Genuine OEM Audi Lower Radiator Coolant Hose, part number 1J0122051H. This critical component of the engine cooling system is responsible for carrying cooled fluid from the radiator back to the engine, maintaining optimal operating temperatures. It is positioned as the lower connection to the radiator. Constructed from high-quality, heat-resistant rubber with a molded shape for precise routing, it ensures a leak-free and durable connection. Choosing genuine OEM ensures the correct material composition, pressure resistance, and exact routing geometry for reliable cooling system performance.