Genuine OEM Volkswagen Engine Control Unit, part number 05E906013D17A. This is the main computer that manages engine functions, processing data from various sensors to control fuel injection, ignition timing, and other critical operations. It is located within the engine bay assembly. This unit has dimensions of 0.19m x 0.185m x 0.04m and weighs 1.008 kg. Genuine OEM parts are essential for engine control units as they ensure the correct firmware and sensor calibration for reliable operation and adherence to emissions standards.