One problem related to transmission slip out of gear has been reported for the 2011 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Sonata based on all problems reported for the 2011 Sonata.
The car slips out of gear with changing the shifter from park to reverse. The selector will be in reverse and as the car is moving it slips out and goes neutral.