If you could find a brand new wheel that has never had a tyre mounted nor ever been put on an axle but was out of the 0.3mm tolerance it would probably go far in disputing BMW's contention that the issue is related to impact. Further, if you then could take those specimens to a metalurgical lab and have them x-rayed or otherwise examined internally and could discern flaws, BMW's case should crack just as surely as have the wheels. It would only take a single rim.
2009 E90 335i Montego Blue · Black Leather · Burl Walnut · 6MT · US Spec
SatNav • ZPP • ZCW • 6FL • TPMS • iDrive • PDC • HWS • Xenons • BMW Assist • Power Rear Sunshade • Logic 7
European Taillights • Rear Foglamp • OEM Alarm • PicoTray • DataToys XM-DVR • Multi-view Processor
Quaife ATB LSD • Short Shift Knob • Hartge Anti-Roll Bars • AP Racing Front Brakes • 19" Style 269