Walker 250-25115 Oxygen Sensor - Upstream

Overview of Walker 250-25115 Oxygen Sensor

The Walker 250-25115 oxygen sensor is designed specifically for select Audi and Volkswagen models, including the A3, Golf, Golf Alltrack, Golf SportWagen, and GTI. This heated oxygen sensor provides accurate emissions control by monitoring exhaust gases and ensuring optimal engine performance.

• Heated sensor type for faster response times
• Specific fit for Audi and Volkswagen vehicles
• 22.63-inch wiring harness length for precise 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 27.55 inches for proper fitment

Detailed Product Description

This oxygen sensor from Walker Products OE is engineered to meet the exact specifications of your vehicle’s emission system. The heated sensor design allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 5-wire configuration and 20 gauge wiring ensure consistent and accurate data transmission to the engine control unit. The radiused polygon male connector and threaded mounting type with an 18.0 mm diameter provide a secure and stable installation, minimizing the risk of leaks or sensor failure. With a wiring harness length of 22.63 inches and an overall length of 27.55 inches, this sensor fits precisely in the exhaust system of compatible Audi and Volkswagen models.

Walker Products OE Brand Line

Walker Products OE focuses on delivering emission control components that meet or exceed original equipment standards. This oxygen sensor is part of the Walker Products OE line, which emphasizes precise fitment and reliable performance for specific vehicle applications. Using parts from this line helps maintain factory-level emissions control and engine efficiency.

Common Applications and Issues Addressed

• Restores proper air-fuel mixture readings for Audi A3 and Volkswagen Golf models
• Helps resolve rough idling and engine hesitation
• Reduces increased fuel consumption caused by faulty sensors
• Prevents check engine light triggers related to oxygen sensor faults
• Supports emission system compliance for Golf Alltrack, Golf SportWagen, and GTI

Installation Notes and Tips

• Ensure the vehicle is cool before sensor replacement to avoid burns
• Use appropriate tools for threaded mounting to prevent damage
• Verify connector type matches the vehicle harness (radiused polygon male)
• Check wiring harness length and routing to avoid tension or interference
• Follow manufacturer torque specifications for sensor installation

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. This part number 250-25115 undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.