Genuine OEM Audi Left Radiator Air Guide, part number 5NN121283D. This shaped plastic component is positioned on the left side of the radiator assembly. Its function is to precisely direct incoming airflow to critical cooling system components, optimizing heat dissipation and ensuring efficient engine temperature regulation. Weighing 0.17 kg, it measures 0.585 m in length. Using a genuine OEM air guide ensures correct aerodynamic properties and durable material, crucial for maintaining effective engine cooling and preventing overheating.