Sorry man! Had the same thing happen to me with previous 335i, but luckly caught the person before he drove off. Also had to replace bumper. Time to replace with a Euro bumper.
Akra Evo / MS stage 2 / MS UDP / VF Tune / KW Clubsports Coilovers / Vorshlag plates / TMS Delrin Subframe and Diff Bushings / ST 380/355 BBK / ST SR34 pads / Apex Arc-8 / Nitto NT01 / Cantrell Motorsports roll cage / Recaro Profi / Schroth Profi II-6 / BMW Performance Alcantera wheel / Aim Solo DL