Walker 350-35007 Oxygen Sensor - Upstream or Upstream Left

Walker Oxygen Sensor for OE Replacement

Walker Products 350-35007 is a heated oxygen sensor built as a specific-fit OE replacement for select Volkswagen and Audi applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a direct choice for upstream sensor service on covered vehicles.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for application-specific fitment. This part number is matched to the mounting position and connector style required for the listed vehicles, including Volkswagen Beetle, Volkswagen Beetle Cabrio, Volkswagen Touareg, and Audi A8 Quattro applications.

Key Features

• Part number 350-35007 heated oxygen sensor
• Specific fit for the listed upstream applications
• Threaded mounting type with 18.0 mm thread diameter
• 5-wire design with 20-gauge wiring
• Male connector with radiused polygon connector shape
• Wiring harness length: 65.47
• Overall length: 69.02
• Built for ECU feedback on emissions and fuel-trim control

Detailed Description

Walker Products 350-35007 is an upstream oxygen sensor designed for direct replacement on select 2008-2016 Volkswagen and Audi vehicles. It is a heated sensor with a threaded mount, specific vehicle fitment, and connector/wiring details that match the original application requirements. For drivers searching for an upstream oxygen sensor for Volkswagen Beetle, Volkswagen Touareg, or Audi A8 Quattro, this part provides the correct fitment profile for the listed positions.

As part of Walker Products Aftermarket engine management coverage, this sensor is intended to restore accurate exhaust-gas feedback to the ECU. That feedback is critical for air-fuel management, emissions monitoring, and fault-code diagnosis on modern vehicles. The part number 350-35007 is also a useful reference when cross-checking catalog listings for the same application.

This part cross-references no additional part numbers provided in the supplied data.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a failing sensor signal
• Fault codes stored in the ECU for sensor or related system issues

Installation Notes and Tips

• Confirm the vehicle position before ordering: upstream left or upstream, depending on application.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Check the exhaust bung threads and mounting surface for damage prior to threading in the sensor.
• Use the listed connector shape, wire count, and thread diameter to verify match-up with the original part.
• After installation, clear stored fault codes and verify sensor operation with a scan tool.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts for worldwide vehicle applications. The company is ISO 9001/TS 16949 certified and has supplied engine management and fuel system components since 1946.

• Compatible with 2016 Volkswagen Touareg, upstream left
• Compatible with 2011 Volkswagen Beetle, upstream
• Compatible with 2009-2010 Volkswagen Beetle, upstream
• Compatible with 2010 Volkswagen Beetle Cabrio, upstream
• Compatible with 2008-2009 Audi A8 Quattro, upstream