294 of the 786 complaints about the 2014 KIA Optima are about the engine — 37% of everything reported for this model year. Half of the failures with a mileage on record happened before 88,000 miles.
294
Complaints
8
Crashes
29
Fires
9
Injuries
Filed with NHTSA, in their own words.
ENGINE
While driving the engine seized In April 2026 on the interstate. The vehicle started to decelerate while cars where flying on the interstate. The problem has not been fixed. The issue has been inspected by the manufacturer. There were no warnings or sighs before the care seized.
NHTSA complaint #11751461 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2014 Kia Optima. The contact stated that while driving 60 MPH, the vehicle unexpectedly stopped. There were no warning lights illuminated. The contact used a scanner and retrieved a code for failure with the knock sensor detection system and glow plug relay. The vehicle was towed to the local dealer, where it was diagnosed and determined that the engine had seized. The vehicle was not repaired. The manufacturer was contacted and opened a case. There was a question about the ownership of the vehicle. The warranty was denied because the vehicle was not being purchased from the dealer. The contact provided the title to show ownership. The failure mileage was approximately 167,000.
NHTSA complaint #11751073 — an unverified report by a vehicle owner.
ENGINE
On 7/13/26 around 0715 my son was driving our 2014 Kia optima when it caught fire and burned from the engine to the back of the car. Fire dept and law enforcement had to respond and the vehicle along with thousands of dollars of property was destroyed by the fire. This vehicle is a total loss and I’m trusting an investigation as to I believe their fire started due to the engjbe and electrical faults of Kia motors.
NHTSA complaint #11750155 — an unverified report by a vehicle owner.
ENGINE
The component that failed on my 2014 Kia Optima was the engine. Prior to the malfunction there were no lights indicating a failure. My safety was put at risk several times as my car had completely shut down on the highway going over 55 mph in way of many vehicles causing police to shut down the highway. I took the car to several auto shops to test and there was no indication of engine failure. I’ve got my battery checked, front end alignment and oil changed on schedule. The car still malfunctioned. I had it towed to the Kia dealership in March after learning about the recall on the engine. The dealership confirmed that the engine was faulty and had been recalled. There were several other recalls on that model as well. After keeping my car for a few days and charging me a service fee, they decided not to repair the engine saying that the software was not updated prior to the engine failure and they refused to repair. I was instructed to remove my car from the facility. I called their corporate office and a representative also denied my claim saying that the mileage on my car was too great. I have not been able to get in touch with anyone that can help. The car is located in a shared parking lot amongst hundreds of tenants and close to residential areas. I don’t believe it is a safe area if there is a fire risk but Kia refuses to honor their recall. The car is available for inspection upon request if needed.
NHTSA complaint #11745830 — an unverified report by a vehicle owner.
ENGINE
Engine seized up on the highway going onto incoming traffic. Almost got into a car accident.
NHTSA complaint #11745126 — an unverified report by a vehicle owner.
ENGINE AND ENGINE COOLING
The contact owns a 2014 Kia Optima. The contact stated that while driving at 15-20 MPH, the vehicle stalled after 7 months of ownership. The vehicle stalled in the intersection. A few guys were able to push the vehicle out of the roadway. No warning lights were illuminated. The contact received a recall notice for NHTSA Campaign Number: 17V224000 (Engine and Engine Cooling). The vehicle was towed to the local dealer, where it was diagnosed as having a locked-down motor. The vehicle was not repaired. The warranty was declined due to the prior service records. The contact mentioned a class action lawsuit. The manufacturer was contacted, who opened a case, but no additional assistance was provided. The failure mileage was approximately 141,000.
NHTSA complaint #11738606 — an unverified report by a vehicle owner.
ENGINE
The dealer stated my engine repair is not covered under the recall/warranty because an ECU software update was not performed. I was quoted $8500 for engine replacement (Long block). I have owned this vehicle for 2 months, going on 3. I am requesting a review of whether this vehicle qualifies for any engine recall or safety-related warranty coverage, as the explanation provided by the dealership appears inconsistent.
NHTSA complaint #11736377 — an unverified report by a vehicle owner.
ENGINE
The car is available upon inspection, the car caught on fire after being driven for about 45 mins. Smoke started to come from under the car hood, fire starting dropping from underneath the vehicle and then fire started coming from under the hood of the car. The car started smoking while being inside vehicle and the fire could've spread. The fire was put out by the fire department, the vehicle has not been inspected as of yet. No warning signs.
NHTSA complaint #11734586 — an unverified report by a vehicle owner.
ENGINE
My vehicle was having engine problems in 2024. It was towed to the dealership because it was a recall on it. The new engine is malfunctioning as well causing me to lose power while driving. I have only put 2,000 miles on the car since the engine was replaced.
NHTSA complaint #11732382 — an unverified report by a vehicle owner.
ENGINE
My vehicle was leaking oil an oil change. My vehicle started having a knocking sound. I am a single parent of a [XXX] child. The car would suddenly stop while I was driving which put me and my daughter's safety at risk. I took if to Southern Kia Greenbriar dealership to have a diagnostic test on Jan 17, 2026. [XXX] from the dealership confirmed my vehicle needs a new engine. It could be covered under the recall, however I would need to show receipts of every oil change from 2017 to 2026. The dealership has had my vehicle for over 2 1/2 months. My vehicle or component has been inspected by the Kia dealership, but not inspected by the police, insurance representatives or others. I noticed my oil on my drive way Jan 10th and put additional oil in my vehicle. Shortly after I began to noticed the car suddenly stopping for no reason, then heard a knocking sound when driving. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11729408 — an unverified report by a vehicle owner.
ENGINE
Issue: My 2014 Kia Optima has repeatedly experienced overheating, flashing check‑engine light, and loss of coolant. The dealership has misdiagnosed the issue multiple times and returned the vehicle to me in unsafe condition. Safety Concern: The vehicle overheats while driving, the check‑engine light flashes, and the engine loses power. This creates a serious risk of engine failure while on the road. I am concerned about potential engine damage, stalling, or fire risk due to overheating.
NHTSA complaint #11722633 — an unverified report by a vehicle owner.
ENGINE
While driving down the highway, my engine completely turned off. I was able to get to a safe location. When I tried turning the car back on, it would not turn back on. I took it to Kia, and they said I was covered under warranty due to their settlement. However, due to the salvage title of the car, they will not replace the engine, even though that is what their recall settlement covers.
NHTSA complaint #11720206 — an unverified report by a vehicle owner.
ENGINE
Motor blew going down the road.
NHTSA complaint #11710570 — an unverified report by a vehicle owner.
ENGINE
Check engine light was flashing and the car wouldn’t accelerate up to speed, wouldn’t turn over when tried to start.
NHTSA complaint #11708082 — an unverified report by a vehicle owner.
ENGINE
The engine failed after a prior engine replacement performed by the manufacturer. The failure caused the vehicle to become non-operational and created a risk of sudden loss of power and engine stalling while driving. The vehicle required towing and could not be safely driven. This is a repeat engine failure involving the same vehicle.
NHTSA complaint #11707345 — an unverified report by a vehicle owner.
ENGINE
My oil pressure sensor failed and is leaking oil into the electrical wire harness and all over the engine including intake and exhaust pipes which is a fire risk. It is the exact same issue as another recall affecting 2011 to 2014 kia models/years: 2019 safety recall (RCONL-19V101-0000) that involves replacing the oil pressure switch in certain 2011-2014 models if a leak is found. Additionally, a 2022 Technical Service Bulletin (MC-10210268-0001) extended the warranty for the oil pressure switch replacement to 15 years/150,000 miles for eligible vehicles. The recall addressed potential oil leaks, and the warranty extension covers the switch itself. 2019 safety recall (RCONL-19V101-0000) What it covered: The recall was for certain 2011-2014 Kia models and involved inspecting and potentially replacing the Oil Pressure Switch (OPS) and the oil pan if an oil leak was detected. Unfortunately at this time the dealership is claiming that this recall does not include my specific vehicle by Vin and I will have to cover the repair outside of warranty/recall to make the vehicle function properly/eliminate the oil leak/fire risk. It would be great if other kia optima owners could be protected and covered by the recall I mentioned above.
NHTSA complaint #11699235 — an unverified report by a vehicle owner.
ENGINE
My 2014 Kia Optima is burning oil heavily and emitting fumes into the cabin. The dealership confirmed an engine issue but said they are waiting on paperwork to replace the engine. I’ve been told to continue driving it even though the burning smell enters the car and causes headaches. I believe this is a safety hazard.
NHTSA complaint #11697323 — an unverified report by a vehicle owner.
ENGINE
The contact owned a 2014 Kia Optima. The contact stated that while driving at an undisclosed speed, the contact was flagged down by a nearby driver. The contact was informed that fire was coming from underneath the hood. In addition, the contact stated that several unknown warning lights were illuminated. The vehicle was driven to the shoulder of the road. The contact and the contact's dog exited the vehicle. No injuries were sustained. The fire department and Police were called to the scene. The fire department extinguished the fire. The vehicle was towed to the contact's residence. The fire report was unavailable. The vehicle had not been inspected. The contact had received a recall notification NHTSA Campaign Number: 21V331000 (Engine and Engine Cooling). The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 160,000.
NHTSA complaint #11688155 — an unverified report by a vehicle owner.
ENGINE
The contact owned a 2014 Kia Optima. The contact stated that after her daughter had parked the vehicle and shut off the engine, a fire had started under the hood as she exited. No warning lights illuminated. There was no odor or strange sound during the failure. The local fire department had arrived on scene to extinguish the fire. The local fire department deemed that the cause of the fire was started with the HECU. It was unknown if a Police report was filed. The vehicle was left at the contact's relative's residence, where it remains for further investigation. The vehicle was deemed a total loss since it was consumed by the fire. No injuries were sustained. No medical attention was sought. The local dealer was not contacted. The vehicle was not diagnosed. The manufacturer was not made aware of the failure. The failure mileage was approximately 185,000.
NHTSA complaint #11685734 — an unverified report by a vehicle owner.
ENGINE
While driving my 2014 Kia optima on the freeway the vehicle lost power completely and the car stopped almost causing me to be rear ended. I have reached out to Kia in Dublin since the vehicle should be covered under SC147 the vehicle has been at KIA since May and Kia is refusing to do repairs.
NHTSA complaint #11681060 — an unverified report by a vehicle owner.
ENGINE
While driving home one day, the engine shut off while in traffic. The engine light had started to blink right before. The battery, starter, and oil levels were fine. A mechanic later confirmed the engine was locked. I see there are articles stating there were engine recalls for 2011-2014 Kia optima’s, but my 2014 Kia Optima EX was denied. Please help. I love my Kia. Thanks.
NHTSA complaint #11675671 — an unverified report by a vehicle owner.
ENGINE
On 3 July 2025, while driving the car suddenly lost power and started smoking under the hood. I pulled over, exited the vehicle, and an engine fire started a minute later. The fire department put out the fire. The safety of myself and my child were at risk. We were driving at 40 miles per hour when the car lost power and caught fire. There were no warning lights. The car was towed to an independent repair shop to be evaluated, but results have not yet been gathered. There are known issues and recalls associated with 2014 Kia optima and with its engine losing power and catching fire, but my VIN was not included in the recalls when it should have been. This could have resulted in injury or the loss of life. At a minimum it has caused a loss of financial stability for my family due to Kia failing to produce and maintain safe vehicles.
NHTSA complaint #11671213 — an unverified report by a vehicle owner.
ENGINE
Heavy white/gray smoke on acceleration after driving for 30 min
NHTSA complaint #11670014 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2014 Kia Optima. The contact stated while driving 30 MPH, the contact heard a loud knocking sound coming from the engine compartment, with the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the engine had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was unavailable.
NHTSA complaint #11666295 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2014 Kia Optima. The contact stated that the vehicle was repaired under two unidentified NHTSA recalls; however, the recall repairs failed to prevent the failures from occurring. The contact stated that while driving at various speeds, the vehicle failed to a stop as intended. The contact stated that the brake pedal felt spongey and depressed to the floorboard. The check engine warning light was illuminated. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 80,000.
NHTSA complaint #11666347 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2014 Kia Optima. The contact stated after the vehicle was started and warmed up, the engine made an abnormal loud knocking sound. The vehicle was towed to Chavez Automotive, where it was diagnosed and determined that the engine had failed and needed to be replaced. The vehicle was not repaired due to the cost. Additionally, the dealer was contacted for the recall repair of NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic); however, the dealer informed the contact that the recall repair could not be performed due to the vehicle having a Salvage Title. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not notified of the failure. The failure mileage was approximately 65,000.
NHTSA complaint #11665157 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2014 Kia Optima. The contact received notification of NHTSA Campaign Number: 21V331000 (Service Brakes, Hydraulic); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that there was a burning odor coming from the engine compartment. The contact stated that while driving 5 - 10 MPH, the vehicle suddenly stalled and lost all power. The contact was unable to restart the vehicle. The ABS, check engine, and battery warning lights were illuminated. The vehicle was towed to the dealer. The manufacturer was made aware of the issue. The failure mileage was 133,000. Parts distribution disconnect.
NHTSA complaint #11659671 — an unverified report by a vehicle owner.
ENGINE
I was driving my 2014 Kia Ex and I heard a knocking noise, as I was driving my car stopped accelerating and went into limp mode. I took it to Kearny mesa kia and they told me it was the Knock sensor code P1326 I have looked and seen that there are plenty of recalls pertaining to this specific issue. Why are they telling me I have to pay for this when it is clearly something that is wrong with this on many vehicles across the board? I need my car fixed and back. Please help me.
NHTSA complaint #11656982 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2014 Kia Optima. The contact stated that while driving approximately 60 MPH, the vehicle suddenly stalled. The vehicle was towed to a certified mechanic to be diagnosed, and the contact was informed that the engine had failed and needed to be replaced. The dealer was contacted by the mechanic and the mechanic was advised that the vehicle should be taken to the dealer for assistance. The vehicle was towed to the dealer, who requested the oil change receipts before the contact could receive the engine replacement under the lifetime warranty. The contact was denied a rental by the dealer. The contact became aware that the engine was a rebuilt engine when the vehicle was purchased, which was not information that was provided at that time of purchase. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 119,000.
NHTSA complaint #11656036 — an unverified report by a vehicle owner.
ENGINE AND ENGINE COOLING
The contact owns a 2014 Kia Optima. The contact stated that the oil level was lower than expected. There was an unknown warning light illuminated. The vehicle vibrated while driving at various speeds. The vehicle was included in NHTSA Campaign Number: 17V224000 (Engine and Engine Cooling); and the engine was replaced under the recall in September 2020. The contact stated that 5 years after the recall repair was completed, after approximately one month, the brake failure warning light was illuminated. The vehicle was taken to a certified mechanic who added brake fluid to the brake reservoir, and the brake warning light illuminated approximately 2 weeks later and remained illuminated. The contact spoke with the dealer, who confirmed that the VIN was not included. The vehicle was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was 294,000.
NHTSA complaint #11654417 — an unverified report by a vehicle owner.