Genuine OEM Volkswagen Windscreen Washer Reservoir Cap, part number 2E0955455. This cap is designed to securely seal the filler neck of the windscreen washer fluid reservoir. It is positioned at the top of the reservoir, providing access for refilling while preventing debris from entering the system. Made from durable plastic, it ensures a tight seal against splashes and evaporation. Using a genuine OEM reservoir cap guarantees a precise fit and proper sealing, protecting the washer system from contaminants and ensuring reliable operation of the windscreen washers.