Genuine OEM Volkswagen Radiator Coolant Hose Coupling Adapter, part number 5N0122291. This component is designed to securely connect coolant hoses within the engine cooling system. It ensures a leak-free pathway for coolant circulation, vital for engine temperature regulation. Constructed from high-quality, heat-resistant plastic, it provides a durable and reliable connection point. Opting for genuine OEM guarantees precise dimensions, material integrity, and resistance to thermal cycling and chemical degradation, preventing coolant leaks.