Genuine OEM Volkswagen Auxiliary Heater Coolant Hose, part number 1K0819350B. This hose is designed to transport engine coolant to and from the auxiliary heating system, facilitating efficient cabin heating. It is positioned within the engine bay, connecting the auxiliary heater to the cooling circuit. Weighing 0.131 kg, this hose is constructed from durable, heat-resistant rubber. Using a genuine OEM hose ensures correct routing, proper fluid resistance, and a leak-free connection, critical for the cooling system's reliability.