Genuine OEM Audi Coolant Hose With Heater Valve, part number 7P6122157E. This hose is a vital part of the engine cooling and HVAC system, responsible for carrying hot coolant and regulating its flow to the heater core for cabin heating. It is located within the engine bay, connecting to the cooling system and heater core. Weighing 0.789 kg, this assembly ensures precise coolant management. Choosing a genuine OEM coolant hose with heater valve guarantees the correct material resistance to heat and pressure, proper valve function, and exact routing for reliable engine temperature control and cabin comfort.