Genuine OEM Audi Engine Coolant Hose, part number 03L121157AJ. This essential component is responsible for transporting coolant between various engine components, crucial for maintaining optimal engine operating temperatures. It is a curved hose, weighing approximately 0.028 kg and measuring about 0.09 meters in length. Choosing a genuine OEM coolant hose guarantees the correct material composition, heat resistance, and precise routing geometry for a leak-free and reliable cooling system.