On 12/2/2010, I was driving at highway speed (approximately 60 mph) and the car violently jolted, as if I had run over a large object. If I had not had both hands on the steering wheel, I might have lost control of the vehicle. Subsequently, I was able to drive the vehicle, but it seemed to be over-revving, as if it was stuck in the wrong gear. I returned the vehicle to the dealership that night. After reading the computer error code, the service manager indicated that they would have to replace the transmission. I was provided with a loaner vehicle. On 12/8/10, I received a call from the service manager. He stated that in these circumstance, the transmission is typically replaced with a rebuilt transmission with a new housing. He indicated that the dealership was trying to obtain a new transmission for me. They were experiencing difficulty because there was 80 some requests for new transmissions and only 70 some available (county", state?, central Florida") updated 01/20/11

- New Smyrna Beach, FL, USA

El Hyundai Sonata 2011 cuando ES K lo van a recojer ?tengo uno con el problema de la direccion, ya lo lleve al dealer supuestamente lo arreglaron Y ahora esta peor Y ellos no me dan informacion de cuando lo sacan de circulacion dicen no estan enterados de nada, por favor ayudenme, condusco con 3 ninas, gracias.

- Miami, FL, USA

The contact owns a 2011 Hyundai Sonata. The contact stated while he stopped on an incline, he shut the vehicle off while it was shifted into drive and removed the key from the ignition. Once he exited the vehicle, it began to roll forward independently. The contact re-entered the vehicle and was able to shift into park to stop the vehicle from rolling away. An authorized dealer was notified and he was informed the vehicle was functioning as normal. The vehicle was not repaired and the failure continued to recur intermittently. The failure mileage was 1,500 and the current mileage was 5,200.

- Tucson, AZ, USA

Over the past 3 days I have been unable to depress the brake pedal and start my car with the electronic starting system. The problem is intermittent and the time frame varied from 2 minutes to 15 minutes before the car would start.I called my dealer to make a service appointment ant the service department commented they never heard of this before but I see other complaints online. Besides the danger of being stuck somewhere I am concerned that the braked may not work for stopping or a fire if it is electrical.

- South Setauket, NY, USA