As others have said, the car comes with the a BMW fix a flat kit. I've never like those so I carry a plug kit and a pump...
This:
Fact is I carry this in all my vehicles and a pump. I've had a few flats over the years and it's saved my butt. I plug it on the spot then forget about it.
BTW, I've blown out one plug years ago doing a burnout... I put a plug back it and stopped doing burnout on those tires. LOL... Ok.. I later replaced the plug with a plug patch then went back to doing burnouts.