Walker 350-34073 Oxygen Sensor - Downstream Left or Downstream Right

Walker Oxygen Sensor for Audi A8 Quattro

Walker Products 350-34073 is a specific-fit heated oxygen sensor engineered for select 2001-2003 Audi A8 Quattro applications. It is built to deliver the ECU feedback needed for downstream fuel control and emissions monitoring on the correct side of the vehicle.

Key Features

• Specific-fit oxygen sensor for select Audi A8 Quattro models
• Heated sensor design for faster operating temperature
• 4-wire configuration with 22-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 61.34 in.; overall length: 64.88 in.

Product Details

Walker Products Aftermarket 350-34073 is part of the Walker Products Engine Management line, which focuses on OE-style replacement sensors for vehicle-specific fitment and ECU feedback requirements. This oxygen sensor is designed for downstream placement on the 2001-2003 Audi A8 Quattro, including downstream left and downstream right positions. The heated design helps the sensor reach operating temperature quickly so the engine management system can monitor exhaust content and adjust fuel delivery as needed. This part cross-references no listed aftermarket numbers in the provided data.

Common Symptoms It May Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Higher exhaust emissions from a failing downstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Compatible With 2001-2003 Audi A8 Quattro, downstream right. Compatible With 2001-2003 Audi A8 Quattro, downstream left. Verify connector shape, thread diameter, and harness routing before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect signal quality.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 350-34073 is produced as a vehicle-specific replacement sensor for the listed Audi A8 Quattro applications.