My vehicle is randomly displaying 'goodbye' on the dashboard and is shutting off while driving. This started from nowhere with no warning lights or warning signals. I've only had this vehicle for 6 months and it has less that 30,000 miles on it. There are no open recalls on the vehicle, however I'll read about similar issue with the same make and model. I maintain my vehicle according to how Kia suggests. This is extremely dangerous as I am sometimes heading to work, going about 65 miles or more or the highway and the car just stops. It is now beginning to shut off immediately after cranking, and a noise is coming from under the hood, which sounds like metal in the engine. I have refrained from driving the vehicle completely, due to fear or loss of life. The sudden stopping of the vehicle has happened while I was driving on the city streets going about 30-40 mph, as well as on the highway going about 65 mph.

- Memphis, TN, USA

Vehicle suddenly stopped while traveling on highway from Mississippi to Pennsylvania, when vehicle stopped there was not any oil in the car. My son had it towed to nearest walmart, purchased 3 quarts, and continued. Four hours down the road vehicle stopped while I was driving.hei was close to birmingham around 11 at night. He stayed on the side of the highway until morning called a tow truck and took to riverside Kia where an engine analysis was done. He told my son the is owner negligience. He told him according the miles on the vehicle he should have had at least 9 oil changes, but there where only 3 receipts in the car. Prior to this incidence his vehicle had been broken into. He was able to locate other receipts. He had the oil changed 3 weeks before this (Oct 29, 2016)

- Clairton, PA, USA

I have a 2015 Kia Optima with 24,300 miles I purchase my car brand new from southwest Kia. I took my car in for service because I had just recently had oil change at walmart 700 miles later my oil light started appearing. I took it to Kia because recently having oil change and car was no longer registering oil. Kia went on to tell very little oil was in my car I informed them that I had just had oil changed 700 miles ago. So from there dealership did oil change. I was back at the dealership week later with same issue. Service stated that he found sludge and I stated that I have held up my end of the deal with oil changes as well as I provided my receipt or oil changes. Dealership is not willing to hold up there 100,000 power train warranty stating that I was not getting oil changed in a timely manner which is bs. I have been researching and I found other 2015 Kia Optima owner were having the same issue as I am having with car excessive oil usage, oil sludge and engine problems as I am. I have been in contact with Kia consumer dept for help. I have also been in contact with channel 11 and channel 4 consumer justice dept. I have attached copies of other owners with the same issue. You we work hard to pay for and to have a reliable transportation for the dealership not to hold up there end of the deal. I believe that Kia is aware of these issues and neglecting to help the buyers who have purchase these cars. It's strange that I found ten other 2015 Kia Optima owners with exact same issue. 2014 models have already had a recall I think 2015 model should be included to the recall. I have attached other Kia owners complaints and issues with this model car.

- Dallas, TX, USA

The engine began making a knocking noise, then stalled. Upon inspection at auto shop it was discovered that the engine seized and was a complete fail. The vehicle was traveling on a highway at around 65 miles per hour. The car has had all preventative maintenance performed and I can provide documentation as to that

- Maricopa, AZ, USA

While driving the vehicle, the power cut off, - coasted to a complete stop. Engine does not turn over. Lights/radio etc all work, so not a battery issue. There is a recall for previous model years of this same vehicle specific to engine failture.

- Los Lunas, NM, USA

Engine seized up at 35K miles. Kia did not honor the warranty and said it was due to my personal maintenance of the vehicle. Basically told me that if I had taken my car to Kia everytime for an oil change it would have been covered. Service manager told me just to wait until another recall comes out and I would get my 6000 dollars back

- Suwanee, GA, USA

Car appeared to stall while on highway. Safely pulled over and was able to restart. Local shop said they could not find anything wrong. Next day a very loud kocking started, took it to the dealership who informed me of the engine recall. While my year was not in the recall they would be replacing the engine once I provide receipts showing my oil changes done outside of their location.

- Mesa, AZ, USA

Keep hearing a loud rattling noise from the left side of the engine. He is more so when the car is in park and early morning. Has gone to the shop twice for this issues and each time have been told they can not find the problem even provided a recording of the sound. Also the radio complete shuts off by itself has done this 3 times now. Once again have taking it to the dealer and nothing was done about because the problem would not duplicate it's self. The passenger window gets stuck and have to play with the knobs in order to get it to come back up. I got this car July 21. 2017. The car has been in the show twice. First time for a week. Second time 6 days. Still no solution. Was told by lemon law to take it back and have them service it again. Has to be seen by dearer service department four times for the same problem before they will help.

- Seaside, CA, USA

Your sitting at a red light or driving down the road, and the car just stalls/turns off without any warning what so ever. This actually just started today. After looking it up, it seems to be happening quite a bit & nothing is being done by Kia. This is ridiculous, not to mention scary! it's an accident waiting to happen!

- Farmersville, OH, USA

My vehicle starting driving sluggish and making an increasingly knocking noise from under the hood. I took the car for a routine oil change and 2 weeks later checked in a normal ride to work I realized my vehicle was smoking really bad from the exhaust and a horrible smell of burnt oil filled the interior. I took the car home and parked it. Less then a week later I get a recall letter for the engine. I had the car towed in to Kia they ran a test my engine has blown they put me in a rental for 16 days this began 6/20/17. I came to get my car on 7/8/17 and didn't even get down the street before getting pulled over and notified that my car is roaring smoke the exhaust again. I immediately brought it back. They drove it with me and also agreed it was still smoking and had nothing to do with old oil burning off and now my a.C. is acting weird. They placed me back in a rental and told me they would open a ticket. To be very honest I'm trying to keep present but I'm very very scared and concerned about getting back in the car. I feel trapped and I'm still making payments on something I can't even drive and feel unsafe in.

- Fontana, CA, USA

Takata recall. As I was driving on the highway, my car stopped on me during traffic flow. This has happened more than five times and I was almost killed with my small children in the vehicle. We have been suffering with this issue for over a whole year. On July 3,2017 my mother and I was coming home on the fwy and once again, during traffic flow, my car shut off while driving on the road. Luckily, I was able to pull over to get a safe spot before I crashed because there were so many cars coming behind me so fast and the side ramps we're very narrow. I have taken it in for servicing but for some reason, they are not able to find out what the problem is. I have taking it in and even left with them for almost a whole month at one time and still no diagnosis. Rental car after rental car. They installed a data recorder in my car and the first time they found no data, then they installed it again for another week and they claim that it was the fuel pump relay. So they installed a new fuel pump relay in my car. A few weeks later my car shut down again on the way coming home and in the freeway with my mother and 2 year neice. We we're almost killed. The car just shuts off while driving and says "goodbye" with no warning while driving this is how I know that this has something to do with the engine. Please help if you can. I do not feel safe in this car and we are in danger. Sometimes the lights in the car cut on and off too.

- Fontana, CA, USA

Engine stalls when slowing down to turn or continue. This is a continuous problem sense 2015

- Winchester, CA, USA

My car started smoking one day while I was driving down the road going about 25-30mph it was so bad people started yelling!!! get out.. get out..your car on fire..I pulled over so embarrassed.... and I got out...the smoke had the back of the.car black...from the smoke out of the tailpipe.so I waited 30-45 had car towed back home...I stay 35 mins from Kia dealership so I had to wait until next day to take over there. And surprisely they told me sludge oil.at this point it was only 32,000 miles. I asked how can I fix the problem they said..they dont fix sludge oil... and made it very clear they was voiding my warranty because I didn't have all my receipts from previous oil changes. And this come from lack of maintenance... ok. So I got oil changes every 2,000 problem slowed down.. no sensors was on or nothing.... one day went to store came home and parked never cranked...55K miles towed to St.augustine Kia dealership said the engine is shocked...it didn't have any noise coming from anywhere.. we thought it was a dead battery or starter..Kia said engine I just don't understand..

- Palatka, FL, USA

The Optima has stalled multiple times while driving on both the highway and city streets. When the car stalls everything shuts off completely and it's is extremely difficult to steer. My 2 year old daughter has been in the car during rush hour traffic a couple times while this has happened. I have called both Kia corporate and the Kia dealership where the was purchased and they can't figure out why the car is stalling. After 3-5 weeks of going back and forth with the Kia corporate and the dealership they have finally told me there is nothing they can do.

- Strongsville, OH, USA

Engine locked up durring acceleration to 40 mph why merging into traffic found out engine has a bent rod. Oil and coolent where sufficint but Kia will not fix or replace. Could of caused my wife to crash or be hit by traffic

- Serapta, LA, USA

Engine light came on, then the oil light. I stopped to check oil. There was no oil on the dipstick. I checked for leaks. Found none. I added 2 quarts. The engine was knocking. I took it to the dealership. My car was under warranty. But wouldn't replace it. It would cost me $7200. So I tried to drive it home, and it quit.the engine shut down. I had to have it towed home. This was in November 2016. And it is still down. Then I heard Kia is getting a class action lawsuit against them, for oil flow issues. I'm still paying on the car. I financed through my credit union. So they already got there money. I think that is why they are screwing me over. To be clear I had just left the dealership when it quit. It never made a sound, the dealership had it 3 days.

- Conway, AR, USA

After fueling the vehicle up, and started to head down a busy roadway the engine of my vehicle seized up and would not start again. The only reason both the dealership and manufacturer are giving me its because of the lack of maintenance but the car was bought in to the dealership service department on December 16 2016, and I was told that everything was functioning. This same problem is currently going on with the 2011-2014 version of this vehicle but the company refuses to acknowledge that the later version my have this dangerous issue.

- Tacoma, WA, USA

The contact owns a 2015 Kia Optima. The contact stated that the vehicle shook whenever the engine was running and a loud rattling noise was heard underneath the hood. The contact took the vehicle to a certified mechanic who diagnosed that the fourth piston failed and needed to be replaced. The contact then took the vehicle to the dealer where it was determined that the sludge in the oil pan caused sludge to enter the engine. The vehicle did not receive an official diagnosis. The vehicle was not repaired. The manufacturer was informed of the failure and stated that the repair was not covered under the warranty due to the sludge in the engine. The approximate failure mileage was 41,000.

- Houston, TX, USA

The contact owns a 2015 Kia Optima. While driving approximately 40 mph, a rattling noise was present coming from the engine and the vehicle stalled. The vehicle was towed to a dealer where it was diagnosed that the engine seized and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 30,000.

- Whittier, CA, USA

The vehicle started idling roughly and the check engine light came on. Stopped at the nearest automobile center, they inspected the vehicle and indicated that there maybe a defect to the engine and that my engine may need to be replaced.

- Long Beach, CA, USA