10.0

really awful
Crashes / Fires:
8 / 38
Injuries / Deaths:
7 / 0
Average Mileage:
48,684 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2015 Kia Optima engine problems

engine problem

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2015 Kia Optima Owner Comments (Page 9 of 26)

« Read the previous 20 complaints

problem #348

Sep 302022

Optima

  • 95,000 miles

A D V E R T I S E M E N T S

The contact owns a 2015 Kia Optima. The contact stated that while his wife was driving at an undisclosed speed, the engine seized with knocking sounds coming from the vehicle. The contact-??s wife pulled over, and the contact arrived on the scene to inspect the vehicle and check the engine oil. The contact restarted the vehicle and the failure recurred with knocking sounds coming from the vehicle. The vehicle was towed to the dealer where it was diagnosed that the main bearing had fractured and the engine needed to be replaced; however, the manufacturer declined the engine replacement due to an unrepaired Knock Sensor Detection System (KSDS) recall. The contact had not yet received the recall notification. The vehicle was not repaired; however, the dealer offered to buy back the vehicle from the contact. The manufacturer was made aware of the failure and declined the engine replacement. The failure mileage was approximately 95,000.

- Conroe, TX, USA

problem #347

Oct 172022

Optima

  • miles
As I was driving on the Interstate, my car lost power and I was unable to push on my gas or use my brakes to slow down to pull off the interstate. Lights begin flashing with a warning that read -?? Check Hybrid system. Stop vehicle and turn off engine. This is the second time this has happened but before my car shut off and didn-??t turn back on. I was going to be hit by a semi truck had he not swerved around. Also, this the 5th time this week it has happened.

- Jacksonville, FL, USA

problem #346

Aug 072022

Optima

  • miles
May 28,2022 car stalled no warning, car towed to service center found out engine trouble, claim denied by warranty because it was related to a Kia recall, Knock Sensor Detection System, car was towed to Kia Dealership on June 7,2022, where it was confirmed that engine seized do to the recall, had engine replaced and car returned July 9,2022, on July 10,2922 returned car to dealership for engine knocking noise, car repaired tensioner pulley and alternator m, picked car up July15,2022. On August 7,2022 car stalled while driving and smoke coming out of hood, engine was on fire and engulfed entire vehicle.

- Temecula, CA, USA

problem #345

Oct 012022

Optima

  • miles

A D V E R T I S E M E N T S

i was driving my 2015 kia optima lx 2.4L which i recently got i am currently the second owner and did not receive no mail containing any open recalls to my car and the engine seized up and now the Kia dealership does not want to help me out, what can i do?

- Murrieta , CA, USA

problem #344

Sep 242022

Optima 4-cyl

  • miles
I was driving down the freeway and my car engine shut off and lost all power. Pulled off to the side of the road and the car started back up and was running fine. About 10 miles later the engine started clicking and continued to get worse as I tried to get off the highway and into a Kia Dealership. When I was about a tenth of a mile away from a Kia Dealer, my engine made a loud bang noise, and started smoking immediately as my car completely shut down. I had cars behind, alongside, and in front of me that were put in obvious danger as my engine blew up and smoke filled the air around the area. Making visibility poor for others as well as my speed dropping without brake lights due to the engine failing. The problem cannot be reproduced as the engine will not start but the Kai Dealership the car is currently at stated that the engine needs to be completely rebuilt. Vehicle was inspected when I lived in North Carolina in 2018 and 2019, nothing was stated as a danger at that time. There were no warning lights when the vehicle first shut down. The check engine light did not come on until about 20 minutes after the engine started clicking.

- Morgantown, WV, USA

problem #343

Oct 022022

Optima

  • miles
My car started smoking while I was driving! From under hood and into vents in car bad! Got pulled over and some yelled my car was on fire, get out! There were no lights on for car! I had ran one of those diagnostic checks that morning ( have it set for once a month) Nothing came back on it at all, car seemed to be great! Left house and 15 mins later car caught fire in the engine! I could of died and my dog! Fire looks to have burned through the fire wall!

- Bella Vista , AR, USA

problem #342

Oct 042022

Optima

  • miles

A D V E R T I S E M E N T S

My Kia had been using oil at an abnormal rate. Could not identify anything wrong. The car would sometimes unexpectedly stall out and the oil would be a little low, even relatively soon after an oil change. I would top it off and it would operate fine. This month the engine seized up completely. When we had a mechanic disassemble the engine and examine it, he found abnormal damage to the engine, including carbon deposits from burned off oil that had escaped and not returned for lubrication, as well as metal shavings in the oil pan.

- Tulsa, OK, USA

problem #341

Sep 112022

Optima

  • miles
Driving one day and I hear a knocking sound coming from the engine. It locked on me on the way home and isn-??t drivable. Took it to the dealership and they said it had a recall and the engine needs to be replaced. Kia denied the engine replacement saying I took to long to come in. I bought it used and never received a letter in the mail about it.

- New Braunfels , TX, USA

problem #340

Oct 032022

Optima

  • miles
2015 Kia Optima began to not accelerate on freeway when trying to reach 2 rpms. Took for diagnostic it was stated solenoid needed replaced. However, the engine was knocking and I was informed that I needed a new engine. Mechanic did not want me to invest money into vehicle. I pulled up vehicle and see this as an issue for 2015 Kia Optimas. That current issues have been reported by numerous people. My car had no lights or warning sensors regarding these issues. Now the engine is inoperable and I have no vehicle w a car payment.

- Pataskala, OH, USA

problem #339

Sep 152022

Optima

  • 95,000 miles
The contact owns a 2015 Kia Optima. The contact stated while driving at 35 MPH, smoke was coming inside the vehicle. The contact had to stop the vehicle and turn off the vehicle, when the contact restarted the vehicle, he saw flames coming from the windshield wipers. While opening the hood of the vehicle to see where the flames were coming from, the contact burned his hands. Medical attention was not required. The vehicle burst into flames. The fire department was able to extinguish the fire. The vehicle was towed to a repair facility. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 95,000. The VIN was not available.

- Longwood, FL, USA

problem #338

Sep 152022

Optima

  • miles

A D V E R T I S E M E N T S

While driving on the freeway vehicle began to knock. Pulled off the freeway into a dealership. Dealer said there was little oil in the engine despite having an oil change less than 1000 miles prior. Engine burned through 5 quarts in less than 1000 miles. No oil lights or check engine lights on causing engine failure and need for a new engine. Told vin does not fall under the endings oil consumption recall of similar model/year.

- Huntington Beach, CA, USA

problem #337

Jul 312022

Optima

  • miles
2015 Kia Optima Hybrid HEV system. Months after purchasing the vehicle two different lights would come on the engine. One is the HEV warning light and the other is a flashing -??Turn off engine and check HEV system-??. The first time it happened the vehicle turned off. It was towed to Kia, 02/2020. They change some sensor and sent me on my way. 3 weeks later the HEV warning light came on again so it was towed to Kia for the 2nd time, 03/2020. This time they said they could not recreate the issue. A month later the light came on again and again but since the light never stayed on, I kept getting told by Kia that I-??d have to take it in when the light stayed on. 01/2021 the light came on again, with the flashing warning and the vehicle turned off, mid-drive. It was towed to a mechanic shop near me, where they replaced the wiring harness completely, but a month later the same light came on again. Over the course of the year, the warnings kept turning up and time and time I kept getting told they needed the light on at the dealer so they could determine with the codes, what is wrong. 07/2022, light came on as I was merging on to the freeway and the car shut off. I was able to make it turn on and make it home safe. The next day I towed it to the shop where they replaced the wiring harness and they stated they could not touch it further since the codes they got where -??High voltage battery-?? codes and a specific tech is the only one when could work on it. I took it to Kia where it stayed 33 days. They changed a part. Two days later the HEV light came on again, so I took it back. They kept it one day, drove it 60 miles and they could not recreate the issue. I got it back on Saturday, 5 miles out the light came back again and again. I took video. Called Kia and now the car is back at the dealer while they try and figure out the issue. I-??m scared for my life. The car gives no warning when it decides to shut off. Wheel locks on the times it does turn off. HEV system is no good.

- Azusa, CA, USA

problem #336

Aug 312022

Optima

  • miles
2015 Kia Optima. Consumer writes in regard to engine failure. The consumer stated they were never notified of any recalls. The manufacturer was notified, but had not offered any assistance.

- Lizella, GA, USA

problem #335

Feb 032022

Optima

  • miles
On January 12, 2022 I was informed by Danbury KIA (Danbury, CT) that my 2015 KIA Optima required a recall engine replacement. I left the vehicle with the dealer and the repair was completed on Jan 31, 2022. I picked up the car on February 1, 2022 and on February 3, 2022 the car was destroyed by an engine fire. My insurance company deemed the car a total loss and compensated me for the market value of the car. At the time the car was completely paid off and I was still in excellent condition. I had no reason to trade for a newer model - especially with the new engine. After the insurance payoff I still needed to finance $25000 for the purchase of a comparable replacement vehicle. To date neither the dealer nor the KIA corporation have contacted me or made any attempt to address my loss.

- Danbury, CT, USA

problem #334

Jul 212022

Optima

  • 99,000 miles
The contact owns a 2015 Kia Optima. The contact stated that while driving 20 MPH, an abnormal knocking noise was coming from the engine. The vehicle then lost motive power and stalled with the check engine warning light illuminated. The contact had the vehicle towed to an independent mechanic who diagnosed the vehicle with engine failure. The vehicle was then towed to a dealer where she was given an estimate for the repair. The manufacturer was notified of the failure and the contact was informed that the vehicle would not be covered under warranty or recall. The vehicle was not repaired. The failure mileage was approximately 99,000.

- Winter Haven, FL, USA

problem #333

Aug 182022

Optima

  • miles
I been reported the recall about my car engine and other problems thats going on with it but the manufacturer won-??T fix it so what else can I do to have all these recalls fixed

- Talladega , AL, USA

problem #332

Aug 102022

Optima

  • miles
While driving at 65 mph check engine light turned on and I lost all power. Very dangerous. This is the second time this has happened and the second time I have reported this emergency situation has occurred. The last time this happened in 2019, Kia replaced engine then wiring harness. Your assistance is needed to prevent this doesn-??t happen to other drivers.

- Midlothian, VA, USA

problem #331

Jul 252022

Optima

  • miles
As the car was running on the intersection, all the emergency lights came on from the vehicle. The car completely stopped but I was able to move it to a safe space. When I attempted to turn on the car again smoke came out of the engine.

- Pacoima , CA, USA

problem #330

Jul 152022

Optima

  • miles
Engine Failure due to rod bearing issues-faulty manufacturing parts appears to have gotten into engine preventing or binding the engine so that it will not start.

- Rising Sun, MD, USA

problem #329

Jul 312022

Optima

  • miles
Recently has a new engine installed at pitre Kia, due to a recall malfunction, they installed a new engine but didn-??t fix the recall problem, now that I have my car back. My engine moves when I hit the brakes, my brakes go all the way down sometimes, doesn-??t stop the car at all, I am in danger everyday I drive my car, I never know if my brakes will fail on me. Or my car will burst out into flames, and I can smell fuel in the cabin of the car really strong, I have really bad gas mileage and my steering wheel is a lot stiffer than normal

- Santa Fe , NM, USA

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