Walker 350-33043 Oxygen Sensor - Upstream

Walker Oxygen Sensor for Mercedes-Benz SL

Walker Products 350-33043 is a heated oxygen sensor built as a specific-fit OE replacement for select Mercedes-Benz SL applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring on upstream sensor locations.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Mercedes-Benz applications
• 3-wire configuration with a female connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 15.28 in.; overall length: 18.82 in.
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as OE-style replacements for many vehicles worldwide. Part number 350-33043 is designed for upstream placement and is built to match the required fitment position and diagnostic feedback expected by the vehicle ECU. For Mercedes-Benz 300SL and Mercedes-Benz 500SL models, this sensor supports proper air-fuel monitoring and emissions system operation.

This part cross-references no listed interchange numbers in the provided data. Walker Products 350-33043 is a direct-fit oxygen sensor for drivers searching for a Mercedes-Benz 300SL upstream oxygen sensor or a Mercedes-Benz 500SL upstream oxygen sensor.

What It Helps Address

• Check engine or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Higher exhaust emissions from a failing upstream sensor
• Physical wear or damage to the sensor, wiring harness, or connector

Installation Notes

Install in the upstream position only for the listed applications. Before replacement, inspect the sensor wiring harness and connector for damage, since physical wear can shorten service life and affect readings. Verify thread size, connector style, and harness length against the original part before installation.

Quality Assurance

Walker Products states that its engine management sensors are manufactured under Automotive ISO 9001 / TS 16949 quality systems and developed for application-specific OE replacement use. Since 1946, the brand has supplied engine management and fuel system components for vehicle service needs.