My right xenon is not as bright as the left. The on-board computer doesn't give me any indication that it's not working, no warning. I only notice it when I pull into the driveway and see the reflection in the garage door window...or if I stand in front of the car and look at the lights. It doesn't bother my driving in the dark at all. It just bugs me that the headlights are asymmetric. What's the problem? I was thinking it might be the reflector bowl that is deteriorating...not reflecting well. Hence the lack of a warning signal. Any thoughts? What do I need to do to fix it? Thanks! -PSD