2018 Kia Optima Power Train
Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.
Complaint Timeline
Chronological view of owner reports
It burns oil constantly. I constantly have to get new filters put on because they become black very quickly same with the oil itself. The engine has a tic and I know other people with optima’s that have the same problem. I burn through 4 quarts in two weeks- less than 600 miles.
The contact owns a 2018 Kia Optima. The contact stated that while driving at an undisclosed speed, the vehicle was jerking. The vehicle was taken to the dealer; however, no cause for the failure was found. The vehicle was then taken to Battleground Kia of Greensboro (2927 Battleground Ave, Greensboro, NC 27408) but no cause for the failure was found. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 60,000.
UNKNOWN When slowing to a stop, the vehicle spontaneously makes a sudden jolt, throwing passengers forward. It’s as if the the transmission malfunctions when down shifting and results in engine braking.
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.
THE CV AXLE ASSEMBLIES SNAP LIKE THE 2016 MODELS DO KIA'S RECALL NUMBER SC139.
2018 KIA 12,000 MILES HAD RECALL 2 MONTHS AGO FOR SOFTWARE UPDATE AS I WAS DRIVING TO WORK ONE DAY GETTING ON INTERSTATE IN RUSH HOUR TRAFFIC MY SPEED AT TIME WAS PROBABLY 60 MPH CANT PUSH THE GAS CAR JUST STALLS 18 WHEELER BEHIND BLOWING HORN I PULL CAR TO SIDE OF INTERSTATE GOT CAR TO CLOSEST KIA DEALERSHIP I ASK WHAT WAS WRONG AND THEY STATED THEY USE TO REPLACE THE MOTOR BUT NOW THEY JUST PUT A PART CALLED A HARNESS ON IT PART WAS NOT IN THEY HAVE TO KEEP CAR SEVERAL DAYS
TRANSMISSION FAILED AFTER 4 MONTHS AND 3800 MILES WHILE DRIVING ST LOCAL STREETS, KIA DEALERS REFUSED TO REPAIR UNDER WARRANTY.
SATURDAY, JANUARY 20, 18:55(APPROXIMATELY) AMHERST MASSACHUSETTS, 39 DEGREES FAHRENHEIT PARKED CAR, PULLED KEYS AND EXITED CAR TO HELP MY MOTHER EXIT. PARKED ON INCLINE, VEHICLE STARTED ROLLING BACK DOWN DRIVEWAY HAD KEYS IN POCKET AUTOMATIC TRANSMISSION VEHICLE TRIED MOVING BACK TO DRIVER DOOR WHICH HAD LOCKED OR WAS STUCK USED ALL STRENGTH TO TRY TO KEEP VEHICLE STATIONARY, WITHOUT MUCH H SUCCESS FINALLY, MOTHER WAS ABLE TO OPEN DRIVER DOOR FROM INSIDE I AM 53, WITH MILLIONS OF MYLES UNDER MY BELT....MOTHER IS 73 BOTH OF US STRAINED OURSELVES, KEEPING VEHICLE FROM MOVING. VEHICLE WAS PARKED ON PRIVATE, SLIGHTLY DESCENDING DRIVEWAY VEHICLE RENTED FROM ADVANTAGE RENT A CAR CALLED RENTAL COMPANY AND WAS NOT HELPED WE ARE STILL VERY SHAKEN FROM THE EXPERIENCE WILL NOT DRIVE VEHICLE AGAIN NO VIDEO FOOTAGE, JUST MY MOTHER AND I EXPERIENCED MALFUNCTION
Trend Over Time
Complaints by year
Other Issues
Common problems reported
Quick Summary
The 2018 Kia Optima has 8 Power Train complaints on file. 1 crashes have been reported. Review the timeline above for detailed owner experiences.