Very good thread imo. My suggestion in addition to the ones you already mentioned: Charge pipe popping/cracking which is a repeated issue.
A comment on car theft vulnerability: there are some reports that this might be more of a rhd markets poroblem due to the fact that blind spot in alarm system affects rhd cars. Of course, the real OBD issue remains the same for both rhd and lhd cars.
"The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris.
2011 BMW 1M: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, P3Cars, OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.