I have the upgraded Sony stereo in my Focus. Today I had a vibration in my driver side rear door during some bass heavy music I was playing. Any tips for fixing it? I played with it a bit when I got home but could not find any obvious issues. Seems to be as secure as my passenger rear door and no loose trim anywhere.... I will have the dealer take a look but in my past experiences dealers suck at fixing that stuff.
Thanks.
Thanks.