The projector housing inside the headlight housing will break loose after time randomly and cause the headlight to be bouncing slightly up and down. One of my coworkers mentioned it to me after a long drive home which annoyed him so much for him to complain to me about it.
I went in to investigate and found that the assembly itself that is housed inside the clear casing is loose on the inside.
There are only 2 attachment points on the bottom. one is a silver phillips screw and the other one is the adjustment knob for the height of the headlight
There is a small rubber piece that goes inside the headlight in or around the Headlight adjustment screw:
One owner just placed the plastic around the headlight adjustment screw