Genuine OEM Volkswagen Coolant Hose, part number 5Q0122051AN. This critical component is responsible for circulating engine coolant between various parts of the cooling system, such as the radiator and engine block, to regulate temperature. It is an integral part of the engine cooling assembly, designed with specific bends and connection points. Constructed from durable rubber and plastic, it weighs approximately 0.64 kg and measures about 41.5 cm in length. Using a genuine OEM coolant hose ensures precise routing geometry, resistance to high temperatures and pressures, and long-term reliability without leaks or premature failure.