I believe the most accurate information can be found here.
http://www.navigation.com/is-bin/INT...llProducts=YES

When you open that page you see that BMW has NAV MAPS for several types of BMW's.
That leads me to believe that each of them are unique to the specific vehicle and hardware. But to make sure why not give their site a look see.

Cant go wrong with e-mailing them

http://www.navigation.com/is-bin/INT...CB0000_K1jAsSA

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….