my 2007 infiniti g35 which has a little over 150K miles on it has started squeaking and has a slight rattle when going over speed bumps at a slow rate of speed. It seems to be worse in excessively warm weather (95 plus degrees)... Any ideas on what may need to be replaced? I have had the car checked several times but the dealer/mechanic can't seem to find the issue.

 

Do a search in the forum and you'll find there are multiple possible causes for your noises, especially on a car with 150K miles.