Genuine OEM Audi Coolant Hose, part number 4H0122109A. This hose is an integral part of the engine's cooling system, responsible for circulating coolant to maintain optimal operating temperatures. It connects to an auxiliary component within the cooling system, such as a pump or cooler, ensuring efficient heat exchange. Weighing 0.365 kg and measuring 0.56 m in length, it is designed for durability and precise fitment. Choosing a genuine OEM coolant hose guarantees correct routing geometry, resistance to high temperatures and pressures, and secure, leak-proof connections, which are vital for the overall health and performance of the engine.