Walker 350-34083 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34083 Oxygen Sensor for Mercedes-Benz

Walker Products 350-34083 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select Mercedes-Benz applications. It is built for downstream use and provides the ECU with the feedback needed to monitor exhaust performance and emissions control.

For Mercedes-Benz C300, E350, GLK350, S550, and related models, this Walker Products Aftermarket sensor is matched to the application, mounting position, and connector style for direct replacement service.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fit for application-matched installation
• 4-wire design with female connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 17.24 in.
• Overall length: 20.79 in.
• Radiused polygon connector shape
• Walker Products part number 350-34083

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE replacement parts for a wide range of vehicles. Part number 350-34083 is manufactured for specific downstream positions and is intended to deliver the diagnostic feedback expected by the ECU. The heated sensor design supports accurate exhaust monitoring on Mercedes-Benz models where downstream left or downstream right placement is required.

This part cross-references Bosch 17098 and Denso 234-9005 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal issues
• Stored ECU fault codes for affected oxygen sensor circuits

Installation Notes

• Verify the required position before ordering: Fits 2006-2011 Mercedes-Benz R350, downstream left; Fits 2007-2011 Mercedes-Benz S550, downstream left or downstream right; Fits 2008-2012 Mercedes-Benz C300, downstream left or downstream right.
• Also fits 2010-2013 Mercedes-Benz S400, downstream left or downstream right; Fits 2010-2012 Mercedes-Benz GLK350, downstream right; Fits 2007-2011 Mercedes-Benz E63 AMG, downstream left or downstream right.
• Inspect the sensor, wiring harness, and connector for physical damage before installation.
• Confirm connector shape, thread size, and harness length match the original unit.
• Clear stored fault codes after repair and verify proper ECU feedback.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34083 oxygen sensor is built to support the fitment and diagnostic requirements of the listed Mercedes-Benz applications.