2018 Kia Optima
Problems, recalls and owner-reported issues
Engine is the leading concern among 232 owner complaints filed for this model year. This is the 8th highest complaint count among 20 Optima model years with reports.
Of the 2018 reports, 10 involved a crash and 10 involved a fire. 9 people were injured.
What owners report most often
Recalls and investigations
Latches/locks/linkages, trunk lid, latchAug 24, 2023
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 Motor Vehicle Safety Standard number 401, "Internal Trunk Release."
A person inside the trunk compartment may become trapped, increasing their risk of injury.
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.
Campaign 23V594000 on NHTSA.gov
Hybrid propulsion systemMar 8, 2018
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.
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.
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. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC162.
Campaign 18V161000 on NHTSA.gov
Representative owner complaints
232 reports, newest first.
Electrical system, Sep 17, 2021
Vehicle is making a noise when trying to accelerate. Have replaced all spark plugs and coil #4. It is making noise still and shaking. Coil has been switched and issues are reading fuel injector or air intake or electrical. Previous reading was head gasket... Only on spark plug 4 coil is it reporting an issue...All dealerships locally are booked to even get a diagnostic test.
Electrical system, Seat belts, Sep 5, 2021
While driving, car in motion, Front Passenger Seat belt Audio Warning Periodically goes off without reason. Indicating seat is occupied & seat belt needs putting on. When seat has been unoccupied / clear from any type of weight on seat to trigger sensor. Audio warning will continue until seat belt is latched over the empty seat. Local KIA Service Dept was informed & could neither confirm or deny its faulty behavior for it did not present itself during time of service. They said, wiring looked fine but did no further testing. To be honest they showed no interest into seeing any real importance for my concern for them to feel any further investigation was warranted. Its happened again twice since that service visit be it last incident Aug 7th. My concern is.... if there is faulty wiring or sensor signals being crossed somewhere, whats to say there is a passenger or no passenger in that seat, to ensure the correct signal is getting to the passenger side air bags of when to correctly deploy if an accident should happen with passenger in seat? This situ is only recent starting about a year a go. So something has changed from being fine for 2 yrs up to the last year that's now showing some kind of seat belt / sensor failure. I'm unfamiliar with how that wiring system works & linked within it for me know what other things I might need to pay more attn to, looking for other signs that could be saying is direct cause to the prob. Unsure if this a simple solution or is something that others are experiencing with this year & model car & poss be a Manufacturer Part Default
Engine, Aug 28, 2021
ENGINE LOSES COMPRESSION AND CAR DIES WHILE IN MOTION. THIS HAS HAPPENED SEVERAL TIMES AND IS EXTREMELY DANGEROUS ON THE ROAD! THIS CAR IS BARELY OUT OF WARRANTY WITH ONLY 104,000 MILES! THIS IS UNACCEPTABLE!
Other or unspecified, Aug 11, 2021
While driving at highway speed my children (11, 7, & 5) and I were almost rear-ended when my Kia Optima 2018 (79k) without ANY warning loses power, jerks and then regains power. A number of vehicles behind us had slam on their brakes to avoid a pileup. My Optima almost resembled the feeling when a vehicle runs out of gas but much more abrupt. The drink my son was holding was thrown out of hand due the vehicle jerking to an almost stop and jerking back to power. No warning light, battery & alternator both test good and tank was half full. Two days pass and the same system fail while driving with the same similarities (no warning lights). My Optima is no longer under warranty and I have no financial resources for repairs.
Exterior lighting, Aug 1, 2021
Driving at night, was getting onto the freeway. Entrance to the freeway was on a curved street, as I was taking the turn leading into the freeway the lights turned off, Then suddenly turned back on and then off again all while I was merging onto the freeway. I quickly took the light out of “AUTO” setting. Very scary as I almost got hit by the truckers already on the freeway. I’ve had issues with the blind spot warning as well. It fails all the time so of course I never put my trust on that. The lighting situation is very scary, as it was happening you could see the dashboard setting itself to AUTO and randomly going up and down the list of options as if it was being controlled by someone else. I could’ve caused an accident. Please check this issue.
Engine, Jul 13, 2021
Back in September of 2020, my car randomly went to limp mode while driving at highway speeds. Had the car towed to the dealer. Dealer advised of apparent “software issue” to correct the problem. Well this happened two more times after that twice the software was updated which didn’t work. The third time the replaced the knock sensor and so far I haven’t went to limp mode, however, the car has not drove the same and seems to get worse each passing day. Rough shifting, engine vibrates more than usual. Car struggles at times to go up hills, when giving gas a though way speed the car has a few second delay. Sometimes it feels as if the transmission is skipping. The car is up to date on all recommended services, I.e transmission flush and fill etc. There are also times when the vehicle is started but struggles. Almost as if it want to loose power but it doesn’t. Has happened numerous times however recently it actually didn’t start. Struggle to turn over a couple time but then finally did. A check engine light came on but then went away the next day after driving. I have an appointment with the dealer this week to look at this and other issues, again, hoping for some progress at that point.
Exterior lighting, Jun 5, 2021
Problems: lights switch is in auto position and I have locked the vehicle. I noticed at least twice the exterior lights come on and stays on until I unlock start the vehicle and turn engine off. Additionally on June 3 2021 light switch in automatic position coming home at night the head lights turned themselves off the dashboard lights remained on. I was a half mile from home and able to get the vehicle home safely. Turned the headlights switch to manual to turn lights back on.No warning lights came on. Mechanic will look at vehicle later this week. I have no confidence the mechanic will be a to replicate the problem. That's their if can't be reproduced or the computer did notice, it didn't happen .The vehicle is available for inspection
Power train, Engine, Fuel/propulsion system, May 14, 2021
WHEN DRIVING THIS VEHICLE RATTLES AND SHAKES IT HAS A BURNING SMELL/GAS SMELL. IT CUTS OFF WHILE DRIVING. LOOSES OIL.OIL AT LOW LEVEL BEFORE DUE. THIS MAKE AND MODEL IS NO LONGER BEING MANUFACTURED. IT HAS A KNOWN HISTORY OF ENGINE PROBLEMS. WHY WERE CONSUMERS ALLOWED TO BUY THIS CAR. PROBLEMS ARE ACTIVE AND ONGOING. STARTED ABOUT A YEAR OR CLOSE TO A YEAR AFTER PURCHASE. IT IS A LEMON . THE DEALER WANTS TO DIAGNOSE THE ENGINE, BUT THEY ALREADY KNOW THE ENGINE IS NO GOOD.
Structure, Apr 20, 2021
I WAS DRIVING ON THE FREEWAY AT ABOUT 60MPH AND SUDDENLY THE FRONT PART OF MY PANORAMIC SUNROOF EXPLODED. THERE WAS NO IMPACT OR ACCIDENT THAT CAUSED THIS. WE WEREN'T HIT BY ANY ROAD DEBRIS OR ANYTHING IT JUST EXPLODED WHILE DRIVING.
Engine, Apr 16, 2021
TL* THE CONTACT OWNS A 2018 KIA OPTIMA. THE CONTACT STATED WHILE DRIVING 75 MPH, THE VEHICLE ABRUPTLY STALLED. THE CONTACT STATED THAT THERE WAS NO WARNING LIGHT ILLUMINATED. THE CONTACT COASTED THE VEHICLE UNTO THE ROAD SHOULDER AND RESTARTED THE VEHICLE. THE VEHICLE OPERATED AS INTENDED. THE CONTACT STATED THAT THE VEHICLE WAS PREVIOUSLY TAKEN TO ANCIRA KIA (6139 BANDERA ROAD, SAN ANTONIO, TX 78238, (210)684-4000) DUE TO THE HESITATION AND STALLING. THE DEALER REPLACED THE SPARK PLUGS AND CHANGED THE OIL HOWEVER, THE REPAIR DID NOT CORRECT THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 17V224000 (ENGINE AND ENGINE COOLING). THE FAILURE MILEAGE WAS 72,800.
Engine, Mar 2, 2021
I ORIGINALLY LEASED MY 2018 OPTIMA WITH 98 MILES ON IT AND BOUGHT IT OUT AT THE END OF MY LEASE THIS WAS MY SECOND OPTIMA, I ALSO HAD 2 HYUNDAI SONATAS. SINCE I'M IN SALES I HAD THE ADDED MILEAGE ON IT. AT 98,000 MILES THE ENGINE STARTED TICKING. I ORIGINALLY HAD A 2013 HYUNDAI SONATA THAT WHEN IT HIT 105,000 STARTED TICKING ONLY TO FIND THAT IT WAS BURNING OIL (1.5 QUARTS A WEEK) SO I WAS HESITANT ABOUT ANOTHER KIA BUT THE DEALER ASSURED ME THAT KIA HAD BEEN AWARE OF THE PROBLEM AND THAT THEY HAD FIXED IT. GUESS WHAT?! IT HASN'T. I TOOK MY VEHICLE IN EVERY 1,000 MILES FOR OIL CHANGE AND HAVE THE DOCUMENTS SHOWING HOW MUCH OIL WAS BEING BURNED OFF. ACCORDING TO KIA CORPORATE THERE IS NOTHING WRONG EVEN THOUGH MY VEHICLE REQUIRES A QUART OF OIL EVERY 1,000 MILES AND WAS UNDER OWNERS WARRANTY. NEVER AGAIN. PEOPLE WATCH YOUR VEHICLES. THIS IS A KNOW PROBLEM WITH KIA AND HYUNDAI AND THEY DO NOT HONOR THEIR WARRANTIES.
Other or unspecified, Mar 1, 2021
BOTH OF MY BACK DOOR SENSATORS ARE SAYING THE BACK DOORS ARE OPEN BUT THEY'RE LOCKED
Service brakes, Engine, Jan 30, 2021
LOUD RATTELING WHEN CRANKING, CONTINUOUS RATTELING WHEN ACCELERATING UNDER DRIVERSIDE FLOOR BOARD MADE A CLUNK SOUND WHEN APPLYING BRAKES AND NOW ITS LIKE A SLIDING SOUND BEFORE IT CATCHES BRAKE
Steering, Jan 12, 2021
TL* THE CONTACT OWNS A 2018 KIA OPTIMA. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE POWER STEERING LOCKED IN MID TURN WITH THE POWER STEERING WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT CALLED PERRIS VALLEY KIA (707 E 4TH ST, PERRIS, CA 92570) AND WAS INFORMED THAT THE ONLY WAY TO REPAIR THE DEFECT WAS TO DUPLICATE THE FAILURE. THE CONTACT WAS ADVISED TO LEAVE THE VEHICLE WITH THE DEALER FOR AN EXTENDED PERIOD. THE CONTACT DECLINED THE OFFER. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 35,000.
Steering, Electrical system, Service brakes, Dec 12, 2020
I HAVE 63,826 MILES ON MY 2018 KIA OPTIMA S AND I DROVE IT TO THE STORE AND ALL MY LIGHT ON THE DASH CAME ON WHEN I WOULD COME TO A STOP AND MY POWER STEERING WOULD GO OUT AND ABOUT CAUSE ME TO WRECK. I WAS TOLD THAT IT WAS MY ALTERNATOR BUT AFTER GETTING A NEW ALTERNATOR I THEN DROVE IT TO GET DINNER A FEW DAYS LATER WHEN THE SAME THING STARTED HAPPENING AGAIN AND MY POWER STEERING KEPT GOING OUT AGAIN. I HAVE TWO NEWBORN BABIES, A 5 YEAR OLD AND A 10 YEAR OLD IN THE VEHICLE WITH ME AND HAD I WRECKED WHEN THE POWER STEERING WENT OUT IT COULD HAVE BEEN A BAD SITUATION.
Air bags, Seat belts, Nov 25, 2020, crash
I WAS IN A CAR ACCIDENT AS I WAS DRIVING ON I65 AND MY AIR BAGS DID NOT DEPLOY AND MY SEAT BELT DIDN'T LOCK UP
Power train, Nov 11, 2020
THIS ISSUE HAS HAPPENED MULTIPLE TIMES TO NOT ONLY MYSELF. IT MY WIFE AS WELL. AS WE'RE DRIVING ANYWHERE ABOVE 45MPH. A WARNING DISPLAY COMES ON TELLING US TO CHECK THE HEV, TO PULL OVER, AND TURN OFF OUR VEHICLE. WE COMPLY TO THE WARNING AND WHEN RESTARTING THE VEHICLE, CHECK ENGINE LIGHT COMES ON AND THEN SAME ISSUE HAPPENS AGAIN A FEW MINUTES AFTER DRIVING. ONE OUT OF THE FOUR TIMES THAT THIS ISSUE HAS OCCURED TO US, THE VEHICLE COMPLETELY DIED ON MY WIFE DUE TO THE BATTERY NOT CHARGING. SO WHEN SHE PULLED OVER AND TRIED TO TURN THE VEHICLE BACK ON, IT WOULDN'T RESTART. CODE ON CAR IS P2600 GENERIC COOLANT PUMP CIRCUIT A OPEN. EVERYWHERE SAYS RECALL ISN'T AVAILABLE FOR OUR CAR BUT AM SEEING THAT SAME ISSUE WITH OUR YEAR, MAKE, AND MODEL IS OCCURRING. WHICH IS THE HYBRID PROPULSION SYSTEM IS BEING AFFECTED. THE VOLTAGE PROTECTION DEVICE (VPD), DESIGNED TO PROTECT THE HIGH VOLTAGE BATTERY MODULE IS BEING ACTIVATED INADVERTENTLY.
Tires, Nov 8, 2020
ON NOVEMBER 7 WHILE DRIVING ON A FREEWAY IN SC I HAD A CATOSTROPHIC FAILURE IN MY FRONT LEFT TIRE AT 55 MILES PER HOUR. FORTUNATELY I WAS ABLE TO EXIT SAFELY AND GET MY VEHICLE OFF THE ROAD. THE TIRE WAS FILLED TO MANUFACTURER PSI AND WAS DRIVEN ONLY 13,151 MILES. THE SIDEWALL WAS BLOWN OUT. I DID NOT HIT ANYTHING TO CAUSE THIS FAILURE THE TIRE IS A KUMHO 215 R17 94 V. MY VEHICLE IS A 2018 KIA OPTIMA S. I BELIEVE I SHOULD HAVE A FULL REPLACEMENT FOR THIS FAILURE.
Electrical system, Other or unspecified, Oct 22, 2020
2018 KIA OPTIMA EX. SOMETIMES HESITATES WHEN TRYING TO START, UNTIL TODAY. ALL LIGHTS ON DASH LIT UP BUT NO IGNITION. I TRIED SEVERAL TIMES, THEN STEERING AND BRAKE PEDAL LOCKED UP AND I HEARD CLICKING NOISE. HAD SOMEONE JUMP MY BATTERY AND THE CAR STARTED UP, BUT WHEN I TURNED IT OFF, IT WOULD NOT START AGAIN. NOTHING WAS LEFT ON ALL NIGHT, CAR WAS LOCKED AND UNLOCKED WITH HANDLE. I AM CONTACTING THE DEALER THIS AFTERNOON TO SEE HOW THEY HANDLE THIS.
Electrical system, Oct 20, 2020
MY CAR SUDDENLY EXPERIENCE MAJOR ELECTRICAL ISSUES. I DROVE MY CAR TO THE STORE AND BACK HOME. I WENT BACK TO MY CAR AND IT STARTED WITH NO PROBLEM BUT MY DASH WAS FLASHING, MY BRAKE, STEERING, CHECK ENGINE, AIRBAG, ABS, AND TRACTION'S CONTROL INDICATORS CAME ON ALL AT ONCE. I WAS NOT ABLE TO SHIFT THE CAR INTO GEAR. I USED THE PARK RELEASE SHIFT TO PUT THE CAR IN GEAR AND THE CAR HAS NO POWER STEERING. BUT IT MOVES. I TOOK IT TO THE JEFFERY KIA IN ROSEVILLE,MI AND BASICALLY WAS TOLD THAT THEY DIDN'T KNOW WHAT WAS WRONG WITH CAR. THEY ASK ME HAD MY CAR BEEN STRUCK BY LIGHTNING! YOU CAN LOOK AT THE CAR AND SEE THERE HAS BEEN NO ACCIDENTS OR LIGHTNING STRIKES TO THE CAR. THEY WANTED TO CHARGE ME EXTRA MONEY TO KEEP THE CAR JUST TO TELL ME WHAT'S WRONG WITH IT. I KNOW THIS IS A DEFECT WITH THIS VEHICLE. I SEE THE EPD RECALL ON 2018 KIA OPTIMA BUT THEY ARE SAYING IT'S ONLY FOR HYBRIDS. WHICH IS FALSE THIS HAS TO BE HAPPENING TO ALL THE KIA OPTIMA MODELS.
Other or unspecified, Sep 22, 2020
WHEN DRIVING AT NIGHT THE LIGHTS WILL CUT COMPLETELY OFF. YOU HAVE TO SWITCH FROM AUTO TO THE ON POISTION. ITS A VERY SCARY AND DANGEROUS SITUATION.
Electronic stability control (ESC), Service brakes, Sep 22, 2020
WHEN I GO TO ACCELERATE FROM A STOPPED POSITION; THE CAR STALLS AND TURNS OFF AND THEN IT TURNS ITSELF BACK ON. ADDITIONALLY, WHEN I DRIVE OVER 50 MPH THE CAR/TIRES START TO VIBRATE.
Air bags, Engine, Sep 3, 2020, fire
TL* THE CONTACT OWNS A 2018 KIA OPTIMA HYBRID. THE CONTACT STATED THAT WHILE DRIVING THE VEHICLE STARTED TO MAKE AN UNKNOWN NOISE, THE CONTACT COSTED TO THE SIDE OF THE ROAD AND CHECK UNDERNEATH AND AROUND THE VEHICLE TO SEE WHERE THE NOISE WAS COMING FROM BUT DID NOT FIND ANYTHING. THE CONTACT STATED THAT THE AIR BAG WARNING LIGHT ILLUMINATED. THE VEHICLE STATED THAT SHE WAS ON A WAY TO TAKEN THE VEHICLE FOR AN OIL CHANGE. THE TECHNICIAN HEARD THE NOSE AND INFORMED THE CONTACT THAT HE WAS WOULD NEED TO CHECK EVERYTHING BEFORE HE CAN COMPLETE AN OIL CHANGE. THE TECHNICIAN REMOVED THE PROTECTIVE SHIELD UNDERNEATH THE VEHICLE AND NOTICED OIL WAS ALL OVER AND METAL SHAVING WAS IN THE OIL AROUND THE OIL PRESSURE SENSOR. THE TECHNICIAN INFORMED THE CONTACT IT MAYBE WAS COMING FROM THE ENGINE. THE CONTACT CALLED NAPLETON'S MID RIVERS KIA, 4955 VETERANS MEMORIAL PKWY, ST PETERS, MO 63376, AND INFORMED THEM OF THE FAILURE AND THE CONTACT WAS INFORMED TO SCHEDULE AND APPOINTMENT. THE CONTACT STATED THAT SHE HAD THE VEHICLE TOWED TO AUFFENBERG HYUNDAI, 1300 CENTRAL PARK DR, O'FALLON, IL 62269, AND THE TECHNICIAN COULD NOT FIND A FAILURE. THE CONTACT WAS INFORMED THAT THE MANUFACTURER WOULD SEND AND ENGINEER TO INSPECT THE VEHICLE. THE VEHICLE WAS NOT REPAIRED YET. THE CONTACT MENTIONED THAT SHE WAS EXPERIENCING ELECTRIC SHACK FROM THE STEERING WHEEL AND THE ACCELERATOR PEDAL. AND THAT THE ACCELERATOR WAS LOSING PRESSURE AND THAT SMOKE WAS COMING THROUGH THE VENT OF THE CABIN. THE FAILURE MILEAGE WAS APPROXIMATELY 27,573.
Other or unspecified, Sep 2, 2020
FIRST OFF MY CAR IS FINE. AGAIN MY CAR IS FINE NO COMPLAINTS. NHTSA HAS MISS IDENTIFIED MY 2018 OPTIMA LX WITH 2.4L ENGINE HYBRID. NHTSA WITH THIS SCREW UP HAS OHIO BMV THINKING MY CAR IS HYBRID AND WANTS AN EXTRA $100 DOLLARS AS A FEE FOR LICENSE BECAUSE THEY THINK IT IS ELECTRIC. OHIO BMV OR APPARENTLY NHTSA DOSE NOT HAVE A PROCESS TO FIX THE PROBLEM OR FIGURE OUT MY CAR IS GASOLINE ONLY. OHIO BMV WILL WILL ONLY GO ON WHAT NHTSA WEB SITE SAYS. IT APPARENTLY SAYS MY CAR COULD BE A HYBRID. AS I SAY NO PROBLEM WITH CAR BUT NHTSA HAS MISS CODED WHAT MY CAR IS. HAVE NOT BEEN ABLE TO GET ANY HELP FROM KIA YET.
Engine, Aug 24, 2020, fire
CAUGHT FIRE WHILE DRIVING.