Who said I didn't Know what I was doing?

I asked what common faults these cars have, having never owned an m3 or ever driven 1 myself. I know there's a few owners on here and though it would ask there opinion.

I've heard horror stories about rear sub frames etc so was looking to see what problems people have experienced with these cars

Oh, and the reason I'm helping my mate out is because he's away Working for 3 weeks and can't do it himself