This air filter element captures airborne particulate before it enters the engine intake system. It is installed in the housing on the engine, upstream of the mass airflow sensor and turbocharger inlet. A clogged element restricts airflow, causing a drop in engine power and increased fuel consumption. The manufacturer designed this component to match the original housing’s seal geometry, ensuring the filter seats correctly and prevents unfiltered air from bypassing the media. On reinstallation, verify the housing seal is clean and the cover is fully latched.