Genuine OEM Volkswagen Coolant System Quick-Acting Coupling, part number 5C0122291C. This component provides a quick and secure connection point for hoses within the vehicle's coolant system. It is typically found connecting various sections of the cooling circuit, ensuring proper fluid flow. Made from durable, heat-resistant plastic, this coupling is designed for long-term reliability. Choosing a genuine OEM coupling ensures precise fitment, leak-free performance, and resistance to the high temperatures and pressures of the cooling system, preventing coolant loss and engine damage.