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Hello. I am arriving a bit late to the game, however I have a few question I'd like someone to help me answer since I just bought a BM3 license and am preparing everything to flash.
These are regarding the ISTEP versions and BM3 ability to stock map.
Does BM3 create a backup of your stock map ? Or it has a generic map which applies to all N55 M2 ?
Does BM3 only touch the Engine and transmission ECU?
I was thinking about asking the dealer to update the car in the next oil change.
However I'm trying to understand if I can go back to the previous (BM3) backup, and even if it would allow me to backup a 2nd version after update.
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