Genuine OEM Audi Heater Core Coolant Hose, part number 8K1819371AB. This hose is a vital component of the vehicle's heating and cooling system, responsible for transporting hot engine coolant to the heater core. This process enables the cabin heating system to function effectively. Made from durable, heat-resistant rubber, this hose weighs 0.156 kg and measures 0.37 meters in length. Using a genuine OEM hose ensures correct routing, proper fluid resistance, and a secure connection, preventing leaks and maintaining optimal heating performance.