One problem related to engine stall has been reported for the 2012 BMW 328. The most recently reported issues are listed below.
I was driving normally when a light came on saying drivetrain malfunction. The engine started to stall I pulled over on the side of the road and the car just turned off and never turned back on. Had a mechanic check and told me that the engine seized/locked up on me. I have serviced my vehicle at the BMW dealer & have all the receipts. I bought this car used one year and five months ago & I have properly maintained it.