Genuine OEM Audi Heater Water Hose Pipe, part number 5Q0819350B. This component is crucial for the vehicle's heating system, responsible for conveying hot water or coolant to the heater core to provide cabin warmth. The diagram shows it as a pair of parallel hoses, precisely routed within the heating assembly. Weighing approximately 0.38 kg and measuring 0.525 meters in length, this hose pipe is constructed from robust materials designed to withstand continuous exposure to hot coolant and pressure. Choosing a genuine OEM heater hose ensures the correct material composition, precise bends, and secure connections, preventing leaks and maintaining efficient operation of the heating and ventilation system.