Genuine OEM Audi Coolant Hose, part number 12E819337M. This critical component is responsible for transporting coolant throughout the engine cooling system, ensuring efficient heat dissipation and maintaining optimal engine operating temperatures. As a connecting hose, it forms a vital part of the fluid circuit. Weighing approximately 0.539 kg and measuring 0.53 meters in length, this hose is engineered for precise routing and fluid resistance. Using a genuine OEM coolant hose guarantees the correct material composition, pressure resistance, and exact routing geometry, preventing leaks and ensuring the long-term reliability of the cooling system.