I took off the entire roof plastic set-up as soon as I got it home...once gone, the sun roof works, etc.

The sun roofs that steal head room are the sliding ones, this one just pivots up like a vent window...so there's no loss in head room.



I think the slight color variation you mention on '01's, etc... is from fading in the sunlight/weather, etc....there are plastic treatments you can apply to protect it from further damage.

(I can't see from the picture what you mean though)

So - if you mean something else, look underneath at the mounting points for the bumper, and see if there's any sign of tweaking/damage (Replaced parts, etc...)