Walker 350-35064 Oxygen Sensor - Downstream, Upstream, Upstream Front or Upstream Left

Walker 350-35064 Oxygen Sensor for OE Replacement

Walker Products 350-35064 is a heated oxygen sensor built as a specific-fit OE replacement for select Volkswagen and Audi applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Key Features

• Heated oxygen sensor with specific vehicle fitment
• Threaded mounting type with 18.0 mm thread diameter
• 5-wire design with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 49.72 in.; overall length: 53.27 in.
• Walker Products Aftermarket engine management sensor line

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors engineered for OE-style replacement. Part number 350-35064 is built for the specified application and position, including upstream and downstream locations across select Volkswagen Amarok, Jetta, Passat, Golf, Beetle, Touareg, Eos, Golf SportWagen, Bora, and Audi A3, A4, A4 Quattro, Q7, S8, and TT Quattro models. This sensor is designed to provide the ECU with the correct feedback needed for closed-loop operation and emissions monitoring.

Compatible fitment includes 2022-2023 Volkswagen Amarok, upstream; 2015-2018 Volkswagen Passat, upstream left; 2009-2017 Volkswagen Jetta, upstream; and 2005-2009 Audi A4, upstream. The part number 350-35064 also appears in additional Volkswagen and Audi applications across the 2005-2023 model years.

What It Helps Address

• Check engine or MIL illumination related to oxygen sensor faults
• Poor engine performance caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel readings
• Higher exhaust emissions from a failing heated oxygen sensor
• Fault codes stored in the ECU for sensor or related system issues

Installation Notes and Tips

Confirm the sensor position before ordering, since fitment varies by upstream, downstream, left, right, and front applications. Inspect the sensor connector, wiring harness, and surrounding exhaust components for damage before installation. For best results, verify the vehicle’s engine code and sensor location against the listed fitment for your Volkswagen or Audi application. Part number 350-35064 is a threaded, specific-fit sensor and should be matched to the exact OE-style position.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The Walker Products Aftermarket sensor line is developed as an OE replacement solution for precise application fitment and ECU feedback requirements.