Genuine OEM Volkswagen Fresh Air Flap, part number 561839113BCUBN. This component is responsible for controlling the flow of fresh air into the vehicle's cabin, contributing to the climate control system. It is located as part 20 in the diagram. The flap features a Satin Black/Chrome Matt Silk finish. Genuine OEM flaps are precisely engineered for smooth movement and accurate sealing, ensuring optimal performance of the heating and air conditioning system.