Genuine OEM Audi Engine Air Filter Housing, part number 4M0133837B. This essential component houses the engine's air filter, protecting the engine from dust, debris, and other contaminants. It is a key part of the engine's intake system, ensuring a steady supply of clean air. The housing is constructed from durable plastic and weighs approximately 3.114 kg. Choosing a genuine OEM air filter housing ensures precise fitment, proper sealing, and optimal airflow characteristics for engine longevity and efficiency.