Walker 350-33064 Oxygen Sensor - Upstream Left or Upstream Right

Walker 350-33064 Oxygen Sensor for Audi A4

Walker Products 350-33064 is a heated oxygen sensor built as a specific-fit OE replacement for select 1996-1997 Audi A4 and Audi A4 Quattro applications. It is engineered to deliver the ECU feedback needed for upstream sensor monitoring on the right or left side.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• Threaded mounting type with 18.0 mm thread diameter
• 3-wire configuration with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 14.29
• Overall length: 17.83

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements for worldwide vehicle coverage. Part number 350-33064 is built for the specified fitment position and is intended to provide the diagnostic feedback the ECU expects from the upstream oxygen sensor circuit. For Audi A4 and Audi A4 Quattro models, this sensor supports the right or left upstream location as listed in the fitment data.

This part cross-references no listed interchange numbers for the same application.

What It Helps Address

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

Installation Notes

Fits 1996-1997 Audi A4, upstream right. Fits 1996-1997 Audi A4, upstream left. Fits 1996-1997 Audi A4 Quattro, upstream right. Fits 1996-1997 Audi A4 Quattro, upstream left.

Before installation, inspect the sensor, wiring harness, and connector for physical damage. Confirm the threaded mounting location, connector shape, and upstream position match the vehicle before replacement. This sensor is specific fit, so application verification is important for proper ECU feedback.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-33064 is manufactured for the listed application and fitment position to support correct diagnostic system response.