One problem related to transmission gear slipping has been reported for the 2012 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Hyundai Sonata based on all problems reported for the 2012 Sonata.
While on the highway the vehicle began decelerating and increasing in rpms to maintain speed. �transmission began slipping in and out of gear. From a stop it would take a few seconds before the vehicle engaged gear forward. �smell of burning fluid came from the Sonata. �this was a third and final incident with the power train. Previous incidents involved hard shifts that threw passengers back into their seats and sluggish response merging on freeway.