I have a 2010 WRX Limited hatch which comes with the factory HID headlights. I notice over bumps when looking at the cutoff edge of the light I can see the lights shake. It doesn't happen on small bumps in the road, but uneven pavement or dips between intersections cause the headlights to jump around. It's nothing major, but it bugs me. I have never noticed this on other cars with HID headlights. My g/f has a 2007 Acura TL that I drive multiple times a week and I have never seen the lights shake on that car. I was just wondering if all of them did this, or maybe it's just my car? Her car doesn't have the leveling headlights so I'm wondering if that is the reason it shakes, since it can adjust up and down.
If anyone can offer their input that'd be great.