Genuine OEM Audi Air Filter Box, part number 4K0133838AC. This component is designed to house and protect the engine's air filter, ensuring that only clean, filtered air enters the intake system for optimal combustion. It is positioned within the engine bay as part of the air intake assembly. Weighing approximately 2.061 kg, this air filter box is constructed from durable plastic to withstand engine bay temperatures and vibrations. Choosing a genuine OEM air filter box ensures exact mounting points, proper sealing, and optimal airflow characteristics, which are crucial for engine efficiency and longevity.