Walker 350-34601 Oxygen Sensor

Walker 350-34601 Oxygen Sensor Overview

Walker 350-34601 is a heated oxygen sensor built as a specific-fit replacement for select Volkswagen and Audi applications. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring, including downstream and bank-specific positions.

Walker Products Aftermarket focuses on OE-style engine management and oxygen/air-fuel sensors, with application-specific fitment and connector design for the vehicle position listed. For drivers diagnosing a check engine light, poor fuel economy, or elevated emissions, the sensor, wiring harness, and connector should all be inspected for damage before replacement.

Key Features

• Heated oxygen sensor for emissions and fuel-trim feedback
• Specific-fit design for the listed vehicle position
• 4-wire configuration with 22-gauge wiring
• 34.96 in. wiring harness length and 38.5 in. overall length
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon connector shape with male connector gender
• Fits downstream and upstream positions across select Volkswagen Jetta, Golf, Passat, Phaeton, and Audi TT Quattro applications

Detailed Description

This Walker Products oxygen sensor, part number 350-34601, is designed for direct replacement use in specific emissions-control locations. It supports ECU feedback on vehicles such as the Volkswagen Jetta, Volkswagen Passat, Volkswagen Phaeton, Volkswagen Golf, and Audi TT Quattro, with fitment listed for downstream, downstream left, downstream right, downstream front, downstream rear, and upstream positions where specified. The sensor’s heated design helps it reach operating temperature quickly so the engine management system can monitor exhaust oxygen content and adjust fueling accordingly.

Walker Products Aftermarket builds this sensor as an OE replacement for the listed applications, with the correct connector style, wire count, and threaded mounting configuration for the intended position. Part number 350-34601 is also referenced for select 2010 Volkswagen Jetta downstream applications and 2004-2006 Audi TT Quattro downstream left applications.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine running caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Higher exhaust emissions from a failing sensor
• Fault codes stored in the ECU for affected sensor circuits

Installation Notes and Tips

• Confirm the exact position before installation: downstream, upstream, left, right, front, or rear as listed.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement.
• Verify thread diameter and connector shape match the original sensor on the vehicle.
• Use the vehicle’s fault codes and service information to confirm the affected bank and sensor location.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. This part number, 350-34601, is manufactured for the specified application and position to support the diagnostic feedback expected by the ECU.