Genuine OEM Volkswagen Fan Motor Control Unit, part number 2H0919064. This unit regulates the speed of the engine cooling fan based on temperature and system demands. It is identified as item 24 in the diagram, located within the engine cooling system assembly. The unit has dimensions of 0.05m length, 0.03m width, and 0.035m height, with a weight of 0.039 kg. Genuine OEM fan motor control units ensure optimal engine temperature regulation and prevent overheating.