This is the latest and last update for the end of life sync 2 system. EA5T-14D544-BA SYNC2 - V3.10. If you have the original 4. So if you bought a newer map sd card ( A6, A7, A8, A9, A10, A11, B6, B8, B9, B10, B11) and it doesn't work, or you are having issues with your system you will need to do this update.