Walker 350-34380 Oxygen Sensor

Walker 350-34380 Oxygen Sensor for Mercedes-Benz

Walker Products 350-34380 is a heated, threaded oxygen sensor built as a specific-fit replacement for select Mercedes-Benz applications. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring on downstream and upstream positions.

Walker Products Aftermarket focuses on OE-style engine management and oxygen/air-fuel sensors for precise application fitment. For Mercedes-Benz C230, E320, E430, SL500, and related models, this sensor is matched to the listed position and connector style for direct replacement service.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for listed Mercedes-Benz applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon connector shape with male connector
• Wiring harness length: 22.36
• Overall length: 25.91
• Part number: 350-34380

Detailed Description

Walker 350-34380 is an emission control sensor intended for vehicles that rely on oxygen sensor input to manage air-fuel ratio and monitor catalyst performance. It is a specific-fit replacement, so the sensor position, connector, and harness layout are matched to the application rather than universal use. This helps support proper ECU diagnostics on Mercedes-Benz models including C230, E320, E430, CL500, SL500, S420, S500, C280, C36 AMG, E55 AMG, and E420 where listed.

Walker Products Aftermarket has supplied engine management components since 1946, and this oxygen sensor reflects that OE-replacement focus. If the original sensor has failed, the vehicle may store fault codes, run rich or lean, increase fuel consumption, or illuminate the malfunction indicator light. The part number 350-34380 is built for the specified downstream and upstream positions shown in the fitment data.

What It Helps Address

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

Installation Notes and Tips

Verify the exact year, model, and sensor position before installation. This part fits 2002 Mercedes-Benz SL500, downstream right; 2002 Mercedes-Benz SL500, downstream left; 2000 Mercedes-Benz C230, downstream; 2000 Mercedes-Benz E320, upstream right; 2000 Mercedes-Benz E430, upstream right; 1999 Mercedes-Benz CL500, downstream left; 1999 Mercedes-Benz E320, upstream left; 1999 Mercedes-Benz E430, upstream left; 1999 Mercedes-Benz E55 AMG, upstream right; 1999 Mercedes-Benz E55 AMG, upstream left; 1999 Mercedes-Benz S420, downstream left; 1999 Mercedes-Benz S500, downstream left; 1997 Mercedes-Benz C280, downstream; 1997 Mercedes-Benz C36 AMG, downstream; 1997 Mercedes-Benz E320, upstream; 1997 Mercedes-Benz E320, downstream; 1997 Mercedes-Benz E420, upstream right; 1997 Mercedes-Benz E420, upstream left; 1996 Mercedes-Benz C280, downstream; 1996 Mercedes-Benz C36 AMG, downstream.

Inspect the sensor wiring harness and connector for damage before replacement, since physical wear can shorten sensor life. For Mercedes-Benz oxygen sensor replacement, confirm the downstream or upstream location and match the connector style to the original unit.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company, and its engine management sensors are developed as OE-replacement parts for specific applications. Part number 350-34380 is built to provide the diagnostic feedback required by the ECU in the listed Mercedes-Benz fitments.