Cruise Control problems of the 2016 Kia Motor Optima

The driver door lock does not work. It is the only door that will not lock sometimes. Other times it is the only door that will not unlock. The cruise control does not always want to work. It will say cruise but will not let me set it.

Letter from congressman earl l buddy carter on behalf of constituent, regarding issues with a kia purchased in savannah, georgia. The consumer stated the vehicle has experienced various issues including the battery being replaced 5 times in 8 months, multiple engine issues, electrical issues and a lack of acceleration. The consumer also stated, while driving with the cruise control activated, the vehicle would speed up to catch up to the designated speed and come in to close contact with the vehicle ahead. The failure is intermittent.

2016 kia Optima. Consumer writes with concerns malfunctions with advanced Smart cruise control.

When the car encounters a hill and needs to downshift, either to climb or to hold back the speed when it descends, the cruise control remembers the downshift and will not return to high gear until a) it is manually overridden, but will still downshift up to 2 gears, when the lever is placed back to automatic or, b) when the cruise control is turned off. The cruise control also belatedly reacts to loss of speed control and overcorrects with too much power, resulting in a crude ride, as well. The workload is increased dealing with getting the car to attain top gear on flat roads, and is creating unsafe conditions, in my opinion. I have attempted to get this attended to at the dealership, and they continue to not fix the issue, as well as inform me I shouldn't be using cruise control on hills. My 2014 kia Optima did not exhibit these issues, nor any other of my cars which had cruise control. There is a problem and these people will not fix it.

I have been experiencing issues with my 2016 kia Optima since I purchased it on September, 5th 2016. A short time after owning my new vehicle, first the car started to hesitate when starting as if it was struggling to start, the push button would turn red and the indicator lights would light up on the dashboard as if the key was not recognized in the car. The car would also self accelerate. On or around August 16th or 17th the car stalled out while it was being driven,we attempted to restart the car and it turned on like normal so the tow was canceled. , the service writer & kia all have copies of the videos the mechanic has also told me he was able to duplicate the issue, the solution was to change the fuel pump and service the fuel delivery system. Upon the services being completed we were contacted by the service manager, and kia that the car was ready to be picked up on September 6th 2017. While driving the vehicle home we noticed some hesitation while idle, also some strong acceleration when taking off from red-light or stop sign. While parked we noticed some strong vibration from the motor which the car had not had previously before service. Also after several attempts of starting the car, the car would either start rough, and also still had the same original occurrence as before with the key not being recognized in the car. With the car not fully starting and the push button turning red with the instrument panel lighting up with the key not in car light along with some others. On Thursday September 7th, 2017 at about 4:30pm I had the cruise control set to 80 mph, the car hesitated a couple times, then self decelerated to 73 mph, reaccelerated to 82 mph then self adjusted to 80 mph, I contacted the dealership right after the occurrence I was told I had to wait to bring the car back in they had no loaner vehicles, not to use the cruise control feature.