Industrial UpDown Oxygen Sensor for BMW 550i, 650i, 750i, 750Li, X6, and Alpina B6, B7, B7L.
It measures exhaust oxygen content to inform the engine control unit and help optimize the air-fuel ratio for better driveability and emissions performance.
This sensor is intended for use with the listed vehicles' exhaust sensing system, providing the data needed for accurate feedback to the ECU.
