Walker 350-34058 Oxygen Sensor

Walker 350-34058 Oxygen Sensor Overview

Walker Products 350-34058 is a heated, threaded oxygen sensor built for specific downstream applications on select Audi and Volkswagen vehicles. It is engineered as an OE-style replacement that delivers the ECU feedback needed for proper fuel control and emissions monitoring.

Compatible With 1996-2000 Audi A4, A4 Quattro, A6, A6 Quattro and 1998-2000 Volkswagen Passat downstream positions, this sensor is a direct-fit option for common rear and front downstream service needs.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• Specific-fit design for the listed vehicle applications and sensor positions
• 4-wire configuration with male connector and radiused polygon connector shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 65.47; overall length: 69.02
• Walker Products Aftermarket part number 350-34058

Detailed Product Description

Walker Products Aftermarket 350-34058 is designed for downstream oxygen sensor replacement on select Audi and Volkswagen models, including 1996-1999 Audi A4, A4 Quattro, A6, and A6 Quattro, plus 1998-2000 Volkswagen Passat applications. The heated sensor design supports accurate exhaust feedback to the ECU, helping maintain proper air-fuel management and emissions system operation. Walker Products has focused on engine management and oxygen/air-fuel sensors since 1946, and this part reflects that OE-replacement approach for specific fitment and position requirements.

This part cross-references Bosch 15717 for the same application.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Elevated exhaust emissions from a failing sensor signal
• Rough engine operation tied to faulty ECU sensor input
• Damaged sensor wiring or connector issues during diagnosis

Installation Notes and Fitment Tips

• Fits 1998-2000 Volkswagen Passat, downstream rear.
• Fits 1998-2000 Volkswagen Passat, downstream front.
• Fits 1996-1999 Audi A4, downstream right.
• Fits 1996-1999 Audi A4, downstream left.
• Fits 1996-1999 Audi A4 Quattro, downstream right.
• Fits 1996-1999 Audi A4 Quattro, downstream left.
• Fits 1998-1999 Audi A6, downstream right.
• Fits 1998-1999 Audi A6, downstream left.
• Fits 1998-1999 Audi A6 Quattro, downstream right.
• Fits 1998-1999 Audi A6 Quattro, downstream left.

Confirm the sensor position before installation, since downstream front, rear, left, and right locations are application-specific. Inspect the sensor, wiring harness, and connector for physical damage before replacement, and verify the connector shape and threaded mounting style match the original unit.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement components for specific vehicle applications and positions. The brand operates as an Automotive ISO9001/TS 16949 certified company, with product development focused on fitment accuracy and ECU feedback requirements.