Genuine OEM Audi Engine Heater Hose, part number 4K0819460. This hose is an essential component within the engine's cooling and heating system, responsible for transferring heated fluid to various engine components. It connects to the radiator and other parts of the engine's thermal management circuit. The hose measures approximately 0.578 m in length and weighs about 0.625 kg. Choosing a genuine OEM hose ensures the correct routing geometry, material resistance to high temperatures and pressures, and long-term durability, preventing leaks and maintaining efficient engine cooling.