Walker 350-34205 Oxygen Sensor

Walker 350-34205 Oxygen Sensor for OE-Style Engine Management

Walker Products 350-34205 is a heated oxygen sensor built as a specific-fit replacement for select Volkswagen, Audi, and related applications. It is designed to deliver the ECU feedback needed for accurate fuel control, emissions monitoring, and fault-code diagnosis.

For vehicles such as the Volkswagen Pointer, Pointer Truck, Passat, EuroVan, and Audi A4/A4 Quattro, this sensor supports proper upstream or downstream operation based on the listed position. The Walker Products Aftermarket line focuses on application-specific engine management components for direct replacement service.

Key Features

• Part number: 350-34205
• Heated oxygen sensor for faster operating response
• Specific fitment for listed vehicle applications
• 4-wire design with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 54.25
• Overall length: 57.8
• Connector shape: radiused polygon

Detailed Description

Walker Products 350-34205 is engineered as an OE-style oxygen sensor replacement for vehicles that rely on precise exhaust feedback to manage air-fuel ratio and emissions performance. It is listed for upstream and downstream positions across select Audi A4, Audi A4 Quattro, Audi Cabriolet, Volkswagen EuroVan, Volkswagen Passat, Volkswagen Pointer, and Volkswagen Pointer Truck applications. If your vehicle has a stored oxygen sensor fault, poor fuel economy, rough running, or an illuminated malfunction indicator light, this sensor is a direct replacement option for the affected position.

Walker Products Aftermarket supports engine management service with application-specific sensors built for the correct fitment position and ECU feedback requirements. Part number 350-34205 is a practical choice when replacing a heated oxygen sensor on 1994-2010 Volkswagen and Audi platforms listed in the fitment data.

What It Helps Address

• Oxygen sensor fault codes stored in the ECU
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from a failing sensor
• Elevated exhaust emissions
• Malfunction indicator light illumination

Installation Notes and Tips

Confirm the required position before ordering: upstream, downstream, downstream right, or downstream left, depending on the vehicle listing. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect readings. Verify thread diameter, connector style, and harness length against the original part to ensure proper routing and fit.

Fits 2004-2010 Volkswagen Pointer Truck, upstream; fits 2001-2009 Volkswagen Pointer, upstream; fits 1998-2000 Audi A4 Quattro, upstream; fits 1999-2000 Volkswagen EuroVan, downstream; fits 1998-1999 Audi A4, upstream; fits 1998-1999 Volkswagen Passat, upstream; fits 1994-1998 Audi Cabriolet, downstream right and downstream left.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The 350-34205 oxygen sensor is manufactured for the specified application and position to support the diagnostic feedback expected by the vehicle ECU.