Home · 2012 Kia Optima · Complaints

What 916 owners told NHTSA about the 2012 Kia Optima

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (916)Crash / fire / injury (106)Engine (397)Steering (187)Electrical system (122)Brakes (87)Fuel system (54)Transmission & drivetrain (54)Airbags (48)Speed control (40)Body & structure (39)Lights (31)

397 of 916 complaints match · Engine · clear filters · page 2 of 16

Sep 23, 2024Fuel systemEngine

The contact owns a 2012 Kia Optima. The contact stated while driving at various speeds, the vehicle went into LIMP Mode and failed to exceed 61 MPH. The RPM failed to exceed 2,000 RPM. Additionally, the contact stated that the vehicle failed to exceed 45 MPH while driving uphill, and the vehicle failed to exceed 55 MPH while driving downhill. The contact scanned the vehicle with a vehicle scanner and retrieved codes indicating an oil control valve failure. The contact replaced the oil control valve; however, the failure recurred. The vehicle was taken to the dealer where the fuel rail system, the fuel tube clamps, and the bolts were replaced under NHTSA Campaign Number: 18V907000 (Fuel System, Gasoline, Engine); however, the failure persisted. The vehicle was taken back to the dealer several times. The dealer replaced the battery, the engine oil, and other unknown parts; however, the failure recurred. Additionally, the contact stated that the vehicle was experiencing excessive fuel consumption. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 157,000.

NHTSA ODI 11615918

Aug 23, 2024Engine

Car went to limp mode and has code p1326. Car was towed to kia and waiting on determination of kia in korea to cover engine. Car has 63,000 miles

NHTSA ODI 11610532

Aug 21, 2024Engine

Driving on highway at about 60mph when the engine started knocking and the power decreased significantly. I pulled to the side of the road and called my day who came and brought his OBD 2 tester. The code was P1326 which is Knock Sensor. We had the car towed to a KIA dealer nearby and they updated the software. We picked up the car the next day. It seemed fine at first. Within two weeks the the same thing happened and we, once again had it towed to KIA. Within a few days, the service writer called and said that the engine needed to be replaced, but that KIA was denying an engine replacement. They said that they found sludge in the engine that in their opinion showed a lack of maintenance. We sent in receipts for oil changes every 5-6K miles. At this point, we do not have an answer regarding an engine replacement.

NHTSA ODI 11610060

Jul 31, 2024EngineFire

The engine caught fire and exploded after I parked it and exited the car and the recall repair was done on the engine July 5 2024 by Kia dealership.

NHTSA ODI 11605728

Jun 8, 2024Engine

I started the car up no lights on, started fine, no warning symptoms like loss of power, no oil consumption nothing! Started an hour and a half drive to visit family and I started hearing a weird sound almost like plastic was flapping around on the bottom. Turned down the music and it was only making this weird sound every 5-10 seconds. Pulled off of the road shut the car off and checked under the hood, the oil everything seemed fine. Started it up and heard the sound again and suddenly became worse and came to the conclusion it’s a rod knock. Had to get off the busy road so continues for maybe 1 mile and every dash light came on shut it off waited for a trailer, once we got it on the trailer the lights were gone. The dealership near me is saying they can’t do anything due to a recall update not being done but I had a newly programmed ECU that was put in in March of 2023 and I was some research and i found a few things stating the ECU would be completely up to date but kia is fighting me on it. I have also been update to date on maintenance records. Since its been at the dealership I’ve asked for the other 2 recalls that are open on it to be done while I figure out what to do with it and they bypass me asking everytime.

NHTSA ODI 11593199

May 29, 2024Engine

I was driving down the highway on my way to work and all of a sudden I lost power. The car was still on but it wouldn't go very fast and started smoking. Then a knocking noise started. I had to get it towed home. Car is not running. KIA refuses to take responsibility even though there is a known issue with this vehicle.

NHTSA ODI 11591392

May 11, 2024Engine

The engine failed, and it is past the 100,000 mile warranty. Due to the fact that there were no warning lights at any moment prior to the engine failing, my safety and others were put at risk. The 2012 Kia Optima suddenly stopped in the middle of a major road, which could have easily caused a collision had another vehicle been any closer to me. The component was inspected by a mechanic, and there were no symptoms prior to the car stopping.

NHTSA ODI 11588259

May 1, 2024Body & structureEngine

My vehicle has not repaired. I have not been in an accident. However there are two open safety recalls for my car and I am terrified that myself or someone else is going to be injured or even killed due to this problem has yet to be resolved. The first recall for my car is the headliner plates. I took my car into my local dealership (Stokes Kia of Goose Creek) and they told me it would take 10 business days before they could inspect my car and determine what the problem is (it’s a recall so I don’t understand why they would have to identify a problem that was clear in recall letter). However, I asked if they would repair my car within that 10 day period if they “identified” the problem. They told me it could take an additional 10 business days or longer for the repair (for them to get around to fix it because they were extremely backed up). I asked if I would be provided a loaner vehicle or rental and they told me no. They instructed to try the other Kia dealership which is much further away from me. I ended up trying the other Kia dealership. However, they told me they would not provide a loaner car but they did schedule an appointment for my repair. They told me it should not take long for the repair but they could have my car for about 3 days until they can get around to fixing it. I went along because I wanted the issue fixed so I prepared to make arrangements for the possibility that I wouldn’t have a car for 3 days. However, like the day or so before my appointment Kia Country called me saying that the parts for the repair were on a national back order and that I would be notified when they are available. I have yet to notified. Now there is another serious recall that there is no remedy for. I am extremely uncomfortable with my car with these recalls that can’t be fixed. This is not my fault so I shouldn’t have to suffer or be without a car due to these problems. I want to know what other options do I have?

NHTSA ODI 11586278

Apr 16, 2024LightsEngine

Desconocido

NHTSA ODI 11583434

Apr 12, 2024Electrical systemBody & structureEngineFire

I did not know about this recall and my dad was driving my car caught on fire and blew up now I do not have a car please help.

NHTSA ODI 11582735

Mar 19, 2024BrakesLightsEngine

The contact owns a 2012 Kia Optima. The contact stated that the brake lights continuously remained illuminated. The taillight bulbs blew out on several occasions. The check engine warning light was illuminated. Additionally, there were several unknown warning lights flashing. While driving at various speeds, the vehicle hesitated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The contact stated that the failure was related to NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The manufacturer was not contacted. The failure mileage was approximately 24,000.

NHTSA ODI 11578197

Mar 8, 2024Electrical systemEngine

Was driving on the road on the way back to work from lunch, started hitting the brakes at an upcoming stop light, and the car shut down. There was no lights indicating anything prior to the incident. I tried starting it again and it started smoking, I then opened the hood and all the smoke poured out. The engine bay smelled like something electrical melting or of some sort. I towed it to the dealership I work at and had my ex-kia technician coworkers look at it and said they've never seen anything like it, but did confirm the smell was electrical. OBD II reader was not reading anything at all. I was letting it sit for a while waiting for the recall to have some sort of remedy, but I've grown tired waiting so I decided to file a complaint. And I will reiterate again that NONE of the lights came on at all until my car decided to break down.

NHTSA ODI 11576204

Feb 27, 2024Engine

COMPONENT HAS FAILED. CAR IS NOT DRIVABLE AND THERE IS NO REMEDY FOR THE RECALL.

NHTSA ODI 11574190

Feb 1, 2024Engine

When attempting to acceleate rapidly, as if passing someone, the car will decelerate and eventually die, leaving you stranded on side of road or in the highway.

NHTSA ODI 11569277

Jan 23, 2024Fuel systemEngine

The contact owns a 2012 Kia Optima. The contact stated while driving at approximately 55 MPH, the vehicle hesitated. The vehicle lost motive power and was slow to accelerate. The check engine warning light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the high-pressure fuel pump was failing. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The contact stated that the failure was related to NHTSA Campaign Number: 18V907000 (Fuel System, Gasoline, Engine). The approximate failure mileage was 88,800.

NHTSA ODI 11567320

Jan 12, 2024Electrical systemEngine

It has started burning oil, we have to continually check it. There are no leaks but oil burns too fast, we check it almost daily.

NHTSA ODI 11565032

Jan 10, 2024Engine

The contact owns a 2012 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The contact stated that while driving at approximately 80 MPH, the vehicle stalled. The vehicle was placed in neutral(N) and steered to the side of the roadway. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

NHTSA ODI 11564664

Jan 4, 2024BrakesEngine

The contact owns a 2012 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power, stalled, and failed to restart. There was no warning light illuminated. The vehicle was towed to the residence. The vehicle was then taken to the dealer, but no assistance was provided. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 138,450. VIN tool confirms parts not available.

NHTSA ODI 11563519

Dec 22, 2023Electrical systemEngine

When driving the vehicle the engine light is on & under the hood is smoking . It smells like burnt rubber or just burning something. This started happening right after the engine light came on. It’s not safe to drive my vehicle at this point

NHTSA ODI 11561561

Dec 8, 2023BrakesElectrical systemEngine

The contact owns a 2012 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. The contact stated that while starting the vehicle, she noticed smoke coming from underneath the hood of the vehicle. Additionally, the contact stated that the taillights remained illuminated while the vehicle was turned off. There was no warning light illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue, but no assistance was provided. The failure mileage was approximately 130,000. VIN tool confirms parts not available.

NHTSA ODI 11559101

Dec 3, 2023Engine

On September 27, 2023 I was driving home at 50 mph on 41st & Lynn Lane in Tulsa, Broken Arrow, OK. The car just shut down right before I had to stop at a stop sign. Not being mechanical minded the only thing I could think of was to call a towing company (AAA). I was informed to also call 911 to have a police officer come and block traffic to keep me from getting hit. It was towed to the only garage there is close to my house as the Ferguson Dealership couldn't take it at the time. It was at a place called The Garage. They at the time told me they thought it was the fuel pump and replaced it. The work was done on October 2, 2023. On November 26, 2023 I was driving home on the Cimarron Turnpike when the car just lost power. I pulled over as best I could and did after a bit get it to start again. I called my brother to see if he would follow me home as the car jerked and would only do 60 mph. I put on my flashers and my brother did follow me home. I have researched the trouble and saw a recall #147 (Kia's # I believe. it is a recall for the engine and something to do with the KSDS. Kia Dealership ( Ferguson Kia) again couldn't take the car so I took it to The Garage again and received a call from the tech that I need another motor. I am calling Kia Corp to see if they will replace it.

NHTSA ODI 11558201

Nov 28, 2023BrakesEngineFire

The contact owns a 2012 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic) however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had experienced a failure. The contact stated that his wife was driving the vehicle at approximately 35 MPH when she was she flagged by another driver that her vehicle was emitting flames under the vehicle on the front driver's side near the wheel well. The contact stated his wife was not aware of any warning lights and pulled the vehicle over and stopped. The contact stated the fire department was on scene and extinguished the fire. The vehicle was towed to a local dealer, the contact had no information on the diagnosis by the dealer. The vehicle was repaired. The failure mileage was approximately 116,000. The contact related the fire to the current NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The contact stated that the vehicle was recently returned to the dealer due to engine failures. VIN tool confirms parts not yet available.

NHTSA ODI 11557223

Nov 27, 2023Engine

THE ENGINE QUIT WHILE ON THE HIGHWAY TO MY HOME. I WAS DOING THE SPEED LIMIT OF 75 MPH WHEN I HEARD A NOISE AND THE CAR STARTED LOSING SPEED. I COULD BARELY PULL TO THE SHOULDER OF THE ROAD. THERE WAS A LOT OF TRAFFIC AND THOUGHT I WAS GOING TO BE HIT BEFORE GETTING PULLED OVER. I THEN NOTICED THE ENGINE LIGHT WAS FLASHING. I HAVE HAD NO TROUBLE UNTIL YESTERDAY, NOV. 26, 2023. I HAD TAKEN MY CAR TO THE DEALERSHIP FOR RECALL #SC147. WHETHER IT HAD BEEN TAKEN CARE OF I WAS NOT TOLD. I ALSO WAS NOT TOLD THE ENGINE COULD BE REPLACED AT THEIR EXPENSE. THE REPAIR DATE WAS 11/22/2017.

NHTSA ODI 11556996

Nov 22, 2023Engine

A piece of carbon build up was caught on the exhaust valve not allowing it to close and causing no compression. The carbon build up is known in every kia engine as everyone knows they came out the factory with defects. With the exhaust valve burnt it scored the cylinder and none of it is covered under the extended warranty and I have seen many people with the same problem and all the dealership does is grind off the burnt oil on the exhaust valve and return it to the costumer while it is a ticking bomb. It is known to the dealership that this is a defect in the engine and which they told me on the phone while all calls are recorded. There was no sign that this was going to happened to the car. I was driving and the next second the car is shaking violently with the engine light on.

NHTSA ODI 11556521

Nov 20, 2023Engine

I always smell like something burning and melting at the engine And the engine light sign appears and the maintenance light also

NHTSA ODI 11556155

← NewerOlder →

Working with the data? Download all 916 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2012 Kia Optima verdict →