Genuine OEM Volkswagen Coolant Hose, part number 2Q0122101AT. This critical component is part of the engine cooling system, responsible for circulating coolant between the engine and radiator to maintain optimal operating temperatures. Constructed from durable, heat-resistant rubber, it is designed with specific bends for precise routing within the engine bay. Using a genuine OEM coolant hose ensures proper fitment, resistance to high temperatures and pressures, and chemical compatibility with engine coolants, preventing leaks and maintaining efficient engine cooling.