Genuine OEM Audi Coolant Hose, part number 1K0121157EK. This essential component is designed to transport coolant efficiently between various engine components, playing a critical role in maintaining optimal engine operating temperatures. Made from durable, heat-resistant rubber, it weighs approximately 0.155 kg. Opting for a genuine OEM coolant hose guarantees the correct routing geometry, material composition for chemical resistance, and precise fitment to prevent leaks and ensure reliable cooling system performance.