I posted this video a few weeks ago and I had brought it to the dealer and the problem was supposedly fixed. They told me that it was the Brake Vacuum Hose that was cracked. I thought, why would that make a rattling noise in the interior of the car?In the dashboard? But ok, you're the techs.... No. It was quiet for about 24 hours and it started to rattle again. It started out very light and now it's just as loud again, if not louder..... The car was emptied out for them so there was nothing to rattle. It sounds like there is something loose or broken within the dashboard. Can anyone help?!

 

I have a similar issue as well, I felt it is coming from the top of the dashboard, at the point where the instrument cluster meet with the top of the dashboard.

 

Maybe you can refer it : http://wasai117.pixnet.net/blog/post/460050599