Not sure I've ever heard of this being a "problem". It's a loose fitting part, so I'm sure it could rattle/vibrate under the right circumstances. A far reaching cause of such vibration could be weakening/broken mounts... engine/tranny mounts, but that's really pushing it IMO. I'd say there isn't a problem. I've never felt the button to see if it was vibrating because it is not at all an important part of the car.