Headlight Options?

[Henn28]

Can someone explain why I can't upgrade to the xenons that became available in late '03 I think? They look great and seem to be available, but never come up as a match for my '02 4.4L.

I think at some point they went to self leveling for the X5, but wouldn't the lights still light up if you put them in an '02? Or did the physical shape change in some way from 02 to 03?

I'm sick of the crappy looking, hazed over lights in my 02 x5 and really don't want to engage in another polish job that won't last long.