The Genuine BMW Radiator Support Air Duct - 51747290604 is a replacement part for BMW vehicles. It is designed to fit onto the radiator support and direct airflow to the radiator, helping to keep the engine cool. This air duct is made from high-quality materials and is an exact match for the original part, ensuring proper fit and function. It is an essential component for maintaining proper engine temperature and preventing overheating. This product is manufactured by BMW and is an authentic, OEM part.