Another option for bi-xenons: Magneti Marelli OEM replacements
So I've been considering getting my ZKWs fixed or replaced or rebuilding them etc. Them suffer from the same burnt projector bowls that everyone else has in their ZKWs.
My friend who owns a BMW repair shop looked up the part # for the bi-xenon sedan replacement using the aftermarket parts company they use as a supplier and found these:
Magneti Marelli
http://www.bigpatsfans.com/magnetimarelli.jpg
The pair would be about $1k total and would have a 2 year warranty on them. The $1k includes bulbs, ballasts etc--everything. They are factory screw in, fully plug and play, etc.
After a bit of research, I have determined that Magneti Marelli is BMW OEM supplier "AL." These replacement headlights are indeed OEM AL bi-xenons!. The replacements are full headlight assemblies--ballasts, bulbs, housings etc. They are a direct fit and direct plug and play for your old headlights.
Jump down a few posts to see pictures of the headlights in the boxes, installed and the cutoff line.