Defect
On a small number of vehicles, the high-voltage battery may not have been manufactured properly. As a result, the high-voltage battery cell modules could fail and cause the high-voltage system to shut down. If this happens, there could be a loss of power to the wheels and/or the high-voltage battery could overheat.
Safety Risk
A loss of power to the wheels could increase the risk of a crash. A battery that overheats can create a fire risk, even while the vehicle is parked and turned off.
Remedy
BMW will notify owners by mail and advise you to take your vehicle to a dealership to replace the affected high-voltage battery cell modules.