Genuine OEM Volkswagen Coolant Hose, part number 2H6121157K. This hose connects components within the engine's cooling system to allow coolant flow. It is located at position 5 in the cooling system assembly. The hose has a length of 0.31 meters and a width of 0.33 meters. Genuine OEM coolant hoses are manufactured to precise specifications to ensure proper fit and resistance to heat and pressure, preventing leaks and maintaining engine cooling efficiency.