One problem related to battery cable has been reported for the 2011 BMW 328. The most recently reported issues are listed below.
Car would not start, did not respond to charging via jumper cables earlier that day. It started when connected to the charger by the tow truck operater. I was told to drive for 30-45 min by the BMW service center and the tow driver. While driving on a city street about 35 min later everything stopped, lights, electrical and engine. I was stranded in the middle of the road. I called police to help with traffic control as well as insurance for roadside assistance. Could not move the vehicle due to it was locked in place. And no hazard lights either. Had to call another tow truck. BMW service states it is the battery cable and will cost $3000. 00 to fix.