One problem related to engine stall has been reported for the 2013 BMW 335. The most recently reported issues are listed below.
Auto start stop failure on automatic trans vehicle. Second time the engine has stalled and dropped into neutral in traffic while the auto start stop feature is active. Rather than starting back up as normal the engine throws an error code and forces the driver to manually turn the car off and back on again. Both incidents were at a stop light turning red to green.