Genuine OEM Audi Engine Air Filter, part number 07L133843E. This essential component is designed to filter incoming air, preventing dust, pollen, and other contaminants from entering the engine's combustion chambers. It is typically located within the air intake system. The filter features pleated paper media with durable plastic end caps, measuring approximately 0.15m in diameter. Using a genuine OEM air filter guarantees optimal filtration efficiency, proper airflow, and a precise fit within the airbox, maintaining engine performance and longevity.