Genuine OEM Audi Coolant Hose, part number 4K1819344G. This hose is a vital component of the engine cooling system, responsible for circulating coolant to maintain optimal engine operating temperatures. It features a quick-release coupling for efficient and secure connections within the cooling circuit, connecting to the expansion tank. Weighing 0.526 kg and measuring 0.52 m in length, it is engineered for specific routing and pressure. Using genuine OEM hoses ensures correct material flexibility, heat resistance, and precise fitment of couplings, preventing leaks and maintaining system integrity.