One problem related to engine stall has been reported for the 2015 Kia Motor RIO. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Kia Motor RIO based on all problems reported for the 2015 RIO.
The engine periodically will stall for 2-3 seconds, usually when starting a left turn from a stop. This can prove hazardous in a busy intersection. This has been going on since I bought the car 12 October 2015. The dealer stated the "hesitation" was a normal function of the engine computer's "acclimation" to the driver. It hasn't adjusted to me, and I'm afraid to let my wife or daughter drive the car.