Genuine OEM Volkswagen Radiator Flap, part number 5QM121223. This part functions as a radiator flap, controlling the flow of air through the radiator to optimize engine cooling and aerodynamic efficiency. It is located in the front of the vehicle, integrated with the radiator assembly, as shown in the diagram. The flap has a length of 0.137m and a width of 0.04m. Genuine OEM radiator flaps are crucial for maintaining precise airflow control and ensuring the longevity of the cooling system.