yeah over on 1addicts.com they said it is supposed to be 3372 and not 3732 for the 135i.
go here and scroll down a bit. it was verified because the automatic weight was listed near 3400, so it couldn't possibly make sense that the manual would be 3732.
http://www.1addicts.com/forums/showt...3372#post27215
possible that BMW either finger fudged the weight number on the M3 like they did on the 135i or there is some US emissions thing or other hardware we don't know about.