Genuine OEM Volkswagen Engine Coolant Hose, part number 2Q0122109Q. This hose is a critical component of the engine cooling system, responsible for transporting coolant between various parts like the expansion tank and radiator to maintain optimal engine operating temperature. Weighing approximately 0.0641 kg and measuring 0.25 m in length, this genuine OEM hose ensures correct routing geometry, resistance to engine fluids, and high-temperature durability for reliable cooling system performance.