Genuine OEM Audi Engine Coolant Hose, part number 7L8121051B. This critical component is responsible for transferring engine coolant between various parts of the cooling system, ensuring efficient heat dissipation and maintaining optimal engine operating temperatures. It is a flexible, curved hose designed for a specific routing path within the engine bay. Measuring approximately 0.21m in length, 0.08m in width, and 0.055m in height, it weighs 0.069 kg. Using a genuine OEM coolant hose guarantees the correct material composition, pressure resistance, and precise routing geometry, which are essential for preventing leaks and ensuring the long-term reliability of the cooling system.