With the summer in full effect I now have windows open and I am hearing some strange rattle from driver's side when going over little bumps (deviders or cat eye, not sure what they called) It sounds like something came loose, but I can't figure out what it is. Have you heard anything like that or can you try it on yours? I thought I was imaging things, but I've tried the same test on our other car (08 Sentra) and it was fine.

 

Could be a CV clattering.

 

It could be the side view mirror. The plastic piece that is on the underside wasn't fixed on all '08's, mine included.

 

Mine rattles too but I hear it in the headliner...

Have been too lazy to take it to the dealer. I very rarely have the radio down anyway.