One problem related to battery 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.
The vehicle looses power while driving on the road and all the electronics shut down. I lost power steering and power brakes and could not stop the vehicle. The vehicle has an electrical problem that the service technicians can not see on the computer or figure out. First the service tech said it was a fuse not plugged in all the way then they say it was the battery. . I fear for my life in this car and will never drive it again. If I were in a cross walk I would have hit a pedestrian or I could have hit another vehicle. Luckily I was not on a high speed road or going through a toll booth or there would have been serious injuries. I cannot believe that the manufacturer feels I should drive this car. They told me it was ok before and I ended up having an accident. This car has an electronic defect. They do not put any value on lives.