Genuine OEM Audi Air Filter Box, part number 8R0133837S. This critical component serves as the housing for the engine's air filter, protecting it from debris and ensuring a sealed environment for clean air intake. It is an integral part of the vehicle's intake system, directing filtered air to the engine. Constructed from durable plastic, this air filter box weighs 2.443 kg and measures approximately 0.405 meters in length. Choosing a genuine OEM air filter box ensures precise fitment, proper sealing, and optimal airflow characteristics, which are crucial for engine efficiency and longevity.