The Genuine BMW Heater Hose - 64218391003 is a high-quality replacement part for BMW vehicles. This hose is responsible for carrying hot coolant from the engine to the heater core, which then provides warm air to the interior of the car. It is made from durable materials and designed to fit perfectly in your BMW, ensuring optimal performance and longevity. This heater hose is an essential component for maintaining a comfortable and functioning heating system in your vehicle.