If you're like me and got the wrong style of indicator/signal for your pre-facelift E46, specifically the earlier “clip-in” style indicators for your “screw-in” style headlights, this bracket will allow you to mount your older style indicators on your newer style headlight housings without any modifications to either part. 

For installation, you first clip in the bracket onto your indicators, then you screw in the bracket onto your headlight housing. If your original indicator “screw washer”, the tall plastic grey piece that has the screw inside is still intact, you can try to use that or use the washer I designed to utilize a standard M5x20 screw.

I already had the headlights out while I designed the bracket so you may have to pull out your headlight to attach everything together, then install onto the car. Also given the different indicators, I dont know if it will work on E46 sedan/touring headlights and indicators but it should work on convertible ones.