One problem related to transmission not go into gear 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 sitting still at stop light on a city street with foot on the brake pedal and in drive- the car lurched slightly like it was trying to go forward. The brakes stopped it from moving. It felt a bit like the car shifted to a another gear. The whole event lasted about 2 seconds. Otherwise the car behaved normally. This has happened three to four times since we bought the car new in Dec. 2011. A disturbing event. We would like to know if others have encountered this, and is it dangerous?.