The Genuine BMW HVAC Heater Hose - 64216983858 is a high-quality, OEM replacement part for BMW vehicles. This heater hose is designed to connect the engine coolant system to the heating and air conditioning system, allowing for proper circulation of coolant to regulate the temperature inside the vehicle. It is made from durable materials and is designed to withstand high temperatures and pressure. This heater hose is an essential component for maintaining the proper functioning of the heating and cooling system in your BMW.