Well I know many people who have BMW's and it is true that there always seems to be a whole lot of problems with these cars. My uncle has a 535 from 2006 and the transmission already went out. My friend was gonna buy an M3 but the guy at the dealership told him that he was gonna have way too many problems with it so he copped a G35.

And all the servicing will be expensive if you get stuff done through the dealership cause they overprice stuff like crazy. Unless you can find a certified BMW mechanic that does his own work out of his garage.