One problem related to engine failure has been reported for the 2013 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Ford Focus based on all problems reported for the 2013 Focus.
Shifting into neutral (while decelerating/braking) will intermittently cause engine rpms to rapidly drop, resulting in engine failure/stall. Attempts to restart the engine are typically successful, although occasionally requiring multiple attempts, due to engine re-stalling. Key factors seem to be engine oil temperature, and braking/decelerating.