Walker 350-35006 Oxygen Sensor - Downstream or Upstream

Walker 350-35006 Oxygen Sensor for Mercedes-Benz

Walker Products 350-35006 is a heated oxygen sensor built as a specific-fit OE replacement for select Mercedes-Benz diesel applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring on upstream and downstream positions where listed.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Mercedes-Benz Sprinter, GL350, GLS350d, ML350, and R350 applications
• Threaded mounting type with 18.0 mm thread diameter
• 5-wire design with a 20-gauge harness
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 10.55 in.; overall length: 14.09 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for OE-style replacement use. Part number 350-35006 is built for the specified fitment position and is intended to deliver the diagnostic feedback the ECU expects on Mercedes-Benz diesel models. This part cross-references Bosch (e.g., 0258017025) for the same application.

Compatible vehicle coverage includes 2022-2023 Mercedes-Benz Sprinter 1500 upstream, 2020-2023 Mercedes-Benz Sprinter 2500 upstream, 2014-2017 Mercedes-Benz Sprinter 2500 upstream, 2020-2022 Mercedes-Benz Sprinter 3500 upstream, 2014-2017 Mercedes-Benz Sprinter 3500 upstream, 2020-2022 Mercedes-Benz Sprinter 3500XD upstream, 2017 Mercedes-Benz GLS350d upstream, 2016 Mercedes-Benz GL350 upstream, 2013-2015 Mercedes-Benz GL350 upstream, 2011-2014 Mercedes-Benz ML350 downstream, 2011-2012 Mercedes-Benz R350 downstream, 2010-2011 Mercedes-Benz GL350 downstream, 2011 Mercedes-Benz ML350 upstream, and 2010 Mercedes-Benz R350 downstream.

What It Helps Address

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

Installation Notes

Verify the sensor position before installation, since this part is listed for both upstream and downstream applications depending on the vehicle. Inspect the sensor, wiring harness, and connector for physical damage before replacement, and confirm the threaded mounting and connector style match the original unit on the vehicle.

Quality Assurance

Walker Products has supplied engine management components since 1946 and manufactures this oxygen sensor as a specific application replacement for the listed Mercedes-Benz models. The brand operates under Automotive ISO9001/TS 16949 certification and builds parts to support the diagnostic requirements of modern ECU-controlled systems.