Genuine OEM Audi Coolant Hose, part number 420819370A. This essential component is engineered to transport coolant efficiently between various engine components, playing a critical role in the vehicle's engine cooling system. It is typically located within the engine bay, connecting parts of the cooling circuit. Weighing 0.226 kg and measuring 0.426 m in length, this hose features a specific curved geometry for correct routing. Choosing a genuine OEM coolant hose ensures the use of high-quality, heat-resistant materials and precise internal diameters for optimal flow, preventing leaks and maintaining engine thermal stability.