Walker 350-34492 Oxygen Sensor - Downstream

Walker 350-34492 Oxygen Sensor for Audi A8 Quattro

Walker Products 350-34492 is a heated downstream oxygen sensor built for specific vehicle applications and OE-style diagnostic feedback. It is engineered for the Audi A8 Quattro downstream position, with fitment coverage for cylinder-bank applications noted in the vehicle listing.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for the listed Audi A8 Quattro applications
• 4-wire configuration with a 22-gauge harness
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon connector shape with male connector end
• Overall length: 68.03; wiring harness length: 64.49

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as OE replacement parts for worldwide vehicle coverage. Part number 350-34492 is built for the downstream location on the Audi A8 Quattro and is listed for 2005-2006, 2007, and 2008-2009 model years. Fitment notes specify cylinder-bank coverage for cylinders 4-6, including VIN-specific applications for 2007 Audi A8 Quattro models. This part cross-references no listed interchange numbers in the provided data.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor or wiring issues
• Stored ECU fault codes associated with the affected sensor circuit

Installation Notes

Before replacement, inspect the sensor, wiring harness, and connector for heat damage, abrasion, or corrosion. Confirm the downstream location, cylinder-bank application, and VIN breakpoints for 2007 Audi A8 Quattro models before installation. Threaded mounting and the specific connector design should be matched to the original part for proper fitment.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The 350-34492 oxygen sensor is produced as a specific-application replacement to support the diagnostic feedback expected by the ECU.