Walker 350-34418 Oxygen Sensor - Downstream Left

Walker 350-34418 Oxygen Sensor for Mercedes-Benz

Walker Products 350-34418 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Mercedes-Benz applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance on the affected downstream left position.

Key Features

• Heated oxygen sensor with 4-wire design
• Specific fit for the correct vehicle application and mounting position
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for direct replacement use
• Wiring harness length: 15.28 in.; overall length: 18.82 in.
• Walker Products Aftermarket line for engine management and oxygen sensor replacement

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensor replacement parts engineered for application-specific fitment. Part number 350-34418 is designed for the downstream left oxygen sensor location on select Mercedes-Benz models, including 1998-2000 Mercedes-Benz C280, 1998-2000 Mercedes-Benz C43 AMG, 1998-2000 Mercedes-Benz CLK320, and 1999-2000 Mercedes-Benz CLK430. As a heated sensor, it is built to provide the ECU with the feedback needed for closed-loop operation and emissions monitoring.

This part cross-references no listed alternate part numbers in the provided data. Walker Products 350-34418 is a direct-fit oxygen sensor choice for Mercedes-Benz downstream left oxygen sensor replacement needs.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough engine operation from inaccurate air-fuel readings
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Confirm the downstream left position before ordering and compare the connector shape, wire count, thread diameter, and harness length to the original sensor. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since physical damage can shorten sensor life. Verify the exhaust bung threads are clean and undamaged prior to threading in the replacement sensor.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement parts for specific applications and fitment positions. The company states its operations are ISO 9001/TS 16949 certified and has supplied engine management components since 1946.