Genuine OEM Audi Coolant Hose, part number 5QF122101BJ. This critical component is part of the engine cooling system, responsible for circulating coolant between various engine components and the radiator to dissipate heat. The hose features a complex, multi-branch design with integrated clamps for secure connections. Made from high-quality, heat-resistant rubber, it withstands high temperatures and pressures. Using a genuine OEM coolant hose ensures correct routing, leak-free performance, and long-term durability, preventing engine overheating.