10.0

really awful
Crashes / Fires:
8 / 38
Injuries / Deaths:
7 / 0
Average Mileage:
49,036 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 3 of 25)

« Read the previous 20 complaints

problem #446

Oct 272023

Optima

  • miles

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

Engine lost power and when restart was attempted, it could torn turn over. Tried restarting 3 times with no success. After this, smoke started coming from the hood. I opened the hood and noticed a small flame at the driver side bottom of the engine compartment. Flame intensified and grew and eventually I extinguished with a fire extinguisher. I had just replaced the starter that same week and replaced some wiring at a local car repair facility.

- Madison, AL, USA

problem #445

Oct 132023

Optima

  • miles
Bought car February 22 less than 5200 miles. Died on hwy October 6. Kia denied claim. Had no ideal of a software update. Never heard of that in my life. Almost lost my life with this car

- Bethany, OK, USA

problem #444

Oct 192023

Optima

  • miles
Kia has a Nation Wide Campaign for faulty engines, that will display a code (consistent in the campaign), my daughter purchased a 2015 Kia Optima, 76,000 miles, that was a rebuilt title, however the damage was on the back passenger door, body damage only. Was surprised it was even totaled out from the insurance, however due to the high theft issues with Kia's insurance companies are paying them out to avoid the theft as well as the engine issues. Currently, Kia is telling us that they will not replace the engine (even though this is the campaign they are advertising) due to the rebuilt title, even though the defective engine is from the manufacture and nothing to do with the body damage to the back passenger door. This car was repaired in full and cleared to be re-titled as a rebuilt title. These engine issues can cause the vehicle to seize while driving, it goes into Limp mode (safety mode) which reduces the speed and power to the engine and there are reports that the engine can catch fire. Kia is doing these engine replacements under the MFG warranty and have stated they are lifetime replacements, due to the continued problems and yet they want to not replace hers when a insurance company decided to total the car our for damage that could have been repaired.

- Pueblo West, CO, USA

problem #443

Oct 132023

Optima

  • 96,000 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 while driving 60 MPH, the vehicle slowed down and then became inoperable. The battery and check engine warning light were illuminated. The vehicle was towed to a dealer. The vehicle had been diagnosed. The contact was informed that the failure was due to a faulty engine block. The manufacturer was not made aware of the failure. The failure mileage was approximately 96,000.

- Houston, TX, USA

problem #442

Oct 132023

Optima

  • miles
My engine locked while driving on the highway, I have got the car inspected twice since I purchased it and only had it for a year and it passed, everything worked fine and no hazard lights were on dashboard until it stopped then the battery and engine light showed when stopping! I had no problems with the car prior to it, just stopping on me I had my kids with me and we were going to another state so that-??s dangerous! I had to get it towed to a Kia dealership and was told they had 4 recalls on my car and the problem was the engine locked but I was told they would not do it free of charge or under warranty because the car has a salvage title overall the car was still drive able and in good condition up until that point.

- Houston , TX, USA

problem #441

Apr 122023

Optima

  • miles
My car started smoking while parked at work for no reason and I had to call the fire department. It stop smoking by the time the fire department came. I had it towed to the Dealer. My brakes are a mess but especially on a wet road you have to pump them to try to stop. I have taken it to the Dealer and of course they find nothing wrong. I told them to test drive it on a wet raining day and try to stop hard. Supposedly they could not but I have almost been it several accidents and had to run through a red light because I could not stop. So, I try to drive this car on a rainy day or drive slowly. This car has been trouble since I got it and the dealer will not listen.

- Laurel, MD, USA

problem #440

Sep 132023

Optima

  • miles

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

Motor failed and Kia replaced the motor. Now my dim lights and fog lights will not work. All fuse, relay, etc.. has been tested along with bulb replacement-??

- Fort Payne, AL, USA

problem #439

Sep 182023

Optima

  • miles
My Kia optima has been having engine issues regarding fluid spilling in different components of the vehicle, first started within spark plugs, then in the exhaust camshaft, once I fixed those two issues it's now spilling within my wiring hardness. I was told to fix my valve cover which I did but oil is still spilling out from the engine and into other components. The vehicle stalls while driving on the highway which is unsafe for myself and other drivers due to the speed slowing down without warning until after the decline in speed. I've went to an independent service center, but once new issues arouse I assumed he was just trying to get more money out of me but I even brought it to Kia and still seems to have issues occur. I received an engine light warning when the vehicle stalls, there is times where the car actually turns off but not completely ( I guess due to the car being in drive mode) and I have to actually push my engine start/stop button for the engine to start again.

- Seffner, FL, USA

problem #438

Oct 072023

Optima

  • miles
Engine Rebuild/Replace: #4 CYLINDER WALL DAMAGE ALLOWING OIL INTO COMBUSTION CHAMBER I have kept very good care of my car and have provided appropriate maintenance including oil changes 3k-5k with synthetic oil and also recently had full tube up April 2023.

- Pueblo , CO, USA

problem #437

Sep 082023

Optima

  • miles
1st problem happened when I was at a complete stop, at a traffic light, in rush hour traffic. All the sudden steam started coming out from underneath my hood. I instantly looked at my temperature gauge and it did not show anything however I knew something was wrong when the light turned green I immediately pulled over, out of the street as far as I can get without being hit by other cars. I put on my hazard lights. Pop the hood. I had a gallon jug in my trunk. And I walked to a store to fill it up with water. Came back, poured the entire gallon into the radiator. Waited for at least 30 minutes. Started the car and made it home. After that incident, the problems with this 2015 Kia Optima has snowballed. It just amazes me that it has started happening 2000 miles after my extended warranty expired. I had to purchase and replace spark plugs, the coil packs, two other sensor things, which I do have the receipts for and now the car reeks a gasoline and it automatically kicks into overdrive and I lose my reading on my tachometer, this puts it into a disabled mode, I'm on the freeway in Russia traffic, trying to pull over without getting into an accident. Do I believe this is a safety concern? You're damn right I do am I mad yes. I am taking my k i a into the dealership. After doing my research on this make and model, is the dealership doesn't honor what the claims department and the media response to this problem. Will then I will leave the car with Kia because I cannot afford a new engine. I will have to call to finance company and let them know that I voluntary I'm letting them come repo this car, good luck selling

- Corpus Christi Texas, TX, USA

problem #436

Sep 212023

Optima

  • miles

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

I was driving the car 30 mph and the engine just cuts off completely and dies in the middle of the road in traffic. It wouldnt start. There was no time given to pull off the roadway. I get to safely call a tow truck which took them 3 hours to get there. They took it to Kia and there Kia says it has 4 recalls and the engine is seized up. Even though Kia is responsible for motor replacement and has replaced motors in other Kia's they have denied me of a new engine die to their recall. I have paid dearly for that car for 6 years now that im a thousand away from paying it off and having my sanity Kia almost gets me killed on the street and took what sanity I have left. They say they are not going to fix any of the recalls on my car.

- Nashville, TN, USA

problem #435

Sep 082023

Optima

  • 74,000 miles
The contact owns a 2015 Kia Optima. The contact stated while driving after a stop, the vehicle stalled. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to the residence. The vehicle was then towed to an independent mechanic, who informed the contact that an unstated hose had failed, causing the engine to seize. The contact called an unknown local dealer and was informed that the warranty on the vehicle was under another person's name. The vehicle was not diagnosed or repaired. The contact stated that the failure was related to NHTSA Campaign Number 21V331000 (Service Brakes, Hydraulic). The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 74,000.

- Smyrna, GA, USA

problem #434

Sep 102023

Optima

  • miles
Excessive shaking of engine, stalled out while driving on highway, knocking in the engine.

- Chicago , IL, USA

problem #433

Aug 242023

Optima

  • miles
I had oil changed by Jiffy Lube for a very long time dedicated to getting it changed. Anyways, I was driving down the road and all of a sudden the motor started knocking I pulled over and had to have it towed because the knocking was getting louder and louder.

- Huntingtown , MD, USA

problem #432

Sep 072023

Optima

  • miles
My 2015 Kia Optima EX with 56,462 miles which I am the original owner. On 09/07/2024, my vehicle oil light came on and the vehicle was taken to Weston Kia in Gresham, OR. This vehicle has had regular oil changes every 3,000 miles since purchased performed at Weston Kia. The service department found a leaking oil pressure switch and preformed the repairs totaling $248.60 on 09/08/2023. Per Kia 10yr/100,000 Powertrain warranty for original owner "In the Engine: Cylinder block, cylinder head and all INTERNAL PARTS, timing gear, seals and gaskets, valve cover, flywheel, OIL PUMP, water pump and turbo charger, pg. 6." I believe this part is covered per Kia warranty and the definition of drivetrain "A powertrain is a system inside a vehicle, in a car, a powertrain consists of the engine or motor and its internal components, such as the energy storage system, transmission and driveshaft." After reviewing all Kia warranty information and speaking to customer service at 800-333-4542 (Who stated the repairs are not covered), there is no information to the contrary that a oil leaking pressure switch that is located within the engine block is not covered. Kia would not provide any detailed information that shows this part falls outside of the terms of my 10yr/100,000 mile warranty.

- Portland, OR, USA

problem #431

Sep 022023

Optima

  • 94,700 miles
The contact owns a 2015 Kia Optima. The contact stated while driving at an undisclosed speed, the brakes and the steering column were inoperable. The contact stated that several unknown warning lights were illuminated. The contact was able to safely pull off to the shoulder of the roadway. The contact stated that the engine started smoking. The vehicle was towed to an independent mechanic. The vehicle was not repaired. The contact stated that in December 2020 and March 2023, recall repairs were completed on the ABS and TCU modules. The manufacturer was made aware of the failure, and a case was filed. The approximate failure mileage was 94,700.

- Ocean Isle Beach, NC, USA

problem #430

Dec 262021

Optima

  • 115,696 miles
I have 2015 Kia Optima grey or platinum graphite exterior color since Aug 2019 I had an tbone accident last Dec 26 2021 which iam not at fault for never received any type of comfort care claim it was during covid pandemic I was in the process of grieviance being hate left in despair also job loss with no income unstable living situation which I was living on my personal vehicle been going through financial hardship until present I havent been driven until I brought to Kia dealership Jan 1st of 2023 due to my personal injury and car accident it was left parked got towed with busted windows had my personal belongings being gone missing.... I have rough years... it was difficult for me to get back up in my feet my car has recalls arent being repaired fairly. This will be my first time to adhere my concerns I would like to get some assistance if possible...I thank you in advance

- San Diego, CA, USA

problem #429

Apr 182023

Optima

  • 110,000 miles
The contact owns a 2015 Kia Optima. The contact stated that the vehicle was experiencing an abnormal oil consumption. The contact stated that she had been adding engine oil to the vehicle every 400 miles. The vehicle was taken to the dealer however, the failure could not be duplicated. The contact was informed that the vehicle had to experience catastrophic engine failure to be repaired. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 110,000.

- Greensboro, NC, USA

problem #428

Aug 052023

Optima

  • miles
I was driving North on the 57 freeway and my car stop running and I pulled on the side of the freeway and my car catch on fire. Everything started in the engine. I called Kia and made a complaint and they told me it was not under warranty and they could not help me.

- Pomona, CA, USA

problem #427

Aug 282023

Optima

  • miles
I-??ve had my 2015 Kia optima since 7/11/23. My dipstick showed oil full. I drove it 977 miles from 7/11/23 until August 23 2023. My oil went from full mark on dip stick to low. My vehicle I purchased had 66,892. I should think it shouldn-??t be losing a quart oil in a little over a month. I had to add a quart of oil. This is unacceptable.

- Kansas City , MO, USA

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