I was driving locally on Sunday when I began to notice a metallic scraping noise the would change with speed. I pulled into my driveway to check if anything came loose, but I couldn't see anything hanging from the vehicle. I checked the rear brakes since it that was the most obvious place where the noise would be coming from, but they looked okay. I called Tesla customer support, but they were closed for the weekend. I waited a half hour and then tried driving again. The scraping noise was still there. I drove for a few blocks and then pulled into a gas station to pick up something from the convenience store. When I pulled away, the noise was gone and has not returned.
I called Tesla service at 9 AM on Monday and they said it could have been a rock got stuck in the brake pad and then dislodged itself. I've never heard that happening, not even on any of the Tesla forums, but the service-person said that it happens from time-to-time.
Has this ever happened to anyone?