Genuine OEM Volkswagen Engine Coolant Hose, part number 5N0122157BP. This flexible hose is a crucial component of the engine cooling system, responsible for circulating coolant between the engine, radiator, and other cooling system parts to dissipate heat. It is integrated into the engine's thermal management system. Weighing 0.344 kg and measuring 0.4 m in length, this hose is engineered for durability and resistance to high temperatures and pressures. Using a genuine OEM coolant hose ensures correct routing, material composition, and resistance to degradation from coolant chemicals, preventing leaks and maintaining efficient engine cooling.