Genuine OEM Volkswagen Coolant Hose, part number 2N0122101F. This hose transports coolant between engine components to regulate engine temperature. It is located in the engine cooling system. The hose is made of durable rubber material designed to withstand high temperatures and pressures. Genuine OEM coolant hoses are manufactured to exact specifications, ensuring proper flow and preventing leaks, which is critical for engine longevity.