Walker 250-24493 Oxygen Sensor

Walker Products OE Oxygen Sensor for Audi, Volkswagen, and Bentley

Walker Products OE 250-24493 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for select Audi A8 Quattro, Volkswagen Touareg, Volkswagen R32, Audi Allroad Quattro, and Bentley Continental applications. It is built for downstream placement and provides the ECU with the feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor with specific-fit application coverage
• Downstream sensor position for targeted exhaust monitoring
• 4-wire design with male connector and radiused polygon connector shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 57.6; overall length: 61.14
• Walker Products OE part number 250-24493 for select European vehicles

Product Details

Walker Products OE 250-24493 is engineered for the exact sensor location and vehicle configuration required by the ECU. As a heated oxygen sensor, it helps maintain accurate exhaust feedback after warm-up, supporting proper air-fuel management and emissions system operation. Walker Products OE focuses on application-specific replacement parts, and this sensor follows that approach for downstream use on 2003-2009 Audi A8 Quattro, 2004-2007 Volkswagen Touareg, 2004 Volkswagen R32, 2003 Audi Allroad Quattro, and 2003 Bentley Continental applications. The part number 250-24493 is also a useful reference when verifying the correct downstream oxygen sensor for these vehicles.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures to ISO 9001/TS 16949 standards. This part cross-references Bosch 17014 and Denso 234-9005 for the same application.

Common Issues This Sensor Can Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Elevated exhaust emissions from a failing downstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

• Confirm the exact position before ordering: downstream, downstream left, downstream front, or downstream right depending on the vehicle.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Verify thread size and connector style against the original sensor to ensure proper fitment.
• Use the vehicle VIN and engine configuration when checking 2007 Audi A8 Quattro fitment, since coverage varies by chassis break.
• After installation, clear stored fault codes and confirm the ECU reads the new sensor correctly.

Quality Assurance

Walker Products OE 250-24493 is manufactured as an OE replacement sensor for specific vehicle applications and built to provide the diagnostic feedback expected by the ECU. Walker Products’ ISO 9001/TS 16949 manufacturing standards support consistent fit and function across the listed Audi, Volkswagen, and Bentley applications.