@ mikex101: N49 engine? I have never heard of that engine in E90
lots of problems mate.
I own a 320i N46 7/2007 with only 2 mechanical problems, an alternator pulley and a left tie rod ( No 4 in image:
http://www.realoem.com/bmw/showparts...10&hg=32&fg=25 )
I guess I am lucky