Genuine OEM Audi Coolant Hose, part number 7L8121051G. This reinforced rubber hose is a critical component of the engine cooling system, responsible for transferring coolant between the radiator and other engine cooling components. Weighing 0.424 kg and measuring 0.47 meters in length, a genuine OEM coolant hose ensures proper routing, resistance to high temperatures and pressures, and a leak-free connection, which is vital for preventing engine overheating and maintaining system integrity.