Genuine OEM Audi Coolant Hose with Clutch, part number 4K0122101BJ. This hose is an integral part of the engine cooling system, responsible for circulating coolant to maintain optimal engine operating temperatures. It incorporates a specialized clutch mechanism for specific system requirements. Positioned within the engine bay's complex hose network, it is constructed from durable, heat-resistant rubber to withstand high pressures and temperatures. Using a genuine OEM hose ensures precise fitment, proper sealing, and the correct functionality of any integrated components, critical for preventing leaks and maintaining engine health.