Delphi ES20177 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi Heated Oxygen Sensor ES20177

Delphi ES20177 is a heated oxygen sensor built for rear exhaust monitoring on select Audi and Volkswagen applications. It uses a 4-wire design, flat connector shape, and 18 x 1.5 mm thread size, with a 1500 mm overall length for the listed vehicle positions.

Key Features

• Heated oxygen sensor for rear exhaust positions
• 4-wire configuration with flat connector shape
• 18 x 1.5 mm thread size
• 1500 mm overall length
• Includes oxygen sensor and instruction sheet
• OE-focused engineering backed by Delphi’s long history supplying automakers

Application Details

Compatible with rear oxygen sensor locations on select Audi A8 Quattro and Volkswagen models, including rear left and rear right positions where specified. This Delphi ES20177 oxygen sensor is listed for 2005-2009 Audi A8 Quattro, 2004-2006 Volkswagen Phaeton, 2004-2006 Volkswagen Touareg, 2002-2005 Volkswagen Golf, 2002-2004 Volkswagen Jetta, 2002-2004 Volkswagen Passat, and 2004 Volkswagen R32. For the exact position on your vehicle, refer to the application details.

This part cross-references Bosch 16982 for the same application.

What This Sensor Helps Address

• Check engine light related to rear oxygen sensor faults
• Incorrect exhaust oxygen readings from a worn sensor
• Fuel trim issues caused by slow sensor response
• Emissions test failures tied to sensor performance
• Driveability concerns linked to aging heated O2 sensor operation

Installation Notes

Verify the rear, rear left, or rear right position before ordering, since fitment varies by vehicle and engine configuration. Match the 1500 mm overall length, 4-wire layout, flat connector, and 18 x 1.5 mm thread size to the original sensor. Compare the connector routing and sensor placement on the vehicle before installation.

Quality Assurance

Delphi builds this replacement sensor using OE heritage and engineering knowledge developed through more than 100 years of original-equipment experience. That background supports consistent fitment and sensor design for the listed Audi and Volkswagen applications.