Walker 350-34508 Oxygen Sensor

Walker Oxygen Sensor for Mercedes-Benz Applications

Walker Products 350-34508 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for select Mercedes-Benz vehicles. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Key Features

• Heated oxygen sensor with 4-wire design
• Specific-fit application for direct vehicle matching
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for proper harness connection
• Wiring harness length: 10.35 in.; overall length: 13.9 in.
• Walker Products Aftermarket part number 350-34508

Detailed Description

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for OE replacement use across many vehicle platforms. Part number 350-34508 is application-specific for Mercedes-Benz models including ML55 AMG, SL600, CL500, E320, E430, ML320, ML430, S430, S500, CL600, S420, S600, SLK230, SL500, C280, C36 AMG, E420, and SL320 across the listed upstream and downstream positions. This sensor is intended to restore the ECU feedback needed for accurate air-fuel control and emissions monitoring.

When an oxygen sensor begins to fail, the vehicle may run poorly, use more fuel, increase exhaust emissions, or trigger the malfunction indicator light. Because sensor performance depends on the sensor body, wiring harness, and connector condition, those components should be inspected for damage during diagnosis. This part cross-references Bosch 15717 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running or inconsistent fuel mixture control
• Increased fuel consumption from incorrect exhaust feedback
• Elevated exhaust emissions from a degraded sensor signal
• Fault codes stored in the ECU for affected sensor circuits

Installation Notes and Tips

Confirm the exact position before ordering: upstream right, upstream left, downstream right, downstream left, upstream, or downstream, depending on the vehicle listing. This Walker 350-34508 uses a threaded mount and a male connector, so match the connector shape and wire count to the original sensor before installation. For Mercedes-Benz ML55 AMG and SL600 applications, verify the correct bank and sensor location; for CL500, check the VIN break noted in the fitment data.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement components and operates as an Automotive ISO9001/TS 16949 certified company. Since 1946, the brand has supplied fuel system and sensor components for vehicle service and repair.