This product is a genuine BMW heater hose designed to connect the engine inlet to the heater valve. It has a part number of 64218391005 and is made specifically for BMW vehicles. The hose is an important component of the heating system, allowing hot coolant to flow from the engine to the heater valve, which then distributes the heat throughout the car's interior. This hose is made with high-quality materials to ensure durability and proper function. It is an essential part for maintaining a functional heating system in a BMW vehicle.