Genuine OEM Audi Engine Coolant Hose, part number 4K0145909J. This critical component is part of the engine cooling system, designed to transport coolant efficiently to maintain optimal engine operating temperatures. Its specific routing and connections are visible in the cooling assembly diagram. Weighing 0.32 kg and measuring 0.46 m in length, this hose is engineered for durability. Choosing a genuine OEM coolant hose ensures correct material composition, pressure resistance, and exact routing geometry for reliable performance and leak prevention.