Genuine OEM Audi Fast Release Coolant Hose, part number 5QF122101E. This hose is a vital component of the engine cooling system, responsible for transporting coolant between various engine components. Its 'fast release' design allows for efficient connection and disconnection during maintenance. It is situated within the engine cooling assembly. Made from durable, heat-resistant rubber or synthetic materials, it measures approximately 0.22 meters in length. Using a genuine OEM coolant hose guarantees the correct material composition, pressure rating, and precise routing, which is essential for preventing leaks and maintaining efficient engine temperature regulation.