Genuine OEM Audi Exhaust Gas Turbocharger, part number 03L145701E. This turbocharger is responsible for forcing compressed air into the engine cylinders to increase power output. It is a critical component of the engine's intake system. The turbocharger assembly includes the turbine and compressor housings. Genuine OEM parts ensure precise fitment and optimal performance, as they are manufactured to the exact specifications of the original component.