Genuine OEM Volkswagen Engine Control Unit, part number 4D0907560DM. This unit is the central computer for the engine, responsible for managing fuel injection, ignition timing, and other critical functions to ensure optimal performance and emissions. It is typically located in the engine bay or passenger compartment. This unit has dimensions of 0.18m x 0.16m x 0.045m and weighs 0.538 kg. Genuine OEM engine control units are essential for maintaining the precise calibration and firmware required for reliable engine operation and factory-set performance.