My friend had this problem in hi e9x m3 with 6mt. Its been said that these e9x m3's are nowhere near as stout to take the abuse as the e46's. Upon taking the car to Sam@Autotalent, he said this has happened to a few of his clients already. The bolt has to be ordered from Germany and the bracket could also get easily damaged. In my friend's car, he has repeated launches, and upon many many WOT runs, shifted hard and fast. The weight transfer made the bolt go out. Sam also said his subframe was slightly tweaked. This problem is happening to mostly 6mt owners apparently. A clunk noise could be heard, and the dealer will not back up the damage because of repetitive launches or mods. It is easier to take it to an independent service shop.
Jet Black / Gloss Black Grilles / 8000k D1S low beam / 6000k HID fogs / GP Thunder 8500k angels & cornering bulbs / black reflectors / gloss black vinyled window trim / tints / smoked rear turn signals / black roundels / AC Schnitzer roof spoiler / VRS style decklid spoiler / Matte black Stripes / Rear fogs / matte mirrors / 19" LM reps / APR lip