Walker 350-33061 Oxygen Sensor - Upstream

Walker 350-33061 Oxygen Sensor for Mercedes-Benz

Walker Products 350-33061 is a heated oxygen sensor built as a specific-fit replacement for select Mercedes-Benz applications. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Compatible with 1990-1993 Mercedes-Benz 300TE upstream oxygen sensor applications, this Walker Products Aftermarket sensor uses a threaded mounting design, a female radiused-polygon connector, and a 3-wire heated configuration.

Key Features

• Specific-fit oxygen sensor for select Mercedes-Benz 300TE applications
• Heated sensor design for faster operating response
• 3-wire construction with 20-gauge wiring
• 11.73 in. wiring harness length and 15.28 in. overall length
• 18.0 mm threaded mounting type
• Female radiused-polygon connector shape
• Walker Products Aftermarket part number 350-33061

Product Details

Walker Products engine management and oxygen/air-fuel sensors are developed as OE-style replacement parts for worldwide vehicle applications. Part number 350-33061 is built for the upstream position on select Mercedes-Benz 300TE models, where accurate exhaust-gas feedback is required for the ECU to manage air-fuel ratio and emissions performance. The Walker Products Aftermarket line focuses on application-specific fitment, so the sensor configuration matches the vehicle’s mounting and connector requirements.

This part cross-references Bosch 13913 and Denso 234-4018 for the same application.

What It Helps Address

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

Installation Notes and Tips

• Install in the upstream oxygen sensor location specified for the vehicle.
• Verify connector shape, wire count, and harness length before installation.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion.
• Check for exhaust leaks or related engine management faults that can affect sensor readings.
• Confirm thread size and mounting style match the original application.

Quality Assurance

Walker Products is an automotive ISO 9001/TS 16949 certified company with a long history in engine management and fuel system components. The 350-33061 oxygen sensor is manufactured for specific vehicle application fitment and ECU feedback requirements.