This product is a genuine BMW heater duct for the rear left front section of a vehicle. It has the part number 51477148529. This duct is designed to direct hot air from the heating system to the rear left area of the vehicle, providing warmth and comfort for passengers. It is a high-quality, durable component that is specifically designed for use in BMW vehicles. This heater duct is an essential part of the heating system and ensures proper distribution of warm air throughout the vehicle.