Genuine OEM Volkswagen Coolant Hose, part number 2N0122051N. This hose transports coolant between engine components to regulate engine temperature. It is located at position 4 in the cooling system assembly. The hose has a length of 0.31 meters and a weight of 0.37 kg. Genuine OEM coolant hoses are manufactured to exact specifications to ensure proper flow and prevent leaks, maintaining the integrity of the cooling system.