Genuine OEM Audi Coolant Hose with Coupling, part number 2Q0122101BA. This hose is a critical component of the engine cooling system, responsible for circulating coolant between various engine components and the radiator to regulate operating temperature. It features an integrated coupling for secure and leak-free connections within the cooling circuit. Weighing 0.287 kg and measuring 0.57 meters in length, this hose is designed to withstand high temperatures and pressures. Choosing a genuine OEM coolant hose ensures the correct material composition, precise molded shape for proper routing, and durable couplings, which are vital for preventing leaks and maintaining efficient engine cooling.