Genuine OEM Volkswagen Radiator Air Duct, part number 5NA121283BB. This component is designed to guide ambient air efficiently towards the radiator, optimizing the engine's cooling performance. It is installed on the left side of the vehicle's cooling system. Constructed from durable black plastic, it is engineered to withstand engine bay temperatures and vibrations. Using a genuine OEM air duct ensures precise routing geometry and material integrity for effective cooling.