Genuine OEM Volkswagen Coolant Hose, part number 7E0121447A. This critical component is designed to reliably carry coolant throughout the engine cooling system, facilitating efficient heat transfer and maintaining optimal engine operating temperatures. It connects to the coolant expansion tank as part of the circulation path. With a weight of 0.071 kg and precise dimensions, this hose is manufactured to exact factory specifications. Using a genuine OEM coolant hose ensures proper fitment, material integrity, and resistance to temperature and pressure fluctuations, preventing leaks and system failures.