Here's a video
on the process (as posted by MattyGigawatts). I would skip the first minute with the FSC code stuff and just try loading the maps. Come back to that other stuff later if
you get asked for an FSC code.
I'm not sure it's ok to post the links here (someone correct me if I'm wrong), but there are several places to download the map data for free via bittorrent. The key is to search for BMW North America NEXT 2018-1
. That is current as of now, but sometime this year you can expect 2018-2 to be released.
My car has the tech package and I'm unsure if the same "NEXT" maps are used for cars without the tech package?