This is exactly what happened to my right headlight. The white piece snapped between the physical headlight and the adjustment screw. Incredibly frustrating! I spent several hours with the headlight on my kitchen table trying to reattach the two ends with guerilla glue, but the repair only held for a day or two. I ended up biting the bullet and getting lci headlights to replace my pre-lci's. Planning on selling off most of the internals, and hopefully the complete left headlight, and maybe rip into the broken on and see if a solution can be found. Shitty design on bmw's part to make this stuff so hard to get to without taking the entire headlight apart.
'07 335xi, Alpine White
| Cold, "Sport", and Luxury packages | Tinted | OEM Black Lines | JB4 | DCI | ER FMIC | Forge DV's | Custom exhaust with secondary cat delete, Magnaflow mufflers, black Dimisa Tips | Staggered 18" V718's, Matte Black | Flappy Paddles | Titanium CF Trim Wrap | BMW Performance Shifter and E-Brake Handle |