Genuine OEM Audi Coolant Hose, part number 2Q0122051AD. This hose is crucial for transporting coolant between the radiator and other engine cooling components, ensuring efficient heat exchange. It is positioned as a key connection in the lower cooling circuit. Made from durable rubber, it measures approximately 0.42 meters in length and weighs 0.37 kg. Choosing a genuine OEM coolant hose guarantees the correct material composition, pressure resistance, and precise routing geometry for a leak-free and reliable cooling system.