Genuine OEM Audi Washer Water Reservoir, part number 423955453A. This component serves as the primary storage tank for washer fluid, which is pumped to the windshield and other exterior cleaning nozzles. It is located in the front of the vehicle, typically near the engine bay or headlight assembly. The reservoir is made of durable plastic and includes necessary fittings for hoses and the pump. Genuine OEM parts guarantee precise fitment and material quality, ensuring the washer system operates effectively.