Genuine OEM Audi Coolant Line, part number 4G0121081DM. This line is designed to transport coolant within the engine cooling system, connecting various components to facilitate heat exchange and maintain optimal engine operating temperatures. It is located in the rear section of the cooling system assembly. Weighing 0.0636 kg and measuring approximately 0.59m in length, it is constructed from high-quality, heat-resistant materials. Using a genuine OEM coolant line ensures precise fitment, proper routing, and long-term durability, preventing leaks and maintaining cooling system integrity.