I was driving home from school today and I heard a rattling like a trunk with a sub in it on a sedan. I got home and tried to pinpoint it and realized it's coming from these two vent looking things in the door jam. There's one on each side and it feels like they're ports for the sail panel speakers. What exactly are these and how can I stop this annoying buzzing?
David

 

Take those vents out and pull off the rubber/paper (mine were paper) vent cover. That's what you're hearing. Then reinstall them.

AJ

 

Thanks for the help, it was really annoying and I'm glad it was any easy fix. Thanks again.
David