There's a difficult to pinpoint rattle coming from the front passenger side dash / door area that i can't isolate.
It's more noticeable over rough pavenment especially concreate freeway and expansion joints.

Sounds like something is not secured properly and is rattling around. I thought it was the glovebox opening button but it isn't ....


Any ideas?

 

see if you have any sunglasses in the sunglass holder. I had a rattle noise before until I remove the my glasses.

 

also check and make sure the passenger seat belt is not rattling against the door frame..
I took mine in earlier this week for a couple rattles. One is coming from the subwoofer area and the other in the front dash above the nav. They had the car all day and said they tightened a couple bolts that were loose.
I still have the same rattles...

 

same thing here... took me a week to figure it out....

it'll rattle if u turn your stereo really loud too (which i tend to do all the time =P)