Walker 350-34143 Oxygen Sensor

Walker Oxygen Sensor for Audi A6 and 100

Walker Products 350-34143 is a heated oxygen sensor built as a specific-fit OE replacement for select Audi applications. It is engineered to provide the ECU with the exhaust feedback needed for fuel control and emissions monitoring on the listed upstream and downstream positions.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for direct replacement use. The 350-34143 follows the application-specific fitment approach used across the line, with the correct threaded mounting, connector style, and harness configuration for the vehicles listed below.

Key Features

• Heated oxygen sensor for faster operating temperature and signal response
• Specific fit for listed Audi A6 and Audi 100 applications
• 4-wire design with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector
• Wiring harness length: 45.98 in.
• Overall length: 49.53 in.
• Fits upstream and downstream positions shown in the fitment data

Detailed Description

Walker Products 350-34143 is an oxygen sensor for Audi A6 and Audi 100 models that require a heated, threaded sensor with the specified connector and harness layout. It is listed for 1994 Audi 100 and 100 Quattro upstream left and right positions from chassis # 4A-R-062 001, 1995 Audi A6 upstream left and right positions, and 1996-1997 Audi A6 downstream left and right positions. This part number, 350-34143, is built to deliver the diagnostic feedback the ECU expects from the affected sensor location.

As with any oxygen sensor replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. A failing sensor can contribute to poor engine performance, higher fuel use, increased exhaust emissions, and a malfunction indicator light. Walker Products 350-34143 is a direct-fit service part for the listed Audi A6 and Audi 100 applications.

What It May Help Resolve

• Check engine or malfunction indicator light related to oxygen sensor performance
• Rich or lean fuel mixture concerns
• Reduced fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions
• Poor drivability tied to sensor signal loss or slow response

Installation Notes and Tips

• Confirm the exact year, model, and sensor position before ordering.
• Match the upstream or downstream location shown for your vehicle.
• Check the connector, harness, and surrounding wiring for physical damage before replacement.
• Use the threaded mounting and connector orientation specified for the application.
• For 1994 Audi 100 and 100 Quattro applications, verify chassis # 4A-R-062 001 requirements.

Quality Assurance

Walker Products manufactures engine management sensors as OE-style replacement parts for global vehicle applications. The brand operates with Automotive ISO9001/TS 16949 certification and has supplied fuel system and sensor components since 1946. Part number 350-34143 is produced for the listed application-specific fitment and ECU feedback requirements.