Genuine OEM Audi Coolant Hose, part number 5QF122051CQ. This hose is a critical part of the engine cooling system, responsible for circulating coolant between the engine, radiator, and other cooling components. It is designed to withstand high temperatures and pressures encountered during operation. The hose connects to the radiator and other parts of the cooling circuit. Genuine OEM parts ensure the correct material composition, flexibility, and durability required for effective and safe engine cooling, preventing leaks and maintaining optimal operating temperatures.