The Genuine BMW HVAC Heater Hose - 64213400416 is a high-quality replacement part for BMW vehicles. It is specifically designed to be used in the heating, ventilation, and air conditioning system of the vehicle. This hose is responsible for carrying hot coolant from the engine to the heater core, where it is used to warm the air that is circulated inside the vehicle. It is made from durable materials to withstand high temperatures and ensure long-lasting performance. This product is an authentic BMW part and is compatible with various BMW models.