Genuine OEM Volkswagen Coolant Hose, part number 3Q0121051E. This hose is a critical component of the engine cooling system, responsible for circulating coolant to maintain optimal engine operating temperatures. Its specific shape and routing ensure proper flow and connection between the radiator and other cooling system components. Positioned within the engine bay, it is designed to withstand the high temperatures and pressures of the cooling system. Weighing 0.188 kg, this hose is manufactured to precise specifications. Using a genuine OEM coolant hose ensures resistance to thermal cycling and chemical degradation, preventing leaks and maintaining the efficiency and reliability of the engine's cooling.