Walker 350-34497 Oxygen Sensor - Downstream Left

Walker Products Oxygen Sensor for Audi Fitment

Walker Products part number 350-34497 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Audi applications. It is engineered for downstream left placement and provides the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the correct application and mounting position
• Downstream left location for bank 2 sensor 2 applications where listed
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 41.85 in.; overall length: 45.39 in.

Detailed Description

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for OE replacement use. The 350-34497 oxygen sensor is built for specific vehicle fitment and the listed downstream left position, helping maintain accurate diagnostic feedback to the ECU. For Audi Q7 and Audi A6 Quattro applications, as well as Audi A6 models shown in the fitment data, this sensor supports emissions system monitoring and fuel mixture control when the original sensor is worn or failing.

This part number, 350-34497, is listed for 2015 Audi Q7 downstream left, 2011-2014 Audi Q7 downstream left, 2010-2011 Audi A6 downstream left, 2009 Audi A6 Quattro downstream left, and 2005 Audi A6 Quattro downstream left. Walker Products 350-34497 is a direct-fit oxygen sensor for the specified downstream left location and connector style.

What It Helps Address

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

Installation Notes and Tips

Verify the vehicle’s exact year, model, and downstream left position before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect signal quality. Confirm the threaded mounting location and connector shape match the original part before replacement.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34497 is produced as a specific application replacement to deliver the diagnostic feedback expected by the ECU.