Walker 350-34627 Oxygen Sensor - Downstream

Walker 350-34627 Oxygen Sensor for Golf and Jetta

Walker Products 350-34627 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for downstream monitoring on select Volkswagen applications. It is built for 2002-2005 Volkswagen Golf and 2002-2004 Volkswagen Jetta models with the downstream sensor position.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fit for the listed Volkswagen applications
• 4-wire design with a 22-gauge harness
• Threaded mounting with an 18.0 mm thread diameter
• Radiused polygon male connector for vehicle-side connection
• Wiring harness length: 33.98 in.; overall length: 37.52 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built to match the original application, fitment position, and ECU feedback requirements. Part number 350-34627 is a downstream oxygen sensor for Volkswagen Golf and Volkswagen Jetta models, where accurate exhaust feedback helps the engine control system monitor catalyst performance and related emissions data. The Walker Products 350-34627 sensor is designed for direct replacement use on the specified vehicles and positions.

This part cross-references no listed alternate part numbers for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing oxygen sensor
• Stored ECU fault codes tied to the sensor circuit or related systems

Installation Notes and Tips

Install this sensor in the downstream position only on the listed Volkswagen Golf and Jetta applications. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life. Confirm the threaded mounting location and connector shape match the original unit before installation.

Quality Assurance

Walker Products states that its engine management sensors are developed as OEM replacement parts and manufactured under Automotive ISO9001/TS 16949 quality systems. The brand has supplied engine management and fuel system components since 1946.