Genuine OEM Audi Engine Control Unit, part number 05L906027CFFY0. This unit is the central computer that manages the engine's diesel injection, timing, and other critical functions. It is typically located in the engine bay, often within a protective housing. This control unit has a weight of 0.901 kg and dimensions of 0.21m x 0.185m x 0.04m. Genuine OEM ECUs are programmed with specific firmware and calibration data essential for the correct and efficient operation of the engine, ensuring factory-specified performance and emissions compliance.