Genuine OEM Audi Coolant Hose, part number 4KE121611L. This hose is a critical component of the engine cooling system, responsible for circulating coolant throughout the engine to dissipate heat. It ensures the engine maintains its optimal operating temperature. Made from high-quality, heat-resistant rubber, this hose provides reliable fluid transfer. Choosing genuine OEM ensures the correct routing geometry and material resistance to engine coolants and temperatures.