Genuine OEM Audi Engine Coolant Hose, part number 04L121157T. This flexible hose is a critical part of the engine cooling system, responsible for carrying coolant to regulate engine temperature. It connects to a pipe leading to a heat exchanger, facilitating the transfer of heat. Weighing 0.047 kg and measuring 0.153m in length, this hose is designed for specific routing and performance. Choosing genuine OEM ensures the correct routing geometry, flexibility, and resistance to coolant chemicals and high temperatures.