Genuine OEM Audi Radiator Coolant Hose, part number 6R0122051AD. This critical component is responsible for circulating engine coolant to and from the radiator, ensuring optimal engine operating temperature. It is positioned within the engine cooling system, connecting directly to the radiator. Constructed from durable, heat-resistant rubber, it maintains integrity under varying temperatures and pressures. Using a genuine OEM hose guarantees correct routing, precise fitment, and resistance to coolant chemicals, preventing leaks and system failures.