I just purchased a 2006 focus zx5. The only problem with it is an annoying squeak and faint rattle that occurs whenever the car shakes. It of course is much loader when I go over a bump. The noise is coming from the outside of the car by the right back tire. I thought it might be the shocks, but the dealer replaced the shocks and struts and the noise remained. Any ideas? I am not very mechanically inclined, so I do not know how to trouble shoot this problem.