Delphi ES20415 Oxygen Sensor - Rear or Rear Right

Delphi ES20415 Oxygen Sensor Overview

The Delphi ES20415 is a heated oxygen sensor built for rear and rear right applications on select Toyota Sienna models. It uses a 4-wire design with a flat connector and 18 x 1.5 mm thread size for direct-fit replacement service.

Backed by Delphi’s OE heritage and more than a century of original-equipment experience, this oxygen sensor reflects the engineering knowledge Delphi supplies to major automakers and carries that same approach into the aftermarket.

Key Features

• Heated oxygen sensor for exhaust monitoring
• 4-wire configuration for the listed applications
• Flat connector shape for vehicle-specific connection fit
• 18 x 1.5 mm thread size
• Overall length: 545.0
• Includes oxygen sensor and instruction sheet
• Position-specific fitment for rear and rear right locations

Fitment and Application

Compatible With 2011-2014 Toyota Sienna, rear right. Fits 2015 Toyota Sienna, rear right, to 09/2014. Fits 2011-2012 Toyota Sienna, rear.

This part cross-references Bosch 18047 for the same application.

Search terms commonly used for this part include Toyota Sienna rear right oxygen sensor, 2011-2014 Toyota Sienna heated O2 sensor, and Delphi ES20415 rear oxygen sensor replacement.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect exhaust oxygen readings at the rear sensor location
• Fuel control issues caused by a failing heated sensor
• Emissions test failures tied to sensor response problems
• Connector or thread-matched replacement needs on listed Toyota Sienna applications

Installation Notes and Tips

Verify the exact rear or rear right position before ordering, since the application varies by model year. Confirm the connector shape, wire count, and thread size against the original sensor, and follow the vehicle service procedure for removal and installation.

Quality Assurance

Delphi builds aftermarket parts using OE experience and engineering knowledge developed through long-term supplier relationships with major automakers. The ES20415 is produced to support the fit and function expected for the listed Toyota Sienna applications.