Genuine OEM Audi Engine Coolant Hose, part number 4K0122109T. This essential hose is responsible for circulating coolant throughout the engine cooling system, helping to maintain optimal operating temperatures. It connects various components within the engine cooling circuit, including the thermostat housing. Weighing approximately 0.36 kg and measuring 0.35 meters in length, this hose is designed for durability. Choosing a genuine OEM coolant hose ensures correct routing, heat resistance, and secure, leak-free connections, vital for preventing engine overheating.