The contact owns a 2015 Kia Optima. The contact stated that while driving at 65 mph, the engine stalled while the check engine warning light illuminated. The vehicle was towed to a dealer where it was diagnosed that the engine failed and needed to be replaced. The vehicle was not repaired. The manufacturer notified of the failure. The failure mileage was approximately 67,000.

- Temple, GA, USA

The contact owns a 2015 Kia Optima. The contact stated that the vehicle stalled while driving. The vehicle was taken to the dealer where it was diagnosed that the engine malfunctioned and needed to be replaced. The failure recurred without warning. The vehicle was towed to the dealer where it was diagnosed that the vehicle experienced engine failure due to maintenance related issues and the engine needed to be replaced. The manufacturer was notified of the failure. The failure mileage was approximately 58,000. The VIN was not provided.

- Ripley, MS, USA

Engine failure with my new 2015 Kia Optima at 42,000 miles. Kia denied warranty coverage due to not being able to prove all oil changes. Kia also denied knowing there was an engine defect on this 2.4L gdi engine. Today I see an engine recall finally from Kia, however they stopped premature at the 2014 model. I had to pay for a new engine to be installed out of my own pocket on a brand new vehicle.

- Auburn, ME, USA

I have two Kia, one 2013kia soul, and Kia Optima 2015, first the Kia soul won't start, looks like no battery at all, dealer say it was a bad battery, but the problem start again, just this time loose all power when running, they towing back to the dealer this time, they say this time was crank piston sensor, no cost at this time, this happen on 08/01/2016, now the Kia Optima, same, I drive all morning, the day was hot, and I stop at the storefor water, don't take more then 5min. When I get back to my car, cars unlock the door, but have no power at all, I check the battery with a fluke multimeter, reads 12 volts when I disconnect the negative post, and 6 volts when I connected back to the battery, then my friend stop by, and jumpstart my car, same thing, I disconnect the negative post and I take chassis ground for the jumpstart, same thing, then I took of the battery from a Chevy 2002 Silverado, my friends truck, and I connected direct to my car, same thing, I ended to call road side assistance for Kia motor, to take it to the Kia dealer, the towing truck driver say, they pickup a lot of Kia's cars for the same reason, this time happen on 04/05/2017, I did claim to Kia motor, they say was the battery, and I just think they want sale a 300 and something battery, and a have to buy a new battery every two years, with the new Kia and Hyundai recalls I think they should recall this two cars!!

- Compton, CA, USA

While driving on a busy interstate highway, suddenly a battery warning light flashed across my dashboard and my vehicle began losing power. I drifted to the right within speeding traffic trying to reach the shoulder of the road. I didn't make and my vehicle came to a complete stop and could not be restarted in the middle of an exit off ramp. Oncoming traffic was swerving and coming to abrupt stops to avoid slamming into the rear of my vehicle. I got out of the vehicle and stood on the side of the road, in fear of being killed inside the vehicle. A police officer put out flares and then state highway administration emergency tow, moved my vehicle to the shoulder of the road, out of the way of speeding traffic. The vehicle was then towed by Kia roadside assistance to the nearest Kia dealership. They have diagnosed my vehicle with "sludge" in the engine and burnt out starter, requiring a new engine and starter. I have provided all service records of oil changes conducted as required which were all provided by Kia. Car is brand new under warranty, two years old, with 18,561 miles and no history of warning lights. I was told it would be 2-3 business days for a decision. It's been 6 business days and I haven't received a loaner/replacement vehicle nor approval for the repair.

- Hanover, MD, USA

Vehicle cutoff while driving on the freeway the vehicle cut lost speed and cut off.

- Cerritos, CA, USA

20K miles- 2015 Kia Optima- white smoke coming out of tail pipe- vehicle cutting out /almost stalling when accelerating. No indicator light illuminated regarding oil or engine issue. Took to dealership- diagnosed with "sludge" and told need new engine -quote $6500-$8000 and was told my options were a.) fix it or B.) don't fix it- provided oil change receipt had on hand- have to dig & research to obtain past service- warranty claim denied- Kia- unwilling to assist- bad business-

- Las Vegas, NV, USA

2015 Kia Optima was out of oil @ 22,000 miles and no indicator light had gone on when it was taken to an oil change. The oil change place was the one that indicated that the vehicle had no oil in it. It started making some rattling noise specially goint uphill so I took it in to Kia service department. They diagnosed it with "sludge" in the engine and engine would have to be replaced. I had to prove 3 previous receipts of oil changes otherwise the warranty would not cover it. I do not have those receipts and 16 days later took it to the same place I did most recent oil change because oil light had turned on. The vehicle again had no oil in it. The topped it off but mentioned that it was not normal for such a recent model to be burning oil. Vehicle is still running but makes rattling noise once in a while, produces white smoke out of exhaust pipe and I have to put oil in it every couple of days. I cannot afford to buy a new engine. I am a single mom and needs a reliable vehicle to get to work.

- San Ysidro, CA, USA

The vehicle was in motion and had an oil change the previous day. The vehicle lost power and an audible clicking or tapping noise came on while driving on the highway. My wife had just enough time to pull off into a local business and parked the car. I took it to Kia and they advised there was "sludge" in the engine and we had not been maintain the vehicle properly. Offered to produce records but they advised they still would not cover it.

- Fate, TX, USA

The contact owns a 2015 Kia Optima. While the vehicle was undergoing an oil change, the vehicle stalled and the oil indicator illuminated. The vehicle was towed to a dealer where it was diagnosed that the engine failed and needed to be repaired. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was unknown.

- North Richland Hills, TX, USA

Driving home from the store last night and my car started sputtering and stalling, a cloud of white smoke came from my exhaust pipes. I parked it called my dad and he told me to check the oil. There was barely any oil on the dipstick even though I had just got my oil changed 10 days earlier. I had the company that changed my oil check it out. They told me it was something internally causing the oil to burn off therefore it was a manufacturers issue and it should be covered under warranty. I had it towed to the closest Kia dealership and waiting to hear what their diagnosis is. My car only has 55,000 miles on it, I have only had it a little over a year and I bought it brand new.

- Shawnee Hills, OH, USA

Engine failure at 15 months old and 42,000 miles. Kia denied warranty coverage because I could not prove oil changes. Same complaint as thousands of other Kia vehicles, happened abruptly, car starting making loud rattling noise on acceleration while driving, no warning, sludge in engine. I had to pay out of pocket for a new engine to be installed with no assistance from Kia or my local dealership.

- Auburn, ME, USA

My 2015 Kia Optima has 23000 miles.. I couldn't remember when I had the oil changed, but I was driving on 75 coming from fla. The ac stop working and then shortly after that the car started to slow down. It finally came to a complete stop, when I got it to the Kia dealership they informed me that the engine had seized.because the said I could not prove that the oil had been changed, the warranty would not cover it. I bought the car brand new. Only had it 15 months. There was no warning lights or any signs of trouble.Kia will not fix it, they want almost 8.000 to put in a new engine.

- Riverdale, GA, USA

As I was driving my 2015 Optima to the store my check engine light came on. The next day I started my car and heard a rattling or ticking sound, this was on labor day, so I turned my car off and called the dealership. Due to holiday the service dept was not open. I called them again on Tuesday Sept 6th and was advised they would have it towed. I received a phone call on Tuesday evening stating my motor has sludge and needs to be replaced.

- Villa Rica, GA, USA

2015 Kia Optima, only 47K miles....engine failure...the dealership says its sludge... and I have to provide all my maintenance records. It started with white smoke coming out of the tailpipe and loud rattling noise when I accelerated, then this past Saturday, it started to shake violently and the check engine light went on. I had to get it towed. This is Kia's fault!!! not mine. I've done the same routine maintenance on my Toyota and Honda which had over 100K miles with no problems! I am being told by Kia that it won't be covered under the warranty.

- Corona, CA, USA

My 2015 Kia Optima has 26,456 miles. The last oil change was performed at 26,064 miles. On 6/4/16 while driving approx. 50mph in 3 lane traffic the engine seized up, car shut down and interior filled with smoke. Had vehicle towed to Kia. Was told it needs a new engine due to sludge in the oil. Kia is refusing to honor the warranty because I cannot produce receipts for previous oil changes. I have researched and many other Kia vehicles are having very similar problems with low miles! there has to be something wrong that Kia is not aware of or is just not willing to admit. Not only will they not fix my vehicle but I fear someone is going to get hurt or even killed. I informed Kia of my concern but they did not seem to care.

- San Antonio, TX, USA

The contact owns a 2015 Kia Optima. While driving 60 mph, smoke emitted from the engine compartment without warning. The vehicle was taken to the dealer. The technician diagnosed that the number two cylinder was defective and needed to be replaced. The vehicle was not repaired. The failure mileage was 58,000.

- George Town, SC, USA

I purchased my car in the greater san diego area back in June 31. 2015. Have approximately 8K miles on my vehicle and notice around 3K my car would jerk when coming to a complete stop. This has happened a few times approximately 3-4 time (average once a month).and today 10-27-2015, my car once again jerk but this time the engine made a unfamiliar sound. I will be taking it to the dealership as soon as possible.my car has received all schedule maintenance; per owner manuel. It has passed all Kia certifed dealer/mechanic inspection when taken in. Also, when the contact to purchase was signed it did not get a full inspection as the dealership was closing and the appropriate staff for inspection had left for the day. Notice when I got home the front passenger signal light did not work. Called the dealership to get my new car fixed and had to wait for approximately 3-5 days for the repair, at that point it also passed thier inspection.

- Chula Vista, CA, USA

The contact owns a 2015 Kia Optima. The contact stated that while driving 25 mph, the vehicle made an abnormal noise without warning. The contact mentioned that the noise was emitting from the engine. The failure recurred several times. The vehicle was taken to the dealer. The technician was unable to diagnosed or repair the vehicle. The manufacturer was notified of the failure. The failure mileage was 10,000.

- Milford, PA, USA