I've had a constant buzzing noise on the interior of my car for a couple months and the other night I asked my wife if she could hear the noise and told her it sounded like it was coming from the passenger door area. She said that she heard it but it sounded like it was coming from the driver's side. I told her that I was sure it was coming from the passenger side. I finally got it into my Dealer and they made short work of the issue, apparently it wasn't coming from either side. After the service tech (Ben) finished, we went for a test drive and sure enough it was gone. He said that he had the same thing happen in his Dodge Avenger, my rear view mirror was just a bit loose. While I was there they checked another couple things out for me and gave me a free wheel balance to boot. My Service Advisor is David and my Dealer is Rick Hendrick's North Dodge in Charleston, SC (home of the MOPAR Supercenter). They have excellent customer service in Sales and Service and the right folks to take care of you.