Kia Optima Complaints

7,843 consumer complaints on file.

#11708746January 5, 2026
ENGINE
The engine in my 2017 Kia Optima (VIN: [XXX] ) seized and locked up, a known defect associated with Kia’s Theta II 2.4L GDI engines. When I contacted Kia regarding engine replacement, I was told coverage would not apply because a required KSDS ECU update recall was not completed. During multiple phone calls with Kia Customer Care, Kia admitted that they did not have my contact information on file and added it during my call. Because Kia did not have my information, I never received any recall notification and was denied the opportunity to comply with the KSDS update. Kia has also provided conflicting information regarding whether recalls were open on my VIN while still relying on recall completion status to deny coverage. I believe Kia failed to properly notify me of a safety recall and is unfairly denying coverage for a known engine defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708758January 5, 2026
ENGINE
On or around October 17th 2025 I purchased a 2019 Kia OPT un aware that the vehicle had recall problems. Once I realized the vehicle had problems I took it to get it checked out. I only had the vehicle for 2 days before the problems occurred. The Kia service center fixed the recalls all except the bearing failure. They had my car for almost 30 because we went back and forth over this issue. This reason they gave me the reason they couldn’t fix my bearing problem was because I didn’t get it checked out before I had the problem. I didn’t know the vehicle had a problem until the recall came to my attention. I just don’t understand this explanation because it just doesn’t make any sense to me. This model vehicle had a premature bearing wear long before I had this vehicle. It’s a manufactured problem and just because it wasn’t reinstated before the vehicle had the problem Kia will not stand behind the problem with this vehicle and I don’t understand that explanation. Please, please help me get this issue fixed for me please. This has really taken a toll on me and I can’t afford to just junk this vehicle so please help me. Thank you so much for trying to help me with this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708860January 5, 2026
ENGINE, POWER TRAIN, FUEL/PROPULSION SYSTEM
The engine began exhibiting symptoms consistent with the known bearing wear defect covered under the manufacturer’s safety recall, including knocking noises, loss of power, and engine malfunction. The condition worsened to the point that the vehicle became unsafe to operate due to the risk of engine seizure and sudden loss of propulsion while driving. The vehicle was inspected by a Kia dealership, which confirmed engine damage consistent with the recall defect. The engine remains available for inspection. Despite an active, unrepaired safety recall for engine bearing wear that increases the risk of engine seizure and crash, the manufacturer and dealership have refused to perform the recall remedy unless the owner first replaces the engine at personal expense. The manufacturer has stated that the recall cannot be performed due to the current condition of the engine. This refusal leaves the vehicle with an open safety recall and no manufacturer-provided remedy, creating an ongoing safety risk due to potential engine seizure and loss of power while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708981January 5, 2026
AIR BAGS, FUEL/PROPULSION SYSTEM, POWER TRAIN
I purchased in July 2020, from sept 2020 I've had it at the dealership with shuddering, stalling and loss of acceleration. I originally thought fuel pump or transmission but kia said no. then in 2022 I received a letter from kia corporate stating low pressure fuel pump failure. so i called the dealership and told them the letter states everything I had been in to see them about numerous times. made an appointment they said they found an error but had no fix. I complained heavily due to the fact I sat there for 4 hours, and they knew they had no fix as of yet. It was too dangerous like this. so the Manager said he'd just replace it with a whole new fuel pump but it could also fail. I sent the car in for 4 days just to find out they did not replace it. they only changed the fuel filter. stating kia wont let them put in a new pump due to their system not showing any other issue. The problem persisted and multiple visits to kia to no avail. Then on top of that my air bag light came on Jan 4, 2024. They said it was my responsibility it's not covered 1138.67 it would cost me. Then in Feb kia corporate sent me a letter about airbags. I did not go back because the light eventually went off by itself without a fix, then April 17, 2024 the original problem got even worse, shuddering, lack of acceleration , stalling feeling. Dec. 10, 2025 back to Kia. they have a code for dual clutch and flywheel so they ordered it & had my car for 19 days. I called numerous times to see about progress. I was told they are trying to chase down a code with a tech line. 7 days after that I picked it up & they said they did not change out any parts because there was no code. They only did a cap discharge. I have my car back now after 19 days & it's still not fixed. I called Jan5, 2026 and they said if kia is to fix it they need a code to be present or it'll cost me several thousand, even if its a known issue. so far it's been in the shop 9 times and 24 days total.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708673January 4, 2026
ENGINE
Kia Engine Settlement-Kia America and Grand Forks KIA dealership is refusing a mandatory diagnostic test for excessive oil consumption under the Kia Theta II Engine Class Settlement, despite the vehicle having the required KSDS software update installed. The vehicle is consuming 1 quart of oil every 1000 miles, requiring constant topping off to prevent engine seizure. Vehicle was brought to Kia Grand Forks on 7/21/25 was told that the valve gasket needed to be changed. Engine light illuminated 10/2025 and car was unable to make it back to dealership from 58369. Vehicle was brought to local mechanic where I was told that the has failed and that the spark plugs had oil on them. Mechanic changed the spark plugs to make it to Grand Forks Kia on 10/14/25 I was told that the Turbo needed to be replaced for $3300 before they can do an oil consumption test. There were no issues with the turbo before it was driven to Grand Forks on 10/14/25. Kia America refuses to cover the engine warranty which will lead to "sudden engine stall, loss of power, or vehicle fire," which are primary safety concerns monitored by NHTSA.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708483January 3, 2026
AIR BAGS, UNKNOWN OR OTHER
Car was affected by emergency theft system locked car down when moving and caused airbags to deploy in which fractured my spine vertebra causing spinal fusion
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11708255January 2, 2026
ELECTRICAL SYSTEM, SERVICE BRAKES, STEERING
My 2015 Kia Optima has a failing ABS/HECU module consistent with the Kia ABS fire recall. The brake lights stay on constantly even when the brake pedal switch is unplugged. If I unplug the ABS/HECU module, the brake lights immediately turn off, which confirms the ABS module is back-feeding power into the brake light circuit. I also previously experienced the ABS pump running with the vehicle turned off. Currently the ABS, ESC, EPS, and Brake warning lights are illuminated and all stability/ABS functions are disabled. This is a clear safety hazard affecting braking, electrical safety, and vehicle fire risk. I have already been to the Kia dealer twice and they dismissed the issue after only checking the recall fuse. They refused to address the ABS module itself even though the vehicle is unsafe. The recall appears insufficient because the module has now failed. I need Kia to replace the ABS/HECU module under recall safety remedy.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708343January 2, 2026
FUEL SYSTEM, GASOLINE, SERVICE BRAKES, HYDRAULIC
The contact owns a 2014 Kia Optima. The contact received notifications of NHTSA Campaign Numbers: 20V10000 (FUEL SYSTEM, GASOLINE) and 21V331000 (SERVICE BRAKES, HYDRAULIC). The contact stated that while driving at an undisclosed speed, there was an abnormal fuel odor coming from the engine and entering the cabin of the vehicle through the A/C vents. The check engine warning light and ABS warning light was illuminated. The contact stated that on a separate occasion, while driving at an undisclosed speed, the vehicle stalled. The contact became aware that the vehicle was out of fuel. The contact added five gallons of fuel, and the vehicle stalled several miles down the road. The vehicle had again run out of fuel. The contact noticed that fuel was leaking from the vehicle. The vehicle was towed to the dealer, but was not diagnosed or inspected. The contact was informed that the fuel leak had nothing to do with the recall. However, the contact was informed that the battery portal was damaged and needed to be repaired before the recall repair was completed. The dealer asked the contact to pick up the vehicle. The vehicle remained at the dealer unrepaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708169January 1, 2026
STEERING
Steering flexible coupler worn in the Motor Driven Power Steering (MDPS) syste causing clicking noise and jittery steering
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708020December 31, 2025
UNKNOWN OR OTHER
Immediately after getting Kia's latest recall "Voluntary Emissions Service Campaign" software update, my transmission began to Hard-Shift between neutral and 1st gear, and when slowing down, from a gear to a neutral position with the transmission. The car has lunged a few times when going from neutral to 1st gear position--concerning. This is most noticeable when car is cold, but is still always noticeable. Stop-and-go traffic it's also most noticeable. I have notified local dealership by phone message and email but have not heard back in 2 weeks.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708064December 31, 2025
STEERING
Steering column coupler went bad. Unable to swap out the coupler alone ($12 part) and had to get a whole new column (over $1200). Some of the Kia's around this one's make and model were recalled but not this one. Without this repair driving would have been dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708082December 31, 2025
VEHICLE SPEED CONTROL, AIR BAGS, ENGINE
Check engine light was flashing and the car wouldn’t accelerate up to speed, wouldn’t turn over when tried to start.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707896December 30, 2025
ELECTRICAL SYSTEM, ENGINE
The contact called on behalf of her daughter who owns a 2017 Kia Optima. The contact stated while driving at approximately 60 MPH, the vehicle made an abnormal knocking sound, the cruise control was inoperative, the infotainment screen darkened, and the charging outlet was inoperative. The Check Engine warning light was intermittently illuminated. The vehicle was taken to the contact's residence, and the contact used a vehicle scanner to scan the vehicle. The contact stated that DTC: P1326 for the Knock Sensor Detection System (KSDS) was found, which detected excessive engine vibration. A dealer was contacted; however, the vehicle was not diagnosed or repaired by the dealer. No further information was available. The failure mileage was approximately 98,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707481December 29, 2025
LANE DEPARTURE: BLIND SPOT DETECTION, LANE DEPARTURE: WARNING, UNKNOWN OR OTHER
The car is experiencing the same problem reported on technical service bulletin SA187 (Blind spot detection (BSD) system logic improvement (SA 187)) BUT KIA states my VIN number is not listed under the service bulletin and therefore I have to pay $189 to get a software upgrade done. The "Check BSD system" illuminated in the instrument cluster has been cleared twice by my mechanic and still comes back after a few days. To me this issue should have been made a recall because of its criticality... the BSD system is a core safety feature of cars and reduces accidents substantially. There was no way for me to know my car has this problem unless it is made a recall. I have NOT had any accident related to this issue but i had to pick an incident date to complete this complaint. I have called KIA customer service at 1-800-333-4542 twice to find out whether the VIN number should be included in the service bulletin and the answer was no and whether i should report this to NHTSA with the possibility that certain VIN numbers were left out of the service bulletin in error. No answer as to what to do to investigate this was given by KIA. That's why i'm reporting this on here. The service bulletin has been attached to this complaint. My question to NHTSA is whether certain vehicles were left out of the service bulletin in error and whether the manufacturer is liable for the repair at no cost to the consumer. If NHTSA finds out the manufacturer is liable will you notify them to pay on a case per case basis or will you make this service bulletin a recall? Again this is SAFETY HAZARD that can cause crashes and accidents. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707345December 28, 2025
ENGINE, POWER TRAIN
The engine failed after a prior engine replacement performed by the manufacturer. The failure caused the vehicle to become non-operational and created a risk of sudden loss of power and engine stalling while driving. The vehicle required towing and could not be safely driven. This is a repeat engine failure involving the same vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707354December 28, 2025
UNKNOWN OR OTHER
Paint peeling off hood.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707061December 26, 2025
ENGINE
Engine brocked the pistones brock stock engine and pay for new engine
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11706800December 23, 2025
ENGINE
Took to Kia for engine burning excessive oil. They determined the cylinder wall was scorched due to piston ring. The warranty people say it’s normal wear and tear and won’t honor the warranty. It’s still sitting in their engine bay because they want me to pay for the diagnostic which I don’t have. $4000 roughly for that but it needs a new engine. The warranty should be covering this! NEVER PAY FOR AN EXTENDED WARRANTY!!! They will not help you
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11706817December 23, 2025
ENGINE
My engine is under the Kia class action lawsuit for the KDS with the rod bearing clearance issues. I have done all my oil changes with paper work available. I got the update to the ECU several years ago as needed to be covered. Now my engine has failed and I took to the dealer to check but they said I didn't have a specific code and that they can't do any testing to verify it would be under the warranty. I called Kia Customer Care and have talked to them several times. They have told me there wasn't a need for the code and that the dealer could do other testing. The dealer stated that they can't do the BCT test due to a cylinder not having compression. I told Kia this is all related to the bearing going out and they said they can't do anything if the dealer said it's not under warranty. So I have now been going in circles with kia and dealer since 11/18/25. I sent kia another email on 12/15/25 and another on 12/18/25 due to not receiving a response. It's now 12/23/25 and still no response. They have a service bulletin that I seen online that was for dealers if any issues with testing they had other options but still nothing has been done.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11706493December 22, 2025
AIR BAGS, SERVICE BRAKES, HYDRAULIC
The contact works as an investigator for the Utah Motor Vehicle Enforcement Division. The contact was investigating a 2014 Kia Optima with a salvaged title and reported that the air bags failed to deploy in a front-end collision. The contact stated that the air bags may have been removed or the air bag sensors were disconnected. The contact stated that while the driver was driving at 30-35 MPH, the brake pedal was depressed but the brakes failed to stop the vehicle. The vehicle crashed into another vehicle. The air bags failed to deploy. No warning light was illuminated. The driver's face struck the steering wheel upon impact. The driver received medical attention. A police report was filed. The vehicle was towed to a tow yard, where the insurance company investigated the crash, but had not yet deemed the vehicle totaled. The manufacturer was not made aware of the failure. The failure mileage was unknown.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0

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