FWIW, the arm was intact. It was just the rubber piece that was hanging off. Anyway, the matter is handled. Thanks to all who contributed.
2011 X5 SAV tit silver sold (strategic maneuvers for E90 M3!)
2013 Subaru Impreza graphite gray/black replaced the 335
RIP 335i xdrive DSB/gray
worst decision ever
2013 Honda Pilot (functional $hitbox to save for M3)