Just seeing if anyone is having the same problem. I have a 02 p5 and when ever I hit a bump there is a rattle under the dash. It just started a couple of weeks ago. I have an after market deck and alarm, that might be one of those but It never happened before. All the wires are tied up good. If you have the same problem and have fixed it let me know!

Thanks

 

Have you checked the cigarette tray? I know that sometimes while listening to music, that rattles and I have to push on it for half a minute and it goes away.