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2010 Kia Optima Problems & Owner Complaints

75 NHTSA owner complaints
7 crash 2 fire 5 injury

Age-normalised, this year draws ~4.4 complaints per year on the road — ranking 7 of 7 Kia Optima years we track (1 = most complaints per year).

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What owners report

Power Train is the most-reported problem area on the 2010 Kia Optima, cited in 24 of 75 filed complaints (32%).

Air Bags is next (17 complaints, 23%), followed by Electrical System (13), Engine (9), Vehicle Speed Control (6).

Across all complaints, 7 report a crash, 2 report a fire, 5 report injuries.

The most safety-critical cluster is Air Bags: 6 crash, 5 injury report(s).

Complaints by vehicle system

Owner complaints filed with the U.S. NHTSA for the 2010 Kia Optima, grouped by the vehicle system each cites. A single complaint can name more than one system, so the group totals can add up to more than 75.

Power Train 24 1 crash 1 injury

“TL* THE CONTACT WAS DRIVING A RENTED 2010 KIA OPTIMA. THE CONSUMER STATED SHE STOPPED THE VEHICLE WHILE THE GEAR WAS IN DRIVE, TURNED OFF THE IGNITION AND ATTEMPTED TO REMOVE THE KEY FROM THE IGNITION, BUT IT WOULD NOT RELEASE. THE GEAR SHIFT HAD LOCK UP AND SHE WAS UNABLE TO MOVE THE GEAR INTO NEUTRAL OR THE PARK POSITION. SHE STATED THE MANUAL READ TO START CAR, THE GEAR SHIFT MUST BE IN THE PARK POSITION AND THE FOOT MUST BE ON THE BRAKE. THE CONSUMER STATED AS SHE SLIGHTLY MOVED THE KEY, THE VEHICLE STARTED WITH HIGH SPEED AND CRASHED HEAD ON INTO A BUILDING. THE CONSUMER WAS INJURED AND…”
NHTSA complaint #10334436, 2010 · crash · 1 injury(ies)

“The car lurches or jerks when slowing down or stopping at about 20 mph . Lurch or jerking is enough to jerk to the driver . Has anyone got answer to why the Kia Optima 2010 does this.”
NHTSA complaint #11452917, 2022

“Car has very hard downshift at low speed going from 2nd gear to 1st. Seems to be alot of these complaints and would be nice to know of a fix for this problem!”
NHTSA complaint #11418644, 2021

Air Bags 17 6 crash 5 injury

“TL* THE CONTACT OWNS A 2010 KIA OPTIMA. THE CONTACT CALLED ON BEHALF OF THE DRIVER. WHILE DRIVING 35 MPH, THE DRIVER LOST CONTROL OF THE VEHICLE AS IT INADVERTENTLY ACCELERATED. AS A RESULT, THE DRIVER STRUCK ANOTHER VEHICLE. THE CONTACT STATED THAT THE DRIVER HAD TO TURN OFF THE VEHICLE IN ORDER FOR IT TO STOP. THE AIR BAGS DID NOT DEPLOY. THE DRIVER SUSTAINED HEAD AND LEFT LEG INJURIES THAT DID NOT REQUIRE MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS NOT TAKEN TO A DEALER FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 24,000. *T…”
NHTSA complaint #11112204, 2017 · crash · 1 injury(ies)

“WHILE SITTING AT A TRAFFIC LIGHT, A VEHICLE REAR-ENDED MY 2010 KIA OPTIMA. THE DRIVER HIT MY KIA SO HARD, I HIT THE MUSTANG IN FRONT OF ME. NO AIR BAGS DEPLOYED UPON EITHER IMPACT. KIA WAS DRIVABLE, BUT THERE WERE NOTICEABLE DIFFERENCES IN THE WAY THE CAR DROVE (I.E. STARTED PULLING TO THE RIGHT, WHEEL SHAKING, ETC). THIS WAS THE EVENING OF 01/23/2014. ON 01/29/2014, THE STEERING WHEEL LOCKED UP AND COLLIDED WITH A PARKED VEHICLE (TOTALING THE KIA) @ 28-30 MPH. AGAIN AIR BAGS DID NOT DEPLOY, AND THE IMPACT LIFTED ME UP AND MY HEAD SHATTERED THE WINDSHIELD FROM THE TOP. SEAT BELT WAS IN USE, BU…”
NHTSA complaint #10562433, 2014 · crash · 1 injury(ies)

“THE VEHICLE WAS INVOLVED IN A 1 CAR ACCIDENT WHERE IT WENT OFF THE ROAD, INTO THE DITCH AND ROLLED SEVERAL TIMES. THERE WAS SIGNIFICANT DAMAGE TO THE FRONT END OF THE VEHICLE BUT NONE OF THE AIR BAGS DEPLOYED. THE BACK OF THE DRIVER'S SEAT WAS BROKEN DURING THE ACCIDENT AND WAS ALL THE WAY RECLINED RENDERING THE SEAT BELT INEFFECTIVE. THE INJURIES COULD HAVE BEEN MUCH WORSE THAN THEY ACTUALLY WERE GIVEN THE FACT THAT NO BAGS DEPLOYED. THE MANUFACTURER WAS OF LITTLE HELP WHEN CONTACTED AND DIDN'T SEEM TO CARE THAT THEIR PRODUCT COULD BE DEFECTIVE. *TR”
NHTSA complaint #10497669, 2012 · crash · 1 injury(ies)

Electrical System 13

“1.We were driving and the car just cut off. Not from the lack of fuel but cut off in the middle of traffic. (Available for inspection) 2.The car stopping in traffic running about 65 mph causes the safety of all on the highway. A very dangerous situation. 3. The problem has showed itself numerous times. 4. The car had been inspected/checked after the incident. There was no errors on the computer after diagnosis. 5. No errors nor warning lights prior the incident. After the incident, the car cranks right back up without error.”
NHTSA complaint #11646102, 2025

“Car would not engage into “Park” while attempting to park car in driveway. Shifter would not engage in any gear. Tried to reset button in center console. Contacted mechanic, he towed to garage. Plastic clip connected to cable broke. Earlier Kia’s had a recall due to this issue, why not all Kias due to it is still happening. I was very fortunate that this happened to me in my driveway and not on the highway. I understand there is the same part at the other end of the cable, connects to transmission and shifter, if it also breaks it is going to be very expensive to repair due to placement of the…”
NHTSA complaint #11533397, 2023

“THE IGNITION WANT TURN ALL TO WAY OFF I HAVE TO TURN IT OFF AND ON 2 OR 3 TIMES BEFORE IT WILL TURN COMPLETELY OFF SO I CAN REMOTELY LOCK THE DOOR. THE DRIVER SIDE REAR DOOR ACTUATOR WORK WHEN IT GET READY I HAVE TO UNLOCK THE DRIVER SIDE DOOR WITH KEY AND MANUALLY LOCK AND UNLOCK THE DOOR.”
NHTSA complaint #10980032, 2016

Engine 9

“1.We were driving and the car just cut off. Not from the lack of fuel but cut off in the middle of traffic. (Available for inspection) 2.The car stopping in traffic running about 65 mph causes the safety of all on the highway. A very dangerous situation. 3. The problem has showed itself numerous times. 4. The car had been inspected/checked after the incident. There was no errors on the computer after diagnosis. 5. No errors nor warning lights prior the incident. After the incident, the car cranks right back up without error.”
NHTSA complaint #11646102, 2025

“I was getting ready to go out of town for work so before I left my home town. I went to a place to get my oil change. Before going everything was fine. I left there and literally 5 minutes after my car killed. Once it start back. The motor start making a noise it’s been parked”
NHTSA complaint #11640182, 2025

“Rod bearing knocking noise. Vehicle stopped running when slowing down. Car is available for inspection. No warning lights come on. The rod bearing can pierce the engine and cause oil to leak and then a fire. Problem first identified by Monroe and then another independent when the car died in front of his shop- both confirmed this is a known issue with kias- but since ours is a 2010 it is not covered under the current recall for the same issue in years 2011 to 2013. I spoke with cooper Kia in Utica as I was looking for support with this issue and was told by Mike Digiovanni to call a lawyer.…”
NHTSA complaint #11483785, 2022

Vehicle Speed Control 6 1 crash 1 injury

“TL* THE CONTACT OWNS A 2010 KIA OPTIMA. THE CONTACT CALLED ON BEHALF OF THE DRIVER. WHILE DRIVING 35 MPH, THE DRIVER LOST CONTROL OF THE VEHICLE AS IT INADVERTENTLY ACCELERATED. AS A RESULT, THE DRIVER STRUCK ANOTHER VEHICLE. THE CONTACT STATED THAT THE DRIVER HAD TO TURN OFF THE VEHICLE IN ORDER FOR IT TO STOP. THE AIR BAGS DID NOT DEPLOY. THE DRIVER SUSTAINED HEAD AND LEFT LEG INJURIES THAT DID NOT REQUIRE MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS NOT TAKEN TO A DEALER FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 24,000. *T…”
NHTSA complaint #11112204, 2017 · crash · 1 injury(ies)

“ENGINE BLEW DOING 40-45 ON A COUNTY ROAD 1,000 RPM 5TH GEAR, IN AUTOMATIC. 2ND TO 1ST, SOFT TO HARD KICK. VEHICLE SPEED SENSOR MUST BE FAULTY I HAVE TO PUMP BRAKE MORE TO SLOW THE ENGINE SPEED IT LIKES TO BOG TRYING TO SPEED UP IN AUTOMATIC MODE”
NHTSA complaint #11403364, 2021

“WHEN COMING TO A STOP MY CAR SHIFTS FROM 3RD TO 2ND HER VERY ABRUPTLY. IT MAKES IT FEEL AS THOUGH I'VE SLAMMED ON MY BRAKES VERY SUDDENLY. IT ALSO DOES IT WHEN I SLOW MY CAR THEN PRESS THE GAS TO ACCELERATE SOMETIMES. I'VE TAKEN MY CAR TO THE DEALERSHIP OVER 5 TIMES SINCE FIRST PURCHASED BY MY MOTHER IN 2010 AND THE DEALERSHIP ALWAYS CLAIMED TO BE UNABLE TO NOTICE THE SUDDEN JERKING. THIS JERKING HAPPENS MOSTLY ON THE STREET DUE TO MY CONTINUAL STOP AND GO, BUT IT HAS ALSO HAPPENED WHILE GETTING ON THE FREEWAY AND DURING FREEWAY TRAFFIC.”
NHTSA complaint #11174898, 2019

Service Brakes 4

“Car would not engage into “Park” while attempting to park car in driveway. Shifter would not engage in any gear. Tried to reset button in center console. Contacted mechanic, he towed to garage. Plastic clip connected to cable broke. Earlier Kia’s had a recall due to this issue, why not all Kias due to it is still happening. I was very fortunate that this happened to me in my driveway and not on the highway. I understand there is the same part at the other end of the cable, connects to transmission and shifter, if it also breaks it is going to be very expensive to repair due to placement of the…”
NHTSA complaint #11533397, 2023

“LOUD GRINDING NOISE DEVELOPED IN RIGHT REAR BRAKE. UPON HIS EXAMINATION, MECHANIC FOUND RIGHT REAR BRAKE CALIPER FROZEN IN THE ENGAGED OR CLOSED POSITION. ALSO, LEFT REAR BRAKE CALIPER FOUND TO BE FROZEN IN THE DISENGAGED OR OPEN POSITION. IN ESSENCE, BOTH REAR BRAKES WERE INOPERABLE! WE WERE DRIVING A CAR THAT ONLY HAD FRONT BRAKES FUNCTIONING PROPERLY. OUR MECHANIC COULDN'T REMEMBER A CASE WHERE BOTH REAR BRAKES WERE INOPERABLE ON A CAR. WE BELIEVE THIS PROBLEM TO BE UNACCEPTABLE AND EXTREMELY DANGEROUS ON A VEHICLE WITH ONLY 74,314 MILES AND ONLY 5 YEARS OLD.”
NHTSA complaint #10747305, 2015

“WE HAVE BEEN HAVING ELECTRICAL ISSUES WITH OUR 2010 KIA OPTIMA, WHICH CURRENTLY HAS 45000 MILES ON IT. THE TPMS, (!) AND THE AIRBAG "OFF/ON" LIGHTS ALL GO OFF AND ON CONTINUALLY. THEY WILL BE ON FOR A FEW DAYS, THEN GO OFF AND STAY OFF FOR AN UNDETERMINED AMOUNT OF TIME. THE BRAKES ALSO JERK OUR CAR VERY ROUGHLY FORWARD WHEN WE ARE BRAKING. EVEN IF WE ARE GOING 5 MPH, WE PRESS ON THE BRAKES, THEN THE CAR GIVES A BIG JERK BEFORE IT COMES TO A COMPLETE STOP. *TR”
NHTSA complaint #10554972, 2013

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Unknown Or Other 4 1 fire

“DRIVING HOME FROM WORK MAY7 ON I64 ST.CHARLES CO,MO.SMOKE COMING FROM UNDER HOOD AS I APPROACHED BRIDE OVER MISSOURI RIVER AND AS SOON AS I CROSSED BRIDGE IT WAS WORSE AND I CALLED HOME TO SAY MY CAR WAS ON FIRE AND I WAS GETTING OUT OF IT ,THEN I CALLED 911 AND POLICE AND FIRE DEPT FROM FROM COTTLEVILLE ARRIVER. THE CAR COMPLETELY BURNED ALL THE WAY TO THE TRUNK. T HERE WAS NO APPARENT CONDITION TO HAVE CAUSED IT TO BURN AS CAR WAS WELL MAINTAINED AND IN GOOD CONDITION”
NHTSA complaint #11143621, 2018 · fire

“I was getting ready to go out of town for work so before I left my home town. I went to a place to get my oil change. Before going everything was fine. I left there and literally 5 minutes after my car killed. Once it start back. The motor start making a noise it’s been parked”
NHTSA complaint #11640182, 2025

“Car would not engage into “Park” while attempting to park car in driveway. Shifter would not engage in any gear. Tried to reset button in center console. Contacted mechanic, he towed to garage. Plastic clip connected to cable broke. Earlier Kia’s had a recall due to this issue, why not all Kias due to it is still happening. I was very fortunate that this happened to me in my driveway and not on the highway. I understand there is the same part at the other end of the cable, connects to transmission and shifter, if it also breaks it is going to be very expensive to repair due to placement of the…”
NHTSA complaint #11533397, 2023

Latches/Locks/Linkages 3

“OUR VEHICLE STARTED ONLY UNLOCKING THE 3 PASSENGER SIDE DOORS, WHEN USING THE KEYFOB TO UNLOCK. THE DRIVERS DOOR WILL STAY LOCKED AND YOU HAVE TO MANUALLY UNLOCK VEHICLE WITH KEY. NOW 2 OF OUR OTHER DOORS(BOTH REAR) DONT UNLOCK. ALL THE DOORS DO NOT LOCK WITH THE KEYFOB AND WHEN WE PUSH THE LOCK BUTTON INSIDE THE VEHICLE. WE HAVE TO MANUALLY LOCK/UNLOCK THE DOORS, WHICH IS A PAIN IN THE BUTT WHEN YOU HAVE SMALL CHILDREN! *TR”
NHTSA complaint #10638485, 2014

“DRIVER DOOR FAILS TO UNLOCK WHEN REMOTE IS PRESSED TO UNLOCK BUT WILL UNLOCK ALL OTHER DOORS. THE DRIVERS DOOR AND ALL OTHER DOORS WILL LOCK WITH REMOTE BUT ONLY THE DRIVERS DOOR WILL NOT UNLOCK. *TR”
NHTSA complaint #10587529, 2014

“MY REAR PASSENGER DOOR LOCK STOPPED WORKING. THE DOOR WILL NOT UNLOCK. I CALLED THE DEALERSHIP WHILE I WAS STILL UNDER WARRANTY BUT THEY COULD NOT GET ME IN FOR AN APPOINTMENT IN A TIMELY MANNER AND NOW MY WARRANTY HAS EXPIRED AND THE DEALERSHIP IS TELLING ME IT COSTS OVER $200 TO FIX THE PROBLEM. I CONSIDER THIS TO BE A SAFETY ISSUE. IF I WERE EVER IN AN ACCIDENT THE PERSON SITTING IN THIS SEAT WOULD HAVE A HARD TIME GETTING OUT OF THE CAR. *TR”
NHTSA complaint #10505793, 2012

Engine And Engine Cooling 2 1 crash 1 fire

“The contact owns a 2010 Kia Optima. The contact stated while driving 1 mph, the vehicle started overheating then there was an abnormally loud sound coming from the engine. Upon investigation, it was found that the radiator had a hole on the right side. The vehicle was not taken to a local dealer and was not diagnosed. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 135,000.”
NHTSA complaint #11417917, 2021 · fire

“I WAS PARKING MY CAR IN A LOT WHEN IT SURGED FORWARD (ACCELERATED SUDDENLY) WITHOUT MY DEPRESSING THE ACCELERATOR CAUSING ME TO LOSE CONTROL OF MY CAR AND HIT ANOTHER VEHICLE, SEVERELY DAMAGING THE OTHER VEHICLE AND MINE. MY CAR WAS TOWED TO A REPAIR FACILITY. *TR”
NHTSA complaint #10340860, 2010 · crash

Exterior Lighting 2

“AIR BAG LIGHTS WILL NOT GO OFF DEALER RESET BUT CAME BACK ON SOON AFTERWARDS. ANOTHER DEALER SAID IT WAS NOT COVERED UNDER WARRANTY AND PART WAS OVER $1000. MULTIPLE DEAD CAR BATTERIES DUE TO RUNNING LIGHTS NOT TURNING OFF AFTER YOU PARK THE CAR. PLEASE FOR THE LOVE OF EVERYTHING GOOD IN THIS WORLD JUST RECALL AND FIX ALREADY.”
NHTSA complaint #10934582, 2015

“TL* THE CONTACT OWNS A 2010 KIA OPTIMA. THE CONTACT STATED THAT THE VEHICLE DOWNSHIFTED VIOLENTLY. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE FAILURE WAS CONFIRMED. THE CONTACT ALSO MENTIONED THAT THE PASSENGER SIDE LOW BEAM HEADLIGHT FAILED DUE TO THE A FAILED WIRE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND INFORMED THE CONTACT THAT THE VEHICLE WAS NOT INCLUDED IN THE MANUFACTURER'S RECALL. THE FAILURE MILEAGE WAS APPROXIMATELY 100,000.”
NHTSA complaint #10561329, 2011

Seat Belts 2 1 crash 1 injury

“WHILE SITTING AT A TRAFFIC LIGHT, A VEHICLE REAR-ENDED MY 2010 KIA OPTIMA. THE DRIVER HIT MY KIA SO HARD, I HIT THE MUSTANG IN FRONT OF ME. NO AIR BAGS DEPLOYED UPON EITHER IMPACT. KIA WAS DRIVABLE, BUT THERE WERE NOTICEABLE DIFFERENCES IN THE WAY THE CAR DROVE (I.E. STARTED PULLING TO THE RIGHT, WHEEL SHAKING, ETC). THIS WAS THE EVENING OF 01/23/2014. ON 01/29/2014, THE STEERING WHEEL LOCKED UP AND COLLIDED WITH A PARKED VEHICLE (TOTALING THE KIA) @ 28-30 MPH. AGAIN AIR BAGS DID NOT DEPLOY, AND THE IMPACT LIFTED ME UP AND MY HEAD SHATTERED THE WINDSHIELD FROM THE TOP. SEAT BELT WAS IN USE, BU…”
NHTSA complaint #10562433, 2014 · crash · 1 injury(ies)

“TL* THE CONTACT OWNS A 2010 KIA OPTIMA. WHILE THE VEHICLE WAS OPERATED, THE PASSENGER NOTICED THAT THE SEAT BELT WAS NOT CONNECTED. THE WARNING CHIME DID NOT INDICATE THAT THE SEAT BELT WAS NOT LATCHED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE SERVICE MANAGER DIAGNOSED THAT THE FAILURE WAS INHERENT TO THE VEHICLE. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 70,500.”
NHTSA complaint #10876351, 2016

Steering 2 1 crash 1 injury

“WHILE SITTING AT A TRAFFIC LIGHT, A VEHICLE REAR-ENDED MY 2010 KIA OPTIMA. THE DRIVER HIT MY KIA SO HARD, I HIT THE MUSTANG IN FRONT OF ME. NO AIR BAGS DEPLOYED UPON EITHER IMPACT. KIA WAS DRIVABLE, BUT THERE WERE NOTICEABLE DIFFERENCES IN THE WAY THE CAR DROVE (I.E. STARTED PULLING TO THE RIGHT, WHEEL SHAKING, ETC). THIS WAS THE EVENING OF 01/23/2014. ON 01/29/2014, THE STEERING WHEEL LOCKED UP AND COLLIDED WITH A PARKED VEHICLE (TOTALING THE KIA) @ 28-30 MPH. AGAIN AIR BAGS DID NOT DEPLOY, AND THE IMPACT LIFTED ME UP AND MY HEAD SHATTERED THE WINDSHIELD FROM THE TOP. SEAT BELT WAS IN USE, BU…”
NHTSA complaint #10562433, 2014 · crash · 1 injury(ies)

“MY OPTIMA HAS 104,000 MILES. JUST LAST WEEK WHILE DRIVING ON WET ROADS, I LOST CONTROL AS THE POWER STEERING STOPPED WORKING. THE BATTERY LIGHT COMES ON DURING THIS PERIOD FOR BETWEEN 5-30 SECONDS AS YOU LOOSE ALMOST ALL CONTROL OF YOUR VEHICLE'S STEERING. JUST AS YOUR VEHICLE GAINS POWER STEERING AGAIN, A SCREECHING SOUNDS COMES FROM THE ENGINE COMPARTMENT (MAYBE BELTS RE-ENGAGING). IT HAS BEEN RAINING HER THE PAST WEEK AND THE ISSUE HAS HAPPENED ABOUT 8 TIMES. SOMETIMES DIRECTLY AFTER DRIVING THROUGH PUDDLES, AND SOMETIMES JUST WHILE DRIVING. THE ISSUE ONLY OCCURS THOUGH WHEN THE ROADS ARE W…”
NHTSA complaint #11311465, 2020

Structure 2

“THE WEATHER STRIP ON THE WINDSHIELD ON THE DRIVER SIDE JUST STRARTED LIFTING UP AND COMING OFF AS I WAS DRIVING DOWN THE ROAD. I CHECKED THE DAMAGE AND SAW THE BLACK PIECE COMPLETELY OFF OF THE WINDSHIELD. IT CONTINUED TO LIFT MORE AS I DROVE. WHEN IT RAINED I BELIEVE WATER IS NOW IN THE SENSORS BECAUSE MY ODOMETER ONLY READS "ECO" ABOVE THE ACTUAL ODOMETER READING. IT BECAME SUCH A HAZARD WHILE DRIVING I HAD TO TAPE DOWN THE WEATHER STRIP JUST TO KEEP IT FROM FULLY COMING OFF MY CAR AND CAUSING FURTHER PAINT DAMAGE TO THE SIDE IT SMACKS AGAINST. NO MECHANIC WILL FIX THE ISSUE DUE TO BEING A M…”
NHTSA complaint #10807726, 2015

“VARIOUS DOORS WILL NOT PROPERLY LOCK/UNLOCK FROM THE ELECTRIC SWITCH AND THE KEY FOB. THIS IS AN INTERMENT FAILURE AFFECTING MULTIPLE DOORS IN THE VEHICLE. DIFFERENT DOORS LOCKS ARE FAILING AT DIFFERENT TIMES, BOTH LOCKING AND UNLOCKING. BASED ON MY RESEARCH ON THE INTERNET, THIS AFFECTS A SIGNIFICANT NUMBER OF 2005 TO 2010 OPTIMAS. THIS DEFECT COULD CAUSE OCCUPANTS TO BE TRAPPED IN THE EVENT OF AN ACCIDENT OR EMERGENCY.”
NHTSA complaint #10749374, 2015

Child Seat 1

“PURCHASED A SUNSHINE KIDS RADIAN XTSL AND INSTALLED IT REARFACING IN THE BACK CENTER SEAT OF A 2010 KIA OPTIMA. THE LATCH LOOSENS BY ITSELF, THIS WAS/IS INSTALLED PROPERLY. (RELATED VEHICLE INFORMATION: MODEL YEAR=2010, MAKE=OPTIMA, MODEL=KIA). *TR”
NHTSA complaint #10379712, 2010

Electronic Stability Control (Esc) 1

“THE WEATHER STRIP ON THE WINDSHIELD ON THE DRIVER SIDE JUST STRARTED LIFTING UP AND COMING OFF AS I WAS DRIVING DOWN THE ROAD. I CHECKED THE DAMAGE AND SAW THE BLACK PIECE COMPLETELY OFF OF THE WINDSHIELD. IT CONTINUED TO LIFT MORE AS I DROVE. WHEN IT RAINED I BELIEVE WATER IS NOW IN THE SENSORS BECAUSE MY ODOMETER ONLY READS "ECO" ABOVE THE ACTUAL ODOMETER READING. IT BECAME SUCH A HAZARD WHILE DRIVING I HAD TO TAPE DOWN THE WEATHER STRIP JUST TO KEEP IT FROM FULLY COMING OFF MY CAR AND CAUSING FURTHER PAINT DAMAGE TO THE SIDE IT SMACKS AGAINST. NO MECHANIC WILL FIX THE ISSUE DUE TO BEING A M…”
NHTSA complaint #10807726, 2015

Equipment 1

“TL*THE CONTACT OWNS A 2010 KIA OPTIMA. THE CONTACT STATED THAT WHEN INSERTING A CD INTO THE CD PLAYER IT BECAME EXTREMELY HOT TO THE TOUCH AND HE WAS AFRAID IT COULD START A FIRE. THE VEHICLE WAS INSPECTED BY A DEALER WHO INFORMED HIM THAT IT WAS NORMAL. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 54. UPDATED 01/11/11*LJ UPDATED 01/31/11 *BF UPDATED 02/14/11”
NHTSA complaint #10368530, 2010

Forward Collision Avoidance 1

“I was getting ready to go out of town for work so before I left my home town. I went to a place to get my oil change. Before going everything was fine. I left there and literally 5 minutes after my car killed. Once it start back. The motor start making a noise it’s been parked”
NHTSA complaint #11640182, 2025

Fuel/Propulsion System 1

“WHEN ACCELERATING OR SLOWING DOWN MY VEHICLE JERK EVEN WHEN I'M ON THE HIGHWAY AND HAVE THE CRUISE CONTROL SET IT WILL DO THE SAME THING. I WOULD LIKE TO KNOW WHAT I NEED TO DO OR IF THERE IS ANY KIND OF RECALL ON THIS BECAUSE I REALLY CAN'T AFFORD TO TAKE IT AND HAVE IT LOOKED AT. I HAVE SEEN MULTIPLE REPORTS OF THE SAME PROBLEM AND WITH ALL OF THE REPORT I DON'T SEE HOW KIA HAS NOT DONE ANYTHING ABOUT IT.”
NHTSA complaint #10934080, 2016

Suspension 1

“VEHICLE HAS A TERRIBLE RATTLE COMING FROM THE REAR END WHILE DRIVING AND THE VEHICLE MOVES FROM SIDE TO SIDE. NOT SURE WHAT IT IS. BOUGHT IN 2016”
NHTSA complaint #11259003, 2016

Tires 1

“TL* THE CONTACT OWNS A 2010 KIA OPTIMA. THE CONTACT STATED THAT UPON PURCHASING THE VEHICLE, HE NOTICED THAT IT WAS NOT EQUIPPED WITH A SPARE TIRE, JACK, OR LUG NUT WRENCH. THE MANUFACTURER WAS NOTIFIED AND THEY STATED THAT THEY WOULD NOT SUPPLY THE CONTACT WITH THE MISSING ITEMS BECAUSE THE VEHICLE EXHIBITS BETTER FUEL EFFICIENCY WITHOUT THEM. THE CONTACT DID NOT FEEL SAFE DRIVING THE VEHICLE WITHOUT THE MISSING EQUIPMENT. THE FAILURE AND CURRENT MILEAGES WERE 1,500.”
NHTSA complaint #10446151, 2011

Visibility 1

“I LIVE IN IOWA AND WE GOT 6 INCHES OF SNOW.... WENT TO CLEAN THE SNOW OFF MY CAR WITH THE BRUSH PART OF SNOW BRUSH AND WHILE DOING THAT WAS ALSO WARMING UP MY CAR AND AS I WAS CLEANING OFF THE BACK WINDSHIELD I NOTICED A HOLE IN THE WINDOW..... MY BACK WINDOW NOT ONLY HAD A HOLE IN IT BUT SHATTERED!! HOW DOES THIS HAPPEN?!?! I DID NOTHING WRONG!!! NOTHING I HAVEN'T DONE A MILLION TIMES BEFORE AND WHY AM I RESPONSIBLE FOR PAYING FOR THIS?!?!? *TR”
NHTSA complaint #10680355, 2015

Visibility/Wiper 1

“THE WEATHER STRIP ON THE WINDSHIELD ON THE DRIVER SIDE JUST STRARTED LIFTING UP AND COMING OFF AS I WAS DRIVING DOWN THE ROAD. I CHECKED THE DAMAGE AND SAW THE BLACK PIECE COMPLETELY OFF OF THE WINDSHIELD. IT CONTINUED TO LIFT MORE AS I DROVE. WHEN IT RAINED I BELIEVE WATER IS NOW IN THE SENSORS BECAUSE MY ODOMETER ONLY READS "ECO" ABOVE THE ACTUAL ODOMETER READING. IT BECAME SUCH A HAZARD WHILE DRIVING I HAD TO TAPE DOWN THE WEATHER STRIP JUST TO KEEP IT FROM FULLY COMING OFF MY CAR AND CAUSING FURTHER PAINT DAMAGE TO THE SIDE IT SMACKS AGAINST. NO MECHANIC WILL FIX THE ISSUE DUE TO BEING A M…”
NHTSA complaint #10807726, 2015

How we read this (methodology)

How to read this: raw complaint totals are not a clean reliability score — a model year with more cars sold, or simply more years on the road, accumulates more complaints regardless of how good it is. So this page leans on two signals that are not distorted by sales volume: the share of complaints falling on each vehicle system (the breakdown above) and NHTSA's own crash / fire / injury / death flags. When we compare model years of the same model, we normalise by years on the road (complaints ÷ vehicle age) rather than comparing raw totals. Age-normalised, the 2010 Kia Optima draws about 4.4 complaints per year on the road, ranking 7 of 7 among the Kia Optima model years we have ingested (1 = most complaints per year on road).

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