The COBB Accessport v3 is the best tuning solution for your BMW N54. It is the most versatile and flexible handheld unit on the market. The Accessport v3 (APv3) offers a multi-gauge display to monitor any parameter/sensor on the vehicle (boost, oil temp, ignition timing etc.) It offers simple troubleshooting where one can read engine trouble codes to diagnose issues and clear them once resolved. It comes with various heavily tested Off-The-Shelf (OTS) maps for staged upgrade paths with various fuel types. The COBB APv3 can always be uninstalled and sold as a second hand unit when you move to your next vehicle.