I wonder if something in the shocks - upper shock mount, or other mount part is not installed correctly. Recall Steve's info about dealer and non-dealer parts. As for me, I have at least one bad tire that can be attributed to my (second) vibration. Why the tire went bad, I am not sure (Yoko) but it is being replaced by tirerack. The harsh vibration that I used to have, went away with control arm replacement and has not come back, I think I've driven about 1500-2000 miles since.