Genuine OEM Audi Engine Coolant Hose, part number 4KE121550F. This hose is designed to transport coolant efficiently within the engine cooling system, maintaining optimal engine operating temperatures. It is part of the complex network of hoses connecting various cooling components. Made from high-quality, heat-resistant rubber, it ensures durability and leak-free performance. Choosing genuine OEM guarantees the correct routing geometry and resistance to engine fluids for reliable operation.