Genuine OEM Volkswagen Coolant Hose, part number 04E122447BJ. This hose is a vital component of the engine cooling system, responsible for transporting coolant between the expansion tank and other cooling system parts. It ensures efficient heat transfer and maintains the engine's optimal operating temperature. Weighing 0.205 kg and measuring 0.5 m in length, this genuine OEM hose provides the precise routing geometry and material resistance to withstand high temperatures and pressures, preventing leaks and ensuring long-term reliability.