Since I had the car in aug2016 brand new when I give it gas the valves ping and peak extremely bad not matter what fuel I use also the ac keeps loosing power it will blow fine then it almost goes off while still driving the same speed. Also sometimes when this happens I have a miss or hesitation in the engine. There has also been a pop noise in the back end when I stop or slow down since I have had the vehicle. I have taken my car 6 times to the local dealer in chas wv where I purchased the car and they keep saying they can't dignose the problem they have to contact Kia and never have an answer wheh I take the car back or contact them.

- Charleston, WV, USA

The contact owns a 2016 Kia Optima. The contact stated that the vehicle had a few seconds delay in acceleration. The contact took the vehicle to a dealer where it was diagnosed that there was a sensor delay. The manufacturer was not notified of the issue. The failure mileage was 200.

- Spartenburg, SC, USA

The contact owns a 2016 Kia Optima. While driving various speeds, the vehicle accelerated independently and the engine rpms drastically increased to 6 or 7. the contact also stated that the check engine warning indicator illuminated and there was a burning odor coming from the engine. In addition, the vehicle was leaking oil. The vehicle was taken to the dealer where it was diagnosed that the cvt valve needed to be replaced. The dealer stated that the vehicle was number 75 on the waiting list for the repairs and provided a loaner vehicle. Two days later, the contact was informed by the dealer that they performed an interim repair and that the vehicle could be driven. The dealer ordered the part for a permanent repair. The contact felt unsafe driving the vehicle. The manufacturer was not notified of the failure. The failure mileage was 1,000.

- Pewaukee, WI, USA