Walker 350-34311 Oxygen Sensor - Upstream

Walker 350-34311 Oxygen Sensor for 1995 Volkswagen Passat

Walker Products 350-34311 is a specific-fit heated oxygen sensor engineered for OE-style replacement on the 1995 Volkswagen Passat, upstream position. It is built to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring.

Key Features

• Specific-fit heated oxygen sensor for the upstream location
• 4-wire design with a male connector and radiused polygon connector shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 23.74 in.; overall length: 27.28 in.
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensor applications

Product Details

Walker Products Aftermarket focuses on engine management sensors developed as OE replacement parts for a wide range of vehicles. Part number 350-34311 is designed for the upstream oxygen sensor location on the 1995 Volkswagen Passat, including chassis-specific applications noted for B1S1 and chassis # 3A-S-202 676. As an oxygen sensor for the Volkswagen Passat upstream position, it supports the ECU’s ability to monitor exhaust content and adjust air-fuel strategy.

This part cross-references Bosch (e.g., 13275) for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough running or hesitation from inaccurate exhaust sensing
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes

Verify the upstream location and chassis notes before ordering for the 1995 Volkswagen Passat. Inspect the sensor wiring harness and connector for damage before installation, since physical wear can shorten service life. Confirm thread size, connector style, and harness length match the original sensor before replacement.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The 350-34311 is built as a specific application replacement to deliver the diagnostic feedback expected by the vehicle ECU.