2013 Hyundai Elantra cruise control problems

Was about 2 tenths of a mile from a stop sign. As I was beginning to make my approach, the car accelerated, lurched forward and sped across a four lane highway before I could react. The car was t-boned on the passengers side. The impact straightened my vehicles trajectory from 90 degrees to about 30 to 45 degrees. I then impacted a guardrail with a somewhat nearly head-on angle. After I went through the guardrail I then impacted a tree head-on which brought the vehicle to a stop.

Tl* the contact owns a 2013 hyundai elantra. While exiting the highway and decelerating from approximately 60-35 MPH, the vehicle suddenly decelerated to 15 MPH on its own. The vehicle was towed to shaffer hyundai where it was diagnosed that the throttle bar failed and the engine needed to be replaced. The vehicle was repaired. The contact stated that the vehicle was emitting an odor of burning oil. While driving approximately 55 MPH, the vehicle suddenly stalled and the oil and battery indicators illuminated.