Walker 250-25118 Oxygen Sensor - Upstream or Upstream Left

Overview of Walker Products OE Oxygen Sensor 250-25118

The Walker Products OE Oxygen Sensor 250-25118 is designed specifically for select Audi, Porsche, and Volkswagen 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 with 5-wire configuration
• Specific fit for Audi, Porsche, and Volkswagen vehicles
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wiring harness length of 20.66 inches and overall length of 25.59 inches
• Wire gauge measurement of 20 for reliable signal transmission

Detailed Product Features and Specifications

This oxygen sensor from Walker Products OE features a heated sensor type that allows for faster warm-up times and improved emissions monitoring. The 5-wire design supports both sensor heating and signal output, enhancing durability and accuracy. The sensor’s threaded mounting type with an 18.0 mm diameter ensures a secure fit in the exhaust system. The radiused polygon male connector provides a precise and stable electrical connection, reducing the risk of signal loss or corrosion. With a wiring harness length of 20.66 inches and an overall length of 25.59 inches, this sensor is engineered to fit specific vehicle applications without modification.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor, part number 250-25118, is part of that line, ensuring compatibility and performance for vehicles such as the Audi A8 Quattro, Porsche 718 Boxster and 718 Cayman, and Volkswagen Beetle, Jetta, and Passat models. The OE line emphasizes precise fitment and reliable operation in emission control systems.

Compatible Vehicles and Common Applications

• Compatible with Audi A8 Quattro models requiring a specific heated oxygen sensor
• Designed for Porsche 718 Boxster and 718 Cayman for accurate emissions feedback
• Fits Volkswagen Beetle, Jetta, and Passat models with threaded oxygen sensor ports
• Used in emission control systems to monitor and regulate exhaust gases
• Helps maintain engine efficiency and reduce harmful emissions

Installation Notes and Tips

• Ensure the vehicle is cooled before sensor removal to avoid burns
• Use appropriate oxygen sensor socket or wrench for installation
• Verify connector type matches the vehicle’s wiring harness (radiused polygon male)
• Do not over-tighten; torque to manufacturer specifications for 18.0 mm thread
• Inspect wiring harness for damage before installation

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards for durability and performance. The 250-25118 part number undergoes rigorous testing to ensure reliable operation in emission control systems. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term use in compatible Audi, Porsche, and Volkswagen vehicles.