There have been multiple reports of abnormal shaking and noise with the 2014 Hyundai. A YouTube video discusses the problem.
Here are some typical complaints,
While driving on 5 Freeway in California my 2014 Hyundai Elantra started to violently shake like someone hitting the brake and then the car just shut down. I threw it in neutral and help my wife turn the steering wheel because we lost power steering. We got lucky and had a space to coast to the side of the road.
FREE CONSULTATION ON YOUR PROBLEM WITH THE 2014 HYUNDAI SHAKE AND NOISE