Genuine OEM Audi Engine Heating Hose, part number 4K0819334L. This hose is responsible for circulating heated coolant from the engine to the heater core, providing warmth to the vehicle's cabin. It is integrated into the cooling system, connecting components that manage heat transfer for interior comfort. Constructed from durable, heat-resistant rubber, it weighs 0.13 kg. A genuine OEM heating hose ensures precise routing, leak-free connections, and resilience against high temperatures and pressures, crucial for efficient cabin heating and cooling system integrity.