One problem related to engine shut off without warning has been reported for the 2010 Subaru Legacy. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Subaru Legacy based on all problems reported for the 2010 Legacy.
Car shuts off while breaking. Used to happen when stopped but now happens a few times a day when just trying to break. It almost caused an accident a few times. The car shuts off while in drive, lights flash on the dash, I have to put in park and turn the key off. It starts up fine, but happens again and again. It's been going on for about half a year and is getting worse. No one can seem to find any fail codes or anything.