Genuine OEM Audi Coolant Hose, part number 1K0122157EF. This hose is designed to carry coolant between various engine components, playing a vital role in the engine's cooling system. The diagram indicates its position within the complex network of cooling lines. Weighing 0.136 kg and measuring 0.27 m in length, it is engineered for precise routing and fitment. Using a genuine OEM coolant hose ensures proper heat resistance, pressure integrity, and a leak-free connection, crucial for maintaining optimal engine temperature.