The Genuine BMW Air Duct Transmission - 51718041363 is a part that is used in BMW vehicles to direct air flow to the transmission system. It is a genuine BMW product and is designed specifically for use in BMW vehicles. This air duct helps to ensure proper cooling and ventilation for the transmission, which is essential for optimal performance and longevity. It is made from high-quality materials and is a crucial component for the smooth operation of the transmission system in BMW vehicles.