback from a worn sensor
• Slow sensor response during cold starts
• Emissions test failures tied to sensor degradation
• Rough idle or drivability issues caused by inaccurate exhaust readings

Installation Notes and Tips

Confirm the exact position before ordering, since this sensor is listed for front, rear, and rear-right locations depending on the vehicle. Verify connector shape, thread size, and overall length against the original sensor before installation. For fitment-specific searches, this part is used on applications such as Fits 2004-2009 Toyota Prius, Rear; Fits 2007-2013 Lexus LS460, Rear; and Fits 2008-2015 Lexus LS600h, Rear Right.

Use the vehicle application data to match the correct sensor location on Lexus LS460, Toyota Celica, or Toyota Sienna models. Proper routing and connector alignment are important to avoid strain on the harness and to ensure accurate exhaust system readings.

Quality Assurance

Delphi draws on 100 years of OE experience and supplier knowledge from work with major automakers, and that OE background is reflected in the design and application matching of the ES20224 oxygen sensor. The result is a replacement part built around original-equipment fit and function expectations for select Lexus and Toyota vehicles.