Oxygen Sensor 0035427018 MERCEDES-BENZ

This Oxygen Sensor is a core sensing component of the engine management system for Mercedes-Benz vehicles, installed upstream of the catalytic converter in the exhaust system (pre-catalyst). Its primary function is to monitor oxygen content in exhaust gases in real time and transmit air-fuel ratio signals to the Engine Control Unit (ECU), enabling precise fuel injection adjustment to maintain optimal air-fuel ratio for efficient combustion, reduced fuel consumption, and minimized harmful emissions.

The sensor features an M18×1.5 standard thread, a 5-pin or 6-pin D-shape electrical connector, and a cable length of 420mm to 560mm depending on version. Constructed with robust ceramic architecture and optimized heater control, it offers excellent high-temperature resistance and vibration resistance for long-term stable operation under the demanding high-temperature conditions of engine exhaust systems. Its mounting dimensions and interfaces strictly follow Mercedes-Benz original specifications for direct replacement without modification.