Walker 250-24174 Oxygen Sensor

OE Oxygen Sensor for Audi and Volkswagen

Walker Products OE oxygen sensor Part Number 250-24174 is a specific-fit heated sensor built for downstream applications on select Audi and Volkswagen models. It provides ECU feedback for emissions and fuel-control monitoring, making it a direct replacement choice for vehicles that need accurate exhaust data.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for the listed Audi A4, A4 Quattro, A6, A6 Quattro, and Volkswagen Passat applications
• 4-wire configuration with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 65.47 in.; overall length: 69.02 in.
• Walker Products OE line replacement for engine management and oxygen sensor service

Product Details

The Walker Products OE line focuses on application-specific engine management components, and this oxygen sensor is engineered for the exact fitment position required by the vehicle. Part Number 250-24174 is listed for downstream left, downstream right, downstream front, and downstream rear positions depending on the model, including 1996-1999 Audi A4 and A4 Quattro, 1998-1999 Audi A6 and A6 Quattro, and 1998-2000 Volkswagen Passat. For Audi A4 oxygen sensor replacement or Volkswagen Passat downstream oxygen sensor service, this part is built to match the original sensor location and ECU feedback requirements.

Walker Products has supplied engine management and oxygen/air-fuel sensors for decades, with ISO 9001/TS 16949 certified manufacturing and OE-style application coverage. Part Number 250-24174 is a practical choice when replacing a failed heated oxygen sensor on compatible Audi and Volkswagen vehicles.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel monitoring
• Higher exhaust emissions from a degraded downstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

• Confirm the exact position before installation: downstream left, downstream right, downstream front, or downstream rear, depending on the vehicle.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement.
• Verify the threaded mounting location and connector style match the original sensor.
• Use the vehicle service information for proper removal and installation procedures.

Quality Assurance

Walker Products OE sensors are manufactured as application-specific replacements and produced under ISO 9001/TS 16949 quality systems. This part number is built to deliver the diagnostic feedback expected by the ECU on the listed Audi and Volkswagen applications.