Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2014 Kia Optima owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owned a 2014 Kia Optima. The contact stated that while the husband was driving the vehicle a ticking noise was present coming from the engine compartment before suddenly smoke began to come from under the hood of the vehicle. The husband exited the vehicle and moments later flames were seen coming from under the hood. The fire department was called to the scene and extinguished the flames. A police and fire report was taken at the scene and the vehicle was towed away. During the incident, the vehicle was destroyed. The cause of the failure was not determined. The manufacturer and local dealer were notified of the failure. The contact indicated that prior to the incident occurring the vehicle had been serviced for a recall related to an engine failure and fire but the failure still occurred. No further information was available. The failure mileage was 144,000.
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.
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.
The contact owned a 2014 Kia Optima. The contact stated that while driving at an undisclosed speed, there was a burning fume in the interior of the vehicle. The contact parked the vehicle and the flames were coming from under the hood. The contact safely exited the vehicle. The fire department and the police were on the scene. The fire department extinguished the fire. A fire report was filed. No police report was filed. There were no injuries sustained. The contact stated that the vehicle was scheduled to be towed to a local tow yard. The contact stated that the vehicle had been serviced for an oil change one week before the failure occurred The manufacturer was not made aware of the failure. The failure mileage was approximately 167,000.
The contact owns a 2014 Kia Optima. The contact stated while driving 65 MPH, there was grayish smoke coming from the engine. The vehicle stalled with several unknown warning lights illuminated on the instrument panel. The contact was able to steer the vehicle off to the shoulder of the highway and had the vehicle towed to an independent mechanic. The independent mechanic diagnosed the vehicle with engine failure. The vehicle was then towed to a dealer where they also diagnosed the vehicle with engine failure and stated that the vehicle was not under recall. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 96,000.
The contact owns a 2014 Kia Optima. The contact stated that while driving approximately 35 mph the vehicle shut off and rolled in a parking lot. There were no warning lights illuminated. Additionally, the dashboard and vents melted and the air conditioner became inoperable. The vehicle was taken to an independent mechanic where it was informed there were metal shavings in the engine. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted who referred the contact to a local dealer. The failure mileage was approximately 129,000.
The contact owns a 2014 Kia Optima. The contact stated while stopped at a light, she saw smoke coming from the front of the vehicle when the vehicle started to spark and then caught fire. No warning lights illuminated. The origin of the fire was unknown. The fire department was able to extinguish the fire. The vehicle was towed to an independent mechanic where it had not yet been diagnosed. A police report was filed. No injuries were sustained. The dealer was not notified of the failure. The manufacturer was not notified of the failure. The approximate failure mileage was 146,000
The contact owns a 2014 Kia Optima. The contact stated while driving 40 MPH, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle failed to restart. The contact also stated that the failure had occurred several days earlier, but the vehicle was able to restart. The check engine warning light was illuminated. The vehicle was towed to an independent mechanic, who diagnosed a failure with the camshaft sensor. The vehicle was not repaired. The vehicle was towed to another independent mechanic, who additionally determined that the engine had seized due to abnormal bearing wear, resulting in irreparable engine damage. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. …
The contact owns a 2014 Kia Optima. The contact stated while driving approximately 2 MPH, after having stopped at a traffic signal, the contact heard a clicking noise coming from the engine compartment. The contact stated that the vehicle stalled with several unknown warning lights flashing. The contact was able to restart the vehicle after having a passerby jump start her vehicle. The contact was able to drive the vehicle to an independent mechanic. The mechanic diagnosed the vehicle and determined that the cam shaft had failed, and the vehicle was low on oil. The contact stated that the mechanic added oil and started the vehicle for a test drive. The contact stated that the engine seized while on the test drive. The independent mechanic researched online and related the failure to NHTSA Campaign: 17V224000 (Engine and Engine Cooling). The vehicle had not been repaired. …
The contact's stepdaughter owns a 2014 Kia Optima. The contact stated while his stepdaughter was driving approximately 45 mph, the vehicle began to stall and she started to hear an abnormal sound. The contact stated that there was no warning light illuminated. The driver parked on the side of the road until the contact drove to her location. The contact towed the vehicle to an independent mechanic, where it was diagnosed with needing the engine to be replaced. The vehicle was included in NHTSA Campaign Number: 17V224000 (Engine and Engine Cooling) and 20V519000 (Service Brakes, Hydraulic) which was related to the failure. The contact called the local dealer and was informed that since she was not the first owner of the vehicle, the recall repairs would not be honored. The vehicle was not diagnosed nor repaired. …
Related recalls
Engine
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.
Remedy: 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.
Engine and engine cooling › Engine
Kia Motor Company (Kia) is recalling certain 2011-2014 Optima, 2012-2014 Sorento and 2011-2013 Sportage vehicles. Machining errors during the engine manufacturing process may cause premature bearing wear within the engine.
Remedy: Kia will notify owners, and dealers will inspect the engine assembly, and replace the engine if necessary, free of charge. The recall began June 20, 2017. Owners may contact Kia customer service at 1-800-333-4542.
NHTSA investigations
Scope and Timeliness
NHTSA opened Recall Query (RQ) 17-003 to investigate the timeliness and scope of Kia?s Theta II GDI engine recall (Recall No. 17V-224), and Kia?s compliance with reporting requirements. On November 23, 2020, the Agency entered into a Consent Order with Kia to administratively resolve NHTSA?s assertions of violations of law in connection with RQ17-003.
Engine Fires
On March 29, 2019, the Office of Defects Investigation (ODI) opened two Preliminary Evaluations (PE19-003 on Hyundai and PE19-004 on Kia) to broadly investigate incidents of non-crash fires (regardless of origin or operational status of the vehicle) on various model year Hyundai and Kia vehicles.
Loss of Motive Power
The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021.
Engine complaints in other Optima years
Frequently asked questions
How common are engine problems on the 2014 Kia Optima?
NHTSA has 299 complaints about the engine & cooling of the 2014 Kia Optima, 51% of the model year's 590 complaints. The component named most often is exhaust system (1 mentions).
Is there a recall for 2014 Kia Optima engine problems?
Yes — NHTSA recall 18V-907 (engine, Dec 19, 2018); NHTSA recall 17V-224 (engine, Mar 31, 2017). Recall repairs are free at authorized dealers.
At what mileage do 2014 Kia Optima engine problems start?
Half of the complaints with a recorded mileage happened before about 88,000 miles, and 12% before 25,000 miles.
Is it dangerous?
Owners linked 8 crashes, 30 fires and 10 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.