NHTSA Complaint #11540631 — 2016 HYUNDAI SONATA

The contact owns a 2016 Hyundai Sonata. The contact stated while driving 45 MPH uphill, the vehicle decelerated unintendedly to approximately 35 MPH and gradually accelerated as needed. There was no warning light illuminated. The contact stated that the failure recurred while driving on another occasion. The check engine warning light illuminated. Additionally, the contact stated that on the third occurrence, the vehicle lost motive power and shutoff after pulling into a parking lot. The check engine warning light, the battery warning light, and the low oil pressure warning light were illuminated. The vehicle was towed to an independent mechanic, where it was diagnosed that the engine had seized and needed to be replaced. The vehicle was not repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 127,000.