Genuine OEM Volkswagen Windscreen Washer Tank Reservoir, part number 3AA955453H. This reservoir stores fluid for the windscreen washer system, ensuring a consistent supply for cleaning the windscreen. It is typically located in the engine bay. Constructed from robust, automotive-grade plastic, it is designed for durability and chemical resistance. Using a genuine OEM reservoir ensures proper fitment, leak-free operation, and compatibility with the vehicle's existing washer system components.