One problem related to engine shut off without warning has been reported for the 2010 Mini Cooper S. The most recently reported issues are listed below.
My car shut down when I was driving out of a highway on a ramp. It stopped on the ramp. I noticed this because when I stepped on the gas my car didn't speed up but slowed down. I tried to restart it multiple times but it didn't work. Finally it was tolled to an mechanical shop and they told me the engine was broken.