Get slightly higher wall tires. I got 225/45/18 instead of 225/40/18. This helped tremendously. My winter wheels (225/45/17) gave me a smooth ride, but 2 sets of summer tires (225/40) gave an horrible ride on bad pavement. No wonder that BMW updated their 18" on the F30 with 225/45 profile. Much better.
Check for any sign of seepage on the shocks. If there is any, they may not doing their job. My car wasn't bouncing excessively yet there was some sign of a leak. I changed the front shocks; one of them was clearly shot. BTW, I have a lowered car and ride with the changes I just mentioned is very good.
2007 E90 AW 323i Step | Lowered 1.25"/1" | BMW Performance Exhaust | Debadged | Scangauge II | Style 162 18" & 161 17" wheels & rear 15mm spacers
Last edited by Saintor; 11-25-2012 at 05:10 AM.