2015 Kia Optima
Problems, recalls and owner-reported issues
Engine is the leading concern among 1,008 owner complaints filed for this model year. This is the 2nd highest complaint count among 20 Optima model years with reports.
Of the 2015 reports, 31 involved a crash and 74 involved a fire. 23 people were injured and 1 person died.
What owners report most often
Recalls and investigations
Service brakes, hydraulic, antilock/traction control/electronic limited slip, control unit/modulePark outsideSep 25, 2023
Kia America, Inc. (Kia) is recalling certain 2010-2019 Borrego, 2014-2016 Cadenza, 2010-2013 Forte, Forte Koup, Sportage, 2015-2018 K900, 2011-2015 Optima, 2011-2013 Optima Hybrid, Soul, 2012-2017 Rio, 2011-2014 Sorento, and 2010-2011 Rondo vehicles. The Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can result in an engine compartment fire while parked or driving.
An engine compartment fire while parked or driving can increase the risk of injury.
Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the HECU fuse, free of charge. Interim notification letters, notifying owners of the safety risk, were mailed November 14, 2023. Owner notification letters were mailed March 29, 2024 through June 18, 2024. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC284.
Campaign 23V652000 on NHTSA.gov
Service brakes, hydraulic, antilock/traction control/electronic limited slip, control unit/modulePark outsideMay 10, 2021
Kia Motors America (Kia) is recalling certain 2013-2015 Optima and 2014-2015 Sorento vehicles previously recalled under recall 20V-519. Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short.
An electrical short in the HECU increases the risk of a fire while parked or driving.
Owners are advised to park outside and away from other vehicles and structures until the recall repair is completed. Dealers will install a new multi-fuse, and inspect the HECU for leaks, replacing the HECU if necessary, free of charge. Owner notification letters were mailed on July 2, 2021. This recall supersedes previous NHTSA recall number 20V-519. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC212.
Campaign 21V331000 on NHTSA.gov
Service brakes, hydraulic, antilock/traction control/electronic limited slip, control unit/modulePark outsideAug 27, 2020
Kia Motors America (Kia) is recalling certain 2013-2015 Optima and 2014-2015 Sorento vehicles. Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short.
If the HECU short circuits, there is an increased risk of an engine compartment fire.
Kia will notify owners, and dealers will inspect the HECU for leaking brake fluid and replace the HECU if necessary, free of charge. Owners are advised to park outside and away from other vehicles and structures until the recall repair is completed. The recall began October 20, 2020. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC197.
Campaign 20V519000 on NHTSA.gov
Fuel system, gasoline, delivery, hoses, lines/piping, and fittingsDec 19, 2018
Kia Motors America (Kia) is recalling certain 2011-2017 Optima, 2012-2017 Sorento and 2011-2018 Sportage vehicles that previously received an engine replacement under recall number 17V-224, warranty, or the Knock Sensor Detection System (KSDS) Product Improvement Campaign. The high pressure fuel pipe that connects to the fuel pump outlet may have been damaged, misaligned or improperly torqued during the engine replacement procedure, possibly causing a fuel leak.
A fuel leak in the presence of an ignition source can increase the risk of a fire.
Kia has notified owners, and dealers will inspect and replace the fuel pipe, as necessary, free of charge. The recall began January 17, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC172.
Campaign 18V907000 on NHTSA.gov
Representative owner complaints: engine
647 reports, newest first. Show all
Power train, Engine, Fuel/propulsion system, Mar 28, 2022
1. The O2 Sensor malfunctioned causing check engine light to come on. The Catalytic Converter failed or malfunctioned, an it is available for inspection upon request. 1wk after replacement of O2 Sensor installment, check engine light illuminated once again. [Official diagnosis was the catalytic converter was faulty but no mention of replacing 02 once catalytic converter was fixed]. 2. My safety as well as my children's safety was put at risk because there was and still is (even after repairs made from dealership where car was purchased) an issue with broken exhaust system and leak. A broken exhaust system poses extreme danger because it releases carbon monoxide (CO)- an odorless ,tasteless, highly toxic gas, which can travel in passenger area and cause carbon monoxide poisoning. Overexposure to this odorless and colorless gas can cause death. Even in mild cases of exposure to CO can cause headaches, dizziness, nausea and fatigue. I need not mention that the extreme or excessive temperatures caused severe discoloration where the three- way catalyst is located. The pistons could have melted as well could have caught the car on fire .My safety as well as every occupant that ever traveled in the vehicle thus far, was at risk. The exhaust leak was big enough to affect the oxygen levels, to spring that code. Another safety risk was when owner of car was falling asleep at wheel of car while driving, not knowing there's a leak. This put the owner and the vehicles occupants at risk which is the greatest threat by far. 3. The problem has been confirmed by Rivard Buick GMC. 4. The vehicle has NOT been physically inspected by the manufacturer or police but has been insoected by insurance representatives. Yes there warning lampsthat appeared as the check engine light came on each time the exhaust system was malfunctioning. There was/ are other symptoms prior to the failure 1st appeared 11/01/21 o2 Sensor, 11/15/21 catalytic converter, 01/28/21 symptoms wo
Engine, Mar 23, 2022
Engine locked up exactly like it is described in NHTSA ID Number 1147025. The manufacturer refuses to honor the civil suit judgement on this vehicle due to the previous owner and a Kia dealer not performing 1 recall.
Engine, Mar 16, 2022
The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, there was a knocking sound coming from the engine with the check engine warning light illuminated. The vehicle was towed to the dealer where it was diagnosed with engine code P1326 (Knock Sensor Detection System) and failed the bearing test. The dealer informed the contact that the engine needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure and advised the contact to file a complaint with the FTC. The failure mileage was 129,272.
Engine, Mar 15, 2022
DEAN MCCRARY OF MOBILE AGREED TO FIX ALL ACTIVE RECALLS ON THIS VEHICLE ON 11/3/2021. THEY KEPT MY CAR UNTIL 12/4/2021 CAUSING HUNDREDS IN RENTAL FEES. MY CAR STILL HAS AN ACTIVE RECALL WHICH WAS ISSUED IN MAY, 2021. THE SERVICE MANAGER ASSURED ME ALL RECALLS WOULD BE REPAIRED.
Engine, Mar 6, 2022
The morning of 3-1-2022, after driving for approximately 5 minutes, I noticed a ticking/knocking coming from the engine area. 10 minutes later, I stopped and opened the hood and it was definitely coming from the engine. This continued that evening when I went home. Sometimes it was quiet, but others times loud. I dropped it off at my mechanic the next morning, they later called saying it was an internal engine knock and they couldn't do anything with it. The next day I took it to another auto repair mechanic and was told the same thing, but they also said it needed a new motor, but to contact kia for any recalls. There are none for my 2015, but 2011-2014 DID have recalls and they were for the same problem I was having. I was given an appt for the following Tuesday, but by Friday afternoon the engine completely shut off while I was driving. Luckily, I was able to coast to a safe location. My check engine light NEVER came on for the 4 days I was having problems with it.
Engine, Mar 5, 2022
While driving on the highway, car suddenly lost power which was dangerous because there was no shoulder to pull over out of the way of other vehicles, & another car could have slammed into the back of mine, luckily was able to coast far enough exit highway. Had car towed to shop was told the engine had seized up. With no warning at all. Then I learned about the recall for this car, unfortunately a little too late in my case.
Engine, Mar 4, 2022
While driving the vehicle the engine shut off with no warning in heavy traffic. 10 seconds before the check engine light came on and then just seized. 3 police officers came to push the vehicle to the roadside out of traffic. I never Knew of a KSDS install on this vehicle and Kia admits that there is a defective engine but will not fix the car since this install was not complete. The police officers told us that we were extremely lucky to have not been injured in an accident as we sat in the middle of the highway. So we now have a vehicle that we are paying for with a seized motor that kia admittedly knows was defective but they refuse to fix. We never got a notice to have this installed. When I look on your site, there is a recall but for something completely different. How are we to know anything needs to be installed if we are not notified and it’s not listed under the VIN? Please help! There are thousands of us with this same issue!
Engine, Feb 28, 2022
Every morning when I start the car and try to accelerate the car has no power, I have to stop turn the car off and restart the car again for their to be power. This simple restart works for a couple months before the check engine light comes on. When I take the car to Kia they tell me that because the diagnostics machine isn’t giving them a code they don’t know what to fix, however the diagnostics machine resets the check engine light and the process starts all over. This all started right before Kia replaced the motor on a recall. The car is doing the same thing as it was when I had it towed to them and they said the motor was seized up.
Electrical system, Service brakes, Engine, Feb 19, 2022, fire
Vehicle lots brakes while driving, smell of gas and caught fire under hood. Engine had been completely replaced due to recall in January 2022 Vehicle was a complete loss, luckily son was able to get out.
Engine, Feb 16, 2022
Battery, Fluid and Engine light came on and all the sudden car stop and died in the middle of the highway.
Other or unspecified, Engine, Feb 10, 2022
I have a 2015 Kia optima that started experiencing problems the week of January 26th. I contacted Kia Consumer Affairs and was advised to have my car towed to Van Guard Kia of Arlington TX since there were 2-3 recalls on the car that I was not aware of. I was told by Kia Consumer Affairs that if the problem with my car was related to a recall, that Kia would be responsible for the repair. I spoke with George (service manager at dealership) today and he informed me that my car would need a new motor and this is due to the recalls on the car. George also stated that I would be responsible for the cost of the repair. I contacted Kia Consumer Affairs again this morning and was told they would have to call dealership and get more information. I've never had any problems with my car besides regular maintenance. The problem with my car started within 1 week. I find it highly offensive for Kia to ask for me to pay for repairs for a issue with my car that I didn't cause. I owe less than $2,000 on my car and I have never been late on my payments. The cost of a new motor is $5800 plus tax. I shouldn't be responsible for any repairs that are due to a recall on the car.
Engine, Feb 9, 2022
The contact owns a 2015 Kia Optima. The contact stated while driving approximately 30 MPH, the vehicle inadvertently stalled. The contact stated no warning light was illuminated. The vehicle was unable to be restarted and the vehicle was towed to an independent mechanic where it was diagnosed with needing the engine to be replaced. The vehicle was not repaired. The vehicle was then towed to a local dealer who also stated that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure but offered no assistance. The failure mileage was 98,123.
Engine, Feb 8, 2022
My engine blew while driving home from work. I was driving 60 mph and the rod went through the bottom of my engine
Engine, Feb 8, 2022
The contact owns a 2015 Kia Optima. The contact stated that while driving approximately 72 MPH, the engine seized and the vehicle stalled inadvertently. There were no warning lights illuminated. The vehicle was unable to restart and was towed to the local dealer to be diagnosed. The contact was informed that the rod bearing needed to be replaced. The contact stated that the dealer also informed him that the knock sensor repair was not previously completed on the vehicle; however, the contact never received a notification from the manufacturer regarding the knock sensor. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was approximately 190,000.
Engine, Feb 8, 2022
ENGINE FAILED, CHECK OIL LIGHT OR CHECK ENGINE LIGHT NEVER CAME ON. HAD TO PUT A NEW MOTOR IN THE CAR AND KIA WOULD NOT FIX. PRODUCT UPDATE CAME ON THE CAR PRIOR TO US BUYING IT, SO WE HAD NO IDEA. CAR STOPPED ON A 2 LANE HIGHWAY WITH NO WARNING, LUCKILY NOONE WAS INJURED. THERE WAS A CLASS ACTION LAWSUIT REGARDING THIS ISSUE, HOWEVER IT WAS ALREADY CLOSED SO NOTHING WE CAN DO. KIA IS AWARE OF THE ISSUE THEY SHOULD BE RESPONISBLE FOR FIXING IT.
Engine, Feb 5, 2022
Without warning, my car died while I was driving it. The engine locked up. The engine is toast. No reason for this to have had happened. I'm now without a vehicle as a single mom. Thank God I wasn't turning in front of a semi when it just randomly died!
Vehicle speed control, Engine, Fuel/propulsion system, Feb 1, 2022
My check engine light came on Sunday January 23rd. Upon Contacting my local Kia Dealership, I was told that my vehicle has recall # SC212 at which time was advised to bring my vehicle into the Kia dealership for diagnosis. On Friday, January 28th I dropped my vehicle off at my local Kia dealership and within 3 hours received a call from my Service Advisor who stated the following issues were found: 1. Oil leak; REPLACED: Valve cover gasket, high pressure fuel line, and high-pressureSe fuel pump bolts. 2. Recall SC212; REPLACED: Multi-Fuse and Fuse Box Cover per campaign instructions. 3. Serpentine Belt; REPLACED: Drive Belt 4. Brake Pads; REPLACED: Front Brake Pads and Machined Rotors. 5. Brake Pads; REPLACED: Rear Brake Pads, in addition to Replacing both rear rotors. 6. REPLACED: Cabin Air Filter 7. REPLACED: Engine air filter 8. Oil and Filter Change; Performed LOF, set tire pressures, and topped off all fluids. Less than 72 hours after the above repairs were complete, and a hefty $1,500.00 repair bill, my check engine light is BACK ON! My vehicle lacks acceleration when depressing the gas pedal and I am fearful my vehicle may have the defective Theta II Engine in it. I am a single parent with a 7 year old child and this has caused us to not feel safe driving our vehicle, not to mention I have had to miss multiple days of work and my daughter has missed several days of school now because we do not have a safe vehicle to commute to school and work in. Also, when searching my vehicles VIN number, it says the recall was not fulfilled? VERY CONCERING! I have the vehicle diagnostic data in my UVO Services account, in addition to itemized repair bill from Kia.
Engine, Jan 20, 2022, fire
The contact owns a 2015 Kia Optima. The contact stated that while driving at 25-30 MPH on a one-lane road, the vehicle inadvertently began to stall. There were no warning lights illuminated. The contact stopped and turned off the vehicle but was unable to restart the vehicle. The contact attempted to jump-start the vehicle with the assistance of her friend however, the vehicle failed to start. The contact’s friend informed her that he smelled a burning odor. The vehicle was towed to the contact’s residence. The vehicle was then towed to an independent mechanic who diagnosed that the battery, the starter, and the engine had failed and needed to be replaced. The dealer was notified of the failure and advised the contact to bring the vehicle to their location for diagnosis. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 126,620.
Engine, Jan 20, 2022
The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, the vehicle stalled without warning. The vehicle was towed to the contact’s mother’s residence and then to the contact’s residence. The vehicle was then towed to an independent mechanic who was unable to determine the cause of the failure. The contact called the local dealer and was informed that a software update had not been completed. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure however, no further assistance was provided due to a discrepancy. The approximate failure mileage was 144,000.
Engine, Jan 17, 2022
The piston and valve are failing and yes it is available for inspection. My vehicle lost power in the middle of the freeway. I took it to the dealer and they said there was loss of compression in number 3, and there was cylinder scaring which they then said the valve malfunctioning. They then sent my claim to Kia motors and they said they aren’t going to put it under the warranty. There was no warning or any type of message before the incident.
Engine, Fuel/propulsion system, Jan 13, 2022
THIS CAR HAVE PROBLEM ENGINE AND KNOCK SENSOR P1326. FUEL PROPUSION.SYSTEM. I LOST DAYS OF WORK ..AND MONEY TOO.I LOST MY JOB Consumer stated vehicle is still in the dealership.
Engine, Jan 9, 2022
The engine on my 2015 Kia Optima failed as I was entering a freeway at night time. There was no indication that anything was wrong with the car on the dashboard and it had been running fine for about 15 minutes prior to completely shutting off without warning. When my car was taken into the dealership in Carson, CA, it was inspected and I was advised by the technician that this issue was a recalled one. He stated that he had seen this issue in many cars but could not begin to fix it until it was reviewed by their corporate office. Days later, the corporate office advised that they would not cover fixing this recalled issue and had passed the problem on to the extended warranty company. Then, the inspector from the extended warranty marked the engine's inspection as inconclusive. Kia and their extended warranty partner say that we must pay them $1100 to take the engine apart and take pictures of it. Before the engine failure, there were no indicator lights from the car advising there was maintenance required. The oil has been changed on time and frequently throughout ownership and the records were in the glove box for the various inspectors to view. The brakes have been changed regularly and the battery had to be replaced one time within the first year of purchasing this vehicle. Besides that, there had been nothing to indicate something of this magnitude would happen to this vehicle.
Engine, Jan 9, 2022
I was driving my 2015 optima on 1-5-22 on a 4 lane road going up a hill the car stalled dash lit up like a Christmas tree. Car would not start I was stuck in heavy traffic. I had to have it towed to my house. This vehicle had a recall repair done in 2017 for this same issue. The dealership replaced the engine. I have not taken it to the dealership. Mileage at failure 173,000.Milage at first failure 57,000.
Engine, Jan 7, 2022
Wife dropped car off to have oil change done at local mechanic shop we have done business with for years on 1/3/21 during her lunch. Wife picked car up after completion of oil change and drove back to her work approximately 1 mile away. Child seat was in the Optima so when I got off work I went and changed cars with her so I could pick up grandchild. When started it had a ticking sound and about 3/4 of a mile later it started shaking and making a loud rattling sound. I drove another 1/4 mile to home and parked it. No check engine light came on. My immediate thought was that the oil plug might have been left out. I checked the oil and it was full. I called mechanic and asked if it had any issues or sound and start up and he responded that it did not. He told me to bring back over and he would look at. He checked oil and it was full. He drained and replaced filter and oil again to see if that might possibly remedy. It did not fix or help issue. We talked and decided to leave it there for him to look into. At 5:31PM he called me back and stated there were several recalls on Kia. We decided for him to not tear into engine in case this was covered. Bought car 3 months ago from a local dealer and engine only has roughly 116K miles. Calling Kia customer service to see if this is covered due to so many engine issues from 2011-2016 models.
Engine, Jan 5, 2022
The vehicle’s (2015 Kia Optima Hybrid) engine died suddenly in the middle of a busy intersection (I had the green light). It alerted suddenly that the hybrid battery could not charge the engine (first time this type alert has ever come up); the engine made a loud, metallic scraping sound and then died. The car stopped instantly after the sound and my safety, as the only person in the vehicle, was put in danger of getting hit by other vehicles driving through the intersection. I was honked at and had a near miss from the vehicle immediately behind me. The car was towed to a Kia dealer, has been inspected and is in the process of total engine replacement. The vehicle has just under 69,000 miles and has been out of commission at the dealer since November 27, 2021.