Walker 250-25026 Oxygen Sensor

OE Oxygen Sensor for Ford Transit and Audi/VW

Walker Products OE 250-25026 is a heated oxygen sensor built as an OE-style replacement for specific upstream positions. It is engineered for direct fitment and the diagnostic feedback the ECU expects, helping maintain proper air-fuel control on vehicles such as the Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD.

Walker Products OE focuses on application-specific sensors, with fitment matched to the vehicle position and connector style. For buyers searching for an upstream right oxygen sensor for Ford Transit or an upstream oxygen sensor for Audi and Volkswagen applications, this part number is built to match the required sensor location and signal output.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for the listed vehicle applications
• 5-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for OE-style connection
• Wiring harness length: 29.06 in.; overall length: 32.6 in.

Detailed Description

Walker Products OE 250-25026 is designed for vehicles that rely on accurate upstream oxygen sensor input to manage fuel delivery and emissions. This sensor is listed for upstream right, upstream, upstream left, and upstream front positions depending on the application, including 2020-2025 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD, plus select Audi and Volkswagen models such as the Audi A3 Quattro, Audi S6, Audi TT RS Quattro, Volkswagen Eos, Volkswagen R32, and Volkswagen Phaeton. If you are replacing a Ford Transit upstream right oxygen sensor or servicing an Audi/VW upstream sensor location, part number 250-25026 is built for the specified fitment and ECU feedback requirements.

What It Helps Address

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

Installation Notes and Tips

Confirm the exact position before installation, since this sensor is listed for multiple upstream locations across different applications. Inspect the sensor wiring harness and connector for physical damage before replacement, and verify the threaded mounting point and connector shape match the original part. For Ford Transit oxygen sensor replacement, confirm the upstream right B1S1 position where specified. For Audi and Volkswagen applications, match the listed bank, cylinder, and side notes exactly to the vehicle.

Quality Assurance

Walker Products OE sensors are developed as original-equipment replacement parts for specific applications and positions. Walker Products has produced engine management and fuel system components since 1946 and operates with ISO 9001/TS 16949 certification standards.