Genuine OEM Volkswagen Engine Coolant Hose, part number 5Q0121063N. This hose is a critical component of the engine cooling system, responsible for conveying hot and cold coolant between various parts like the radiator, engine block, and heater core. It is positioned within the engine bay, connecting specific cooling system components. Weighing 0.124 kg and measuring 0.27m x 0.16m x 0.055m, this hose is constructed to withstand high temperatures and pressures. Opting for a genuine OEM coolant hose ensures precise routing, proper material composition for heat and chemical resistance, and leak-free connections, which are vital for preventing engine overheating and maintaining system integrity.