How to find your version
In your BMW: Settings → Software update → Show current version
The version string starts with two letters followed by three groups of numbers, for example MN-003.011.002. Enter it exactly as shown.
The two-letter prefix identifies your head unit family and is the key to finding the right file:
MN / TN / HN — NBT Evo (i3, i8 and many 2013–2018 models)
MV / TV / HV — Alternative head unit variant
MB / TB / HB — Pro-nav with DVD
MT / TT / HT — TT/MT head unit variant
Your VIN is on the dashboard (visible through the windscreen) and on your registration document. Providing it confirms your vehicle model and year.