Walker 350-34365 Oxygen Sensor

Walker 350-34365 Oxygen Sensor Overview

Walker Products 350-34365 is a heated oxygen sensor built as a specific-fit OE replacement for select Volkswagen, Audi, and Porsche applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. The 350-34365 follows that approach with a threaded mounting design, 4-wire heated construction, and vehicle-specific connector and harness layout.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• 4-wire configuration with 22-gauge wiring
• 29.06 in. wiring harness length
• 18.0 mm thread diameter with threaded mounting type
• Radiused polygon connector shape with male connector gender
• Overall length: 32.6 in.

Detailed Description

The Walker Products 350-34365 oxygen sensor is designed for OE-style replacement in emissions control systems where accurate exhaust feedback is required by the ECU. It is used across select Volkswagen Jetta, Volkswagen Passat, Volkswagen Touareg, Audi A3, Audi A5, Audi A8 Quattro, Audi Q7, Porsche Cayenne, Volkswagen CC, Volkswagen GTI, Volkswagen Passat CC, and Volkswagen A3 Quattro applications, including upstream, downstream, center, center left, downstream left, downstream right, and downstream front positions. For fitment-specific searches, this part is commonly referenced for Volkswagen Jetta upstream oxygen sensor replacement and Audi A5 upstream oxygen sensor replacement.

Walker Products has supplied engine management components since 1946 and manufactures this sensor for the specified vehicle position so the ECU receives the correct signal for closed-loop operation. This part number, 350-34365, is also a fitment match for several 2006-2018 Volkswagen, Audi, and Porsche applications listed below.

What It Helps Address

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

Installation Notes and Tips

• Confirm the exact position before ordering, since this sensor is application-specific.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation.
• Verify thread size and connector style against the original sensor.
• Use the vehicle’s fault codes and service information to confirm upstream, downstream, center, or side-specific placement.
• For fitment-based searches, this part is listed for 2018 Volkswagen Jetta upstream, 2011-2014 Audi A5 upstream, and 2007-2010 Audi Q7 downstream left applications.

Quality Assurance

Walker Products Aftermarket manufactures engine management sensors as OE replacement components for specific vehicle applications. The brand is ISO 9001/TS 16949 certified, and this oxygen sensor is built to support the diagnostic feedback required by the ECU in the listed fitments.