Genuine OEM Audi Engine Coolant Hose, part number 4M0819373AH. This critical component is designed to transport coolant efficiently throughout the engine cooling system, maintaining optimal engine operating temperatures. It is positioned as part of the intricate network of cooling lines. With a compact design, measuring approximately 13 cm long, 4.7 cm wide, and 3.5 cm high, it ensures a precise fit. Using a genuine OEM coolant hose guarantees the correct material composition, pressure resistance, and routing geometry for reliable, leak-free performance and long-term durability.