Genuine OEM Audi Front Bumper Air Duct, part number 4KE121763C9B9. This air duct is located on the left side within the front bumper assembly and is crucial for directing airflow to various components, such as radiators or brakes. It features a satin black (9B9) finish. Using a genuine OEM air duct ensures precise fitment and optimal airflow characteristics, which are vital for proper cooling and aerodynamic performance.