I installed the v200 Stage 1 Aggressive map on my n55 135i. It's muuuuuuuuuuuch smoother. I used to get hesitation and stumbling, but no more.
You should do a complete accessport uninstall and firmware update to install the new maps. It's saweet. I see now that there's a sale on fmic... might have to jump on that
http://www.cobbtuning.com/BMW-1-3-Se...r-p/7b1500.htm