Delphi ES20164 Oxygen Sensor - Front, Rear, Rear Left or Rear Right

Delphi ES20164 Oxygen Sensor Overview

The Delphi ES20164 is a heated oxygen sensor built for rear, rear left, rear right, and front applications on select Audi and Volkswagen models. It combines OE-based engineering with a 4-wire design, flat connector shape, and 18 x 1.5 mm thread size for direct replacement service on covered vehicles.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire configuration with flat connector shape
• 18 x 1.5 mm thread size
• 1690.0 overall length for listed applications
• Package includes the oxygen sensor and instruction sheet
• Position-specific coverage for rear, rear left, rear right, and front locations

Detailed Description

Delphi ES20164 is engineered from more than a century of OE experience and supplier knowledge used by major automakers. That OE heritage is reflected in the sensor’s construction and application coverage for Audi A4, A4 Quattro, A6, A6 Quattro, A8 Quattro, Allroad Quattro, RS6, S4, S6, S8, and Volkswagen Passat models. If you are replacing a worn sensor on a 2000-2005 Volkswagen Passat or a 2000-2004 Audi A6 Quattro, this part number provides the specified fitment and connector style for the listed positions.

This part cross-references Bosch 16073 and DENSO Auto Parts 234-4812 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings
• Reduced fuel economy caused by a failing sensor
• Rough idle or drivability issues tied to exhaust feedback
• Emissions test failures linked to sensor response problems

Installation Notes and Tips

Confirm the sensor position on your vehicle before ordering, since ES20164 is listed for rear, rear left, rear right, and front locations depending on application. Verify the 18 x 1.5 mm thread size, 4-wire connector layout, and 1690.0 overall length against the original part. Use the included instruction sheet during installation and inspect the harness routing to avoid strain or contact with hot exhaust components.

Quality Assurance

Delphi builds this oxygen sensor using OE-based engineering and application knowledge developed through long-term supplier experience with leading automakers. That background supports consistent fitment and service replacement for covered Audi and Volkswagen applications.