I have been chasing a vibration noise since I bought my 2005 Roush. It sounds like it is coming from the left rear high up. I thought I had found it 3 times. First time I found the left quarter panel louver to be loose when tapping on it. Took it off and went for a drive only to have the vibration show up again after a few miles. Second was the cover over the center light in the trunk. I removed it and at first no more vibration but it returned again after a few miles. Lastly I found...

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