Originally Posted by dflwshaft

I updated my 540 to halo lights and it work fine save one issue.

The first question is if you had xenon's before the face lift or if you were upgrading to xenons. If you had them before, all the plugs should work (don't forget the self-leveling plug).

You may have trouble gettng power to the halo's. My upgrade kit came with a pigtail connector for the halo's that didn't really work like I wanted, but to fix it would require that I hack some wires which I am reluctant to do.

I'm not sure what you can do with programming the light control module. Furthermore, I'm not sure replacing the wiring harness for the front lights will be compatible with your current light control module. Unfortunately, you won't know until you buy all the parts and spend a day working on it.

If you didn't have xenon's before the update, I can't help. It'll be a total hack, but it can be done. I just don't like going that far because the electronics in BMW's seem to be rather sensitive.