BMW is recalling 2,500 MY 2008-2009 M3 passenger vehicles with an optional double clutch transmission. The problem involves the double clutch gearbox. In a situation of rapid vehicle deceleration, the transmission software may perform a multistage downshift.
Dealers will reprogram the engine and transmission electronic control unit with updated software free of charge. The recall began on December 3, 2008. Owners may contact BMW at 1-800-831-1117.