Walker 350-35117 Oxygen Sensor - Center, Downstream or Upstream

Walker OE Replacement Oxygen Sensor

Walker OE Replacement part number 350-35117 is a specific-fit wide-band oxygen sensor built for direct application coverage on select BMW, Audi, Volkswagen, Kia, and Hyundai vehicles. It is a heated sensor with a 5-wire layout, oblong connector shape, and threaded M18 x 1.5 mounting for accurate exhaust feedback to the ECU.

Key Features

• Wide-band oxygen sensor for precise air-fuel monitoring
• Heated design for faster operating temperature and stable signal output
• Specific-fit application for direct vehicle coverage
• 5-wire configuration with male spade terminals
• Threaded M18 x 1.5 mounting with 22 mm wrench size
• Standard replacement grade for OE-style service work
• Overall length: 608 mm

Product Details

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. Part number 350-35117 is engineered for the specified sensor location and vehicle application so the ECU receives the feedback it expects from the exhaust system. This sensor is used on upstream, center, and downstream positions depending on the vehicle listing, including applications such as BMW X5 upstream B1S1, Volkswagen CC upstream B1S1, Audi Q7 downstream, and Kia Forte upstream or center positions. Walker OE Replacement 350-35117 is a practical choice when servicing emissions-related sensor faults on vehicles such as the BMW X5, Audi A3, and Volkswagen GTI.

This part cross-references no listed aftermarket interchange numbers in the provided data.

What It Helps Address

• Check engine light triggered by oxygen sensor faults
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation related to sensor signal loss
• Higher exhaust emissions from inaccurate mixture control
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Confirm the exact position before ordering, since this part is listed for upstream, center, and downstream applications across different vehicles. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Verify thread size, connector style, and wire count against the original sensor to ensure proper fitment on the BMW X5, Audi Q7, Volkswagen Passat CC, or other listed applications.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are manufactured for specific vehicle applications and fitment positions. The company is ISO 9001/TS 16949 certified and has supplied engine management components since 1946.