I asked my dealer about the recall regarding my 2011 M3 and he had no idea about the recall at all...
The funny thing is I just started getting 'low battery charge' warning lights a couple of weeks ago. The car starts and runs perfectly, so in the interest of not wanting to take the car in twice, I am waiting for a response from my dealer. I too would be surprised if the M3 had a different battery cable than the regular 3 series, but I'll wait for official word on the recall.
2011 e92 m3 space grey, dct, tech, prem, etc
2012 x3 m sport, carbon black, prem, tech, conv, etc
specialized carbon stumpjumper s works fsr
ibis mojo sl, xtr, trek madone 5.2
nikon d750 (2), 14-24, 24-70, 80-400vr, 500vr, 16mm fish, 28-300vr