Genuine OEM Audi Coolant Hose, part number 3C0122101BT. This hose is an essential component for the engine's cooling system, responsible for circulating coolant to maintain optimal operating temperatures. Manufactured from durable rubber, it is designed to withstand the high temperatures and pressures within the system. Choosing a genuine OEM hose ensures perfect fitment, leak-free performance, and the longevity required for reliable engine cooling.