Walker 250-25020 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Overview of Walker 250-25020 Oxygen Sensor for Audi A8 Quattro and Q7

The Walker Products OE 250-25020 oxygen sensor is designed specifically for Audi A8 Quattro and Q7 models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle’s engine management system.

• Heated oxygen sensor type for faster response times
• Specific fit for Audi A8 Quattro and Q7 models
• 72.36 inches wiring harness length for flexible installation
• 20 gauge wire measurement with 5 wires for reliable signal transmission
• Radiused polygon male connector for secure connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length of 75.91 inches for proper fitment

Detailed Features and Specifications

This Walker 250-25020 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving emissions control efficiency. The sensor includes a 72.36-inch wiring harness with 20 gauge wires and five individual wires, ensuring accurate and stable signal transmission. The radiused polygon male connector is designed for a secure and precise fit, reducing the risk of connection issues. The sensor mounts via a threaded connection with an 18.0 mm thread diameter, matching the OEM specifications for Audi A8 Quattro and Q7 vehicles. The overall length of 75.91 inches supports proper installation without strain on the wiring.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering direct-fit, OEM-quality emission control components. This oxygen sensor is part of that line, ensuring compatibility and performance that meet original equipment standards. Using a Walker Products OE sensor helps maintain factory-level emissions control and engine efficiency for Audi vehicles.

Common Applications and Problem Solving

• Restores accurate oxygen sensing for proper air-fuel mixture adjustment
• Resolves check engine light issues related to oxygen sensor faults
• Improves fuel economy by providing precise emissions data
• Reduces harmful exhaust emissions by maintaining sensor accuracy
• Prevents engine performance problems caused by faulty oxygen sensors

Installation Notes and Tips

When installing the Walker 250-25020 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the threads if recommended by the vehicle manufacturer. Carefully connect the radiused polygon male connector to the corresponding harness to avoid damage. Verify wiring harness routing to prevent contact with hot or moving engine parts. Proper installation will ensure reliable sensor operation and accurate emissions readings.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet or exceed OEM specifications for durability and performance. While specific warranty details for part number 250-25020 should be confirmed at the point of purchase, Walker typically offers coverage against defects in materials and workmanship to support long-term reliability in Audi A8 Quattro and Q7 applications.