Genuine OEM Audi Coolant Hose, part number 4G0819374L. This hose is an essential part of the engine cooling system, responsible for transporting coolant to maintain optimal engine operating temperatures. It is a molded rubber hose, approximately 28.5 cm long, designed to withstand the high temperatures and pressures of the cooling system. Using a genuine OEM coolant hose ensures precise fitment, leak-free performance, and durability against thermal cycling and coolant degradation, protecting the engine from overheating.