Head-to-head reliability
KIA Optima vs KIA Sorento
How the KIA Optima and KIA Sorento compare on NHTSA complaints, recalls and crash reports — and which is the lower-risk used buy.
Based on NHTSA owner-complaint & recall records
KIA Optima vs KIA Sorento: The Optima has 599.4 complaints per year, with 51% engine-related, while the Sorento averages 566.9 complaints per year, with more electrical issues. Both have serious engine failure risks, but the Sorento also suffers from unpredictable electrical gremlins. Source: NHTSA owner complaints.
The picture
Is the KIA Optima or KIA Sorento more reliable?
A plain-English read on what the NHTSA record says about living with each vehicle.
KIA Optima
The KIA Optima, a midsize sedan, shows a heavy concentration of engine complaints—over half of all reports—with owners describing sudden oil consumption, loss of power, and catastrophic failure even with regular maintenance. Electrical system and steering issues also appear frequently, and the vehicle has 41 recalls covering systems like automatic emergency braking and fuel lines. Living with an Optima means staying vigilant about oil levels and being prepared for potential engine or transmission problems after software updates.
KIA Sorento
The KIA Sorento, a midsize SUV, also has engine problems as its top complaint area, but with a lower proportion than the Optima. Owners report stalling, check engine lights, and timing chain failures, alongside notable electrical gremlins like random door locking, dome lights, and stalling when using accessories. Structure complaints include a chrome bezel causing blinding glare, and the vehicle has 45 recalls, many for electrical system and brake light switch issues. The Sorento's reliability picture is marred by unpredictable electrical faults and engine concerns.
The numbers
Side-by-side NHTSA record
Lower is better in every category. The highlighted cell is the stronger result.
| Category | KIA Optima | KIA Sorento |
|---|---|---|
| Total complaintsAll model years combined | 5,994 | 5,669 Better |
| Safety recallsFederal recall campaigns | 41 Better | 45 |
| Crash reportsCrash-related complaints | 210 | 150 Better |
| Complaints per yearAveraged across model years | 599.4 | 566.9 Better |
| Reported injuriesTied to owner complaints | 186 Better | 192 |
| Reported deathsTied to owner complaints | 9 | 4 Better |
Source: NHTSA owner complaints & recall records.
What actually goes wrong
The problems owners report
The most-complained-about systems on each vehicle — what fails, and what owners say in their own words.
KIA Optima
- 01ENGINE3,031
- 02UNKNOWN OR OTHER774
- 03STEERING712
- 04ELECTRICAL SYSTEM709
- 05SERVICE BRAKES448
Owners report sudden oil consumption (2 quarts per 1,000 miles), loss of power, knocking sounds, and engine failure even with regular oil changes. The engine can seize without warning, leaving the car undriveable.
Complaints describe severe oil consumption leading to engine rattling and smoke, as well as transmission hard-shifting after a recall software update, causing jerky gear changes.
Electrical issues often accompany engine problems, with owners reporting that dealerships refuse warranty claims despite repeated visits for oil consumption and check engine lights.
“Out of town July 12th 2025 my 2020 Kia Optima engine started having problems. I tried to get to my hotel but it was obvious I was not going to make it. I pulled into the nearest station and was told my car had no oil. There were no signs of leaking oil and no…”
“I have kept up on regular oil changes and maintenance on my Kia which I bought new 5 years ago. My issues started when my car's orange check engine light came on, I experienced loss of power such as difficulty accelerating even at low speeds, especially up hi…”
KIA Sorento
- 01ENGINE2,076
- 02ELECTRICAL SYSTEM838
- 03UNKNOWN OR OTHER682
- 04STRUCTURE580
- 05POWER TRAIN561
Owners report stalling while driving, persistent check engine lights with undiagnosable codes, and timing chain failures requiring replacement. Some vehicles cut off and catch fire.
Electrical gremlins include doors relocking on their own, dome lights coming on, back hatch unlocking spontaneously, and stalling when using wipers or radio. Dashboard lights may illuminate simultaneously.
The chrome bezel on the instrument panel reflects sunlight and streetlights intensely, causing temporary blinding flashes—a safety hazard while driving.
“The contact owns a 2009 Kia Sorento. The contact stated while driving out of the driveway, the warning message "ASC-OFF" appeared on the instrument panel and the vehicle inadvertently stalled. The contact stated as she turned off the vehicle, she was able to…”
“My check engine light is on. It has been on for over 2 or more years. Nobody knows what the codes mean. My timing chain needs to be replaced. My tires are constantly leaking. My battery has been replaced 2 times, and I still cannot start my vehicle even when…”
Official recalls
Safety recalls on record
Federal recall campaigns — the defect, the risk, and the fix. Confirm any open recall was completed before you buy.
KIA Optima — 41 recalls
The defect: Kia Motors America (Kia) is recalling certain 2019 Optima vehicles equipped with Gamma 1.6L Turbo-GDI or Theta II 2.0L Turbo-GDI engines. A software error in the Forward Collision-Avoidance Assist (FCA) system may cause the braking assist function to not engage when a stationary vehicle is detected.
The risk: Improper intervention of the Forward Collision-Avoidance Assist can increase the risk of a crash.
The fix: Kia will notify owners, and dealers will update the FCA software, free of charge. The recall began August 27, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC179.
The defect: Kia Motors America (Kia) is recalling certain 2017-2018 Kia Optima hybrid vehicles. These vehicles are equipped with a Voltage Protection Device (VPD), designed to protect the high voltage battery module, that may activate inadvertently.
The risk: If the VPD activates while the vehicle is being operated in Electric Vehicle (EV) mode, there may be a loss of power, increasing the risk of a crash.
The fix: Kia will notify owners, and dealers will remove the VPD switch and install two newly designed Battery Management Systems (BMS) that contain Overvoltage Protection Devices (OPDs), free of charge. The recall is expected to begin May 2018. Ow…
The defect: Kia America, Inc. (Kia) is recalling certain 2016-2017 Rio, 2016-2018 Optima, 2017-2018 Optima Hybrid and Optima Plug-in Hybrid vehicles. The trunk latch base may crack, preventing the opening of the trunk from the inside. As such, these vehicles fail to comply with the requirements of Federal Moto…
The risk: A person inside the trunk compartment may become trapped, increasing their risk of injury.
The fix: Dealers will replace the trunk latch base subassembly, free of charge. Owner notification letters were mailed October 19, 2023. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC278.
The defect: 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 pi…
The risk: A fuel leak in the presence of an ignition source can increase the risk of a fire.
The fix: 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.
KIA Sorento — 45 recalls
The defect: Kia Motors America (Kia) is recalling certain 2006-2010 Sedona and 2007-2009 Sorento vehicles. Moisture may enter the Anti-lock Brake (ABS) Module and result in an electrical short.
The risk: An electrical short within the ABS Module may cause an engine compartment fire, even when the vehicle is turned off, increasing the risk of an injury.
The fix: Kia will notify owners, and dealers will install a relay in the main junction box to prevent power from being directed to the HECU when the vehicle's ignition switch is turned off, free of charge. The recall began June 5, 2020. Owners may…
The defect: Kia Motors Corporation (Kia) is recalling certain model year 2007-2010 Rondo, model year 2007-2011 Sedona, Sorento and Sportage, model year 2010-2011 Soul, model year 2008-2011 Optima, model year 2010 Forte, model year 2007-2009 Amanti, and model year 2009 Borrego vehicles. Originally, in April 201…
The risk: Failure to illuminate the stop lamps during braking or inability to disengage the cruise control could increase the risk of a crash. Additionally, when the ignition is in the 'ON' position, the transmission shifter may be able to be moved…
The fix: Kia will send an interim notification to owners in May 2013. When parts are available, owners will receive a second notification and dealers will replace the stop lamp switch, free of charge. Owners may contact Kia at 1-800-333-4542. Kia's…
The defect: Kia Motors Corporation (Kia) is recalling certain model year 2007-2010 Rondo, model year 2007-2011 Sedona, Sorento and Sportage, model year 2010-2011 Soul, model year 2008-2011 Optima, model year 2010 Forte, model year 2007-2009 Amanti, and model year 2009 Borrego vehicles. Originally, in April 201…
The risk: Failure to illuminate the stop lamps during braking or inability to disengage the cruise control could increase the risk of a crash. Additionally, when the ignition is in the 'ON' position, the transmission shifter may be able to be moved…
The fix: Kia will send an interim notification to owners in May 2013. When parts are available, owners will receive a second notification and dealers will replace the stop lamp switch, free of charge. Owners may contact Kia at 1-800-333-4542. Kia's…
The defect: KIA IS RECALLING CERTAIN MODEL YEAR 2007-2008 SORENTO PASSENGER CARS MANUFACTURED FROM JUNE 15, 2006 THROUGH NOVEMBER 27, 2007. THE FRONT PASSENGER AIR BAG MAY BE TURNED OFF WHEN AN ADULT IS IN THE PASSENGER SEAT. THE FRONT PASSENGER AIR BAG IS DESIGNED TO BE TURNED OFF IN LIMITED CIRCUMSTANCES INC…
The risk: THE PASSENGER SIDE AIR BAG IS TURNED OFF WHEN THE OCS MISCLASSIFIES AN ADULT PASSENGER. WITH THE FRONT PASSENGER AIRBAG OFF, THE FRONT PASSENGER WILL NOT HAVE THE PROTECTION OF THE PASSENGER AIR BAGS IN SOME FRONTAL COLLISIONS, THUS INCREA…
The fix: KIA WILL UPDATE THE PROGRAMMING IN THE SORENTO OCS CONTROL MODULE AT NO CHARGE. THE RECALL REMEDY IS CURRENTLY AVAILABLE UNDER SERVICE CAMPAIGN SC076. OWNERS MAY CONTACT KIA CUSTOMER SERVICE AT 1-800-333-4542.
Buyer analysis
KIA Optima or KIA Sorento: which should you buy?
The KIA Optima averages 599.4 complaints per year, slightly higher than the Sorento's 566.9, but the Optima's engine issues are more dominant and severe. In practice, the Sorento's electrical unpredictability may be more frustrating day-to-day, while the Optima poses a higher risk of sudden engine failure.
Key differences
- Optima has a higher proportion of engine complaints (51% vs 37% for Sorento), with owners reporting sudden oil loss and engine seizure.
- Sorento has more electrical system complaints (15% vs 12%), including random door locking and stalling when using accessories.
- Sorento has a unique structure complaint about a chrome bezel causing blinding glare, not reported on the Optima.
- Optima has 41 recalls vs Sorento's 45, but Sorento's recalls include multiple brake light switch issues.
- Check engine oil level and look for signs of consumption; ask for service records showing oil changes every 3,000-5,000 miles.
- Test drive for hesitation or loss of power, especially uphill, and listen for knocking or rattling from the engine.
- Test all electrical accessories: operate wipers, radio, lights, and locks while driving to check for stalling or erratic behavior.
- Inspect the instrument panel chrome bezel for glare; sit in the driver's seat at different times of day to assess visibility.
Before you buy
- Obtain a vehicle history report to check for open recalls and prior engine or electrical repairs.
- Have a mechanic perform a compression test and oil consumption check on the engine.
- For the Sorento, test the brake light switch function and check for any electrical system DTCs.
- Drive both vehicles at highway speeds and in stop-and-go traffic to feel for transmission harshness or stalling.
- Review NHTSA complaint details for the specific model year you're considering.
Year by year
Which model years to avoid
Complaints per model year for both vehicles — lower is better. The spikes are the years to scrutinize.
| Year | KIA Optima | KIA Sorento |
|---|---|---|
| 2017 | 250 | 783 |
| 2014 | 574 | 973 |
| 2013 | 1369 | 976 |
| 2012 | 915 | 874 |
| 2011 | 589 | 1515 |
Check the actual car
Comparing models is smart. Checking the VIN is essential.
Brand averages tell you the trend. A VIN check tells you what's wrong with the specific KIA Optima or KIA Sorento in front of you — accident history, open recalls and title records.
Go deeper
Full reliability reports
- Comparison
- KIA Optima vs KIA Sorento
- KIA Optima total complaints
- 5,994
- KIA Sorento total complaints
- 5,669
- KIA Optima total recalls
- 41
- KIA Sorento total recalls
- 45
- KIA Optima avg complaints/year
- 599.4
- KIA Sorento avg complaints/year
- 566.9
- More reliable overall
- KIA Sorento
- KIA Optima top complaint area
- ENGINE
- KIA Sorento top complaint area
- ENGINE