Guys my driver side mirror seems to really shake when im driving or have the tunes on. I have searched around and tried to tighten the 4 torx under the plastic cap, no effect; they were already tight! It seems its the plate that the glass mounts to that is loose, part 01 in the diagram from realOEM (RealOEM.com BMW E53 X5 3.0i Electrochromic outside mirror,bright-bl.

So my question is this: Does the mirror motor (part 01 from the above diagram) need to be replaced?