Genuine OEM Volkswagen Coolant Hose, part number 3WA122051M. This hose transports coolant between engine components and the radiator, facilitating fluid transfer. It is located at position 16 in the cooling system assembly and features a quick-release mechanism for easy installation. Genuine OEM coolant hoses are manufactured to exact specifications to ensure proper flow and prevent leaks, maintaining optimal engine temperature and preventing costly damage.