Genuine OEM Audi Additional Coolant Cooler, part number 4F0121212H. This component provides supplementary cooling for the engine coolant, helping to maintain optimal operating temperatures. It is positioned on the left side of the vehicle's cooling system assembly. Weighing approximately 1.77 kg, this cooler measures 0.37m in length, 0.24m in width, and 0.155m in height. Choosing a genuine OEM cooler ensures precise fitment, efficient heat exchange, and long-term durability, critical for engine health.