Genuine OEM Volkswagen Coolant Hose, part number 7N0122157AS. This hose connects engine components to facilitate the flow of coolant for temperature regulation. It is located at position 9 in the cooling system assembly. This part weighs 0.166 kg and has a length of 0.325 m. Genuine OEM coolant hoses are manufactured to exact specifications, ensuring proper fitment and resistance to heat and pressure, which is critical for preventing leaks and maintaining engine health.