Genuine OEM Volkswagen Engine Control Unit, part number 05E906013M17A. This unit is the central computer responsible for managing various engine operations, including fuel injection, ignition timing, and emissions control. It is typically located within the engine bay or passenger compartment. This unit weighs 1.008 kg and measures 0.19m x 0.185m x 0.04m. Genuine OEM ECUs are critical as they come with the correct firmware and sensor calibration, ensuring precise engine management and optimal performance.