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Engine & cooling

Kia K5 Engine problems by year

92 complaints filed with NHTSA about the Kia K5's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.

Engine complaints by model year

YearEngine complaintsCrashesInjuriesRecalls
20265000
20253130
20249000
202313000
202230230
202132000

Latest K5 engine complaints

2023 Kia K5Engine & cooling

I bought a 2023 Kia K5 GT vehicle as a CERTIFIED PREOWNED from Rick Case KIA Sunrise, FL. I paid $30,000.00 + an extended warranty for about $4,000.00, traded in my vehicle (for $9,000.00) and put a down payment of $5,000.00. Within two days of buying the vehicle in April of 2025 my car was back at the dealership in the service department for transmission issues. My vehicle has had 4 total transmissions and it is 3 years old (original transmission, 3 replacement transmissions). SHOCKER - it is STILL having...

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transmission problems. I have NEVER had a good drive in this vehicle. I filed a request for a buy back with Kia Customer Care and they told me I did not meet the requirements. My car has been in the dealerships service centers 9 times due to transmission issues that continue arrising since I bought the vehicle about a year and a half ago. Kia Customer Care stated the only option was to open a "tech line" with Kia from the dealership directly so again I dropped my car off for over a week and they could not replicate the issue to start the tech line. I took a 45 minute test drive with the manager and duplicated it twice but the manager stated they could not feel it and sent me home with my vehicle. The vehicle stops accelerating all together in the middle of traffic, shudders when trying to speed up, sounds like and feels like the entire engine is going to drop out of the car to the floor. You can feel the gears slip. Even though it is more infrequent now, it still happens and I am afraid to drive my car.

Filed Incident EngineNHTSA 11772043
2021 Kia K5BrakesEngine & coolingFuel system

I am filing a safety complaint regarding my Kia K5 because I am concerned about a potentially dangerous mechanical defect. I purchased this vehicle used from CarMax approximately two years ago. Within the first 30 days of ownership, the steering wheel began shaking. CarMax repaired the problem at no cost after ordering a replacement part. Approximately two weeks ago, the steering wheel began shaking again. The problem has now progressed to the vehicle shaking, feeling as though it is skidding or slipping, and...

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failing to accelerate properly. The check-engine light is illuminated. I contacted Kia regarding recall SC250 and was told that my vehicle does not qualify. I am concerned because my vehicle is now experiencing symptoms that I believe warrant investigation into whether they could be related to the defect addressed by this recall. I am requesting that NHTSA investigate whether my vehicle may have an unresolved or related safety defect, and whether other vehicles excluded from the recall could be experiencing similar problems. I am concerned about the risk of losing acceleration while driving, potentially putting me and other motorists in danger. I can provide my VIN, vehicle mileage, repair history from CarMax, and any diagnostic information available.

Filed Incident Service brakes · Engine · Fuel / propulsion systemNHTSA 11770020
2022 Kia K5Engine & cooling

Verified by ASE Certified Mechanic Premature PCV valve/ Oil Separator failure. Causes codes such as P0507, P0171, P0471. This can trigger limp mode, sudden loss of speed/engine power, thus increasing the event of an accident.

Filed Incident EngineNHTSA 11768182
2021 Kia K5Engine & coolingFuel system

Vehicle experienced a severe engine misfire (P0302), rough running, and loss of power while driving. Dealership confirmed the Purge Control / PCV valve failed (replaced under Recall SC356 / 25V-794), but charged out-of-pocket for the Cylinder 2 ignition coil that failed as a direct result of the PCV valve failure. The Dealership replaced the Purge Control/PCV valve at this time - the recall was not resolved until this time - I wasn't even aware of this recall until this incident. This ocurred on [redacted] and...

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as a result I was stranded 1500 miles from home in [[redacted]] (I live in [[redacted]] and was driving the vehicle to my son at the University of [redacted] in [[redacted]]. The car was running fine until I stopped briefly in [[redacted]] and when I started the car, the engine light came on and the car's engine started sputtering and losing power as I was driving. Due to the fact that I was not in the vicinity of any Kia Dealerships or any open mechanics as it was Labor Day, I somehow managed to drive the car all the way to [[redacted]] as this was the closest dealership (over 120 miles away from where I was when the engine light came on). Once I arrived in [[redacted]], I checked into a hotel. I then attempted to drive to the nearest Kia Dealership the following morning at approximately 6:45 am and the engine light started flashing. I knew that this meant I was not able to safely drive the car even the additional 5 miles to the dealership so I pulled over and called Kia Roadside assistance and the dealership. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Incident Engine · Fuel / propulsion systemNHTSA 11764825
2022 Kia K5Electrical systemEngine & coolingFuel systemFire

- The exact component that failed has not yet been determined. The vehicle experienced a sudden loss of acceleration while driving, followed by a popping noise, smoke, and a fire that severely damaged the vehicle. The vehicle is a 2022 Kia K5 GT-Line, VIN [[redacted]]. The vehicle has an open Safety Recall SC356 / NHTSA Recall 25V794 involving the purge control system check valve and fuel tank, which may result in fuel leakage and an increased risk of fire. The recall repair had not been performed prior to the...

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incident. The vehicle is currently being preserved and is available for inspection upon request. - The vehicle caught fire while driving on [redacted], in [[redacted]]. The vehicle suddenly stopped accelerating, a popping noise, and then smoke began coming from the vehicle shortly afterward. The vehicle subsequently caught fire and was destroyed. The incident created a serious risk of injury to me, other occupants, nearby motorists, and others in the area. Fortunately, there were no injuries. - The cause of the failure and fire has not yet been confirmed. The vehicle was severely damaged by the fire. The vehicle has an open Kia SC356 / NHTSA 25V794 safety recall, which we were unaware of, but it has not yet been determined whether the condition addressed by that recall caused or contributed to this incident. - The Killeen Fire Department responded to the vehicle fire and extinguished the fire. The incident has also been reported to my insurance company, and an insurance claim is currently pending. No inspection has yet been performed to determine the cause of the fire. The vehicle is being preserved so that it remains available for inspection by the manufacturer, insurance representatives, NHTSA, or an independent expert if necessary. -No warning lamps or warning messages prior to the incident. While driving, the vehicle suddenly stopped accelerating, then a popping noise was heard, followed by smoke, and the vehicle subsequently caught fire. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Incident Electrical system · Engine · Fuel / propulsion systemNHTSA 11763269
2022 Kia K5Electrical systemEngine & coolingDriver assistance

All lights on dash appear. Forward collision warning, blind spot warning, other warnings. Car loses ability to accelerate for a few moments and makes unsafe to drive. RPM needle bounces.

Filed Incident Electrical system · Engine · Forward collision avoidanceNHTSA 11761727
2024 Kia K5Acceleration & cruise controlEngine & coolingDriver assistance

I bought this vehicle less than 60 days ago and there is transmission hesitation, hard engagement in lower gears, Rough jerking shifting along with acceleration lag. Erracric shifting and phantom braking. I have taken it into the dealership I bought it at at they are not seeing anything. It currently is at another Kia dealership for the past two days. This vehicle is going to cause an accident that puts my safety and others at risk. There is no warning lights that come on. I have done my research and there has been other complaints from other consumers having the same issues. I do have video of in town driving but have not been on the highway

Filed Incident Vehicle speed control · Engine · Forward collision avoidanceNHTSA 11760419
2021 Kia K5Engine & cooling

The contact owned a 2021 Kia K5. The contact stated that while driving at an undisclosed speed, the vehicle stalled. The failure was a recurring failure. The message "Not Emissions Ready" was displayed. The vehicle was towed. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 20,000.

Filed Incident Engine and engine coolingNHTSA 11759133
2022 Kia K5Engine & cooling

The contact owns a 2022 Kia K5. The contact stated that while driving 50-65 MPH, the vehicle was jerking and came to a sudden stop. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, and it was determined that there was an issue with the water pressure cooling system. The vehicle was taken to the local dealer, who was unable to determine the cause of the failure. The vehicle was not diagnosed or repaired. The dealer confirmed that there was no warranty coverage for the...

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repair on the vehicle. The contact called the warranty company and informed the contact that the warranty mileage was 100,000. The manufacturer was contacted and informed the contact that the dealers were independently owned. No assistance was provided. The failure mileage was approximately 76,000.

Filed Incident Engine and engine coolingNHTSA 11753069
2021 Kia K5Fuel systemWheels & tiresEngine & cooling

The contact owns a 2021 Kia K5. The contact stated that while driving approximately 55 MPH, the fuel gauge suddenly went from one-half tank to empty. The fuel level displayed 120 miles to empty. The contact attempted to refuel the vehicle but was unable to add fuel to the tank. The contact also stated that the oil warning light and the TPMS warning light was illuminated. The contact associated the failure with NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline). The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 119,185.

Filed Incident Fuel system, gasoline · Tires · EngineNHTSA 11752335
2023 Kia K5Engine & coolingFuel systemDriver assistance

I am filing this complaint regarding Kia America's handling of a safety recall and repurchase of my 2023 Kia K5 GT-Line (VIN: [[redacted]]. I purchased this vehicle used on [redacted], and financed it through Capital One. After taking my vehicle to an authorized Kia dealership for the fuel tank valve safety recall, I was informed that my vehicle was unsafe to drive and could not be repaired. The dealership advised me that Kia would be repurchasing the vehicle. Kia has offered to buy back the vehicle, but the...

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settlement being offered does not appear fair under the circumstances. Although Kia has determined that my vehicle is unsafe and unrepairable due to a manufacturer safety defect, I have only been provided with 15 days of rental vehicle coverage while Kia's own repurchase letter states that the process may take 60 to 90 days to complete. This could leave me without transportation through no fault of my own. Additionally, Kia has refused to reimburse my $4,000 down payment or provide any additional compensation related to the loss of use of my vehicle. Their offer also includes a substantial mileage deduction under certain options, despite the fact that this repurchase is the result of a manufacturer safety defect rather than a voluntary sale or trade-in. I requested written clarification regarding my settlement options, rental coverage, loan payoff, and reimbursement of my expenses. Rather than answering my questions, Kia responded only that the offer was "firm" and compliant with Florida law, without addressing the specific concerns I raised. I am requesting that this matter be reviewed to determine whether Kia is handling this safety recall and repurchase fairly and whether consumers whose vehicles are deemed unsafe and unrepairable should receive adequate transportation assistance and fair compensation while waiting for the manufacturer to complete the repurchase process. I respectfully request assistance in reviewing Kia America's handling this case. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Incident Engine · Fuel / propulsion system · Forward collision avoidanceNHTSA 11752242
2021 Kia K5Fuel systemSeats & seat beltsEngine & cooling

The contact owns a 2021 Kia K5. The contact stated that there were failures with the spark plugs. While driving at an undisclosed speed, the vehicle shuddered, and the engine sputtered. The contact stated that fuel spewed out of the filler neck while refueling the vehicle, and the fuel gauge incorrectly indicated that the fuel tank was empty after refueling. Additionally, there was an abnormal egg and sulfur odor coming from the vehicle with the check engine warning light intermittently illuminated. The contact...

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stated that the vehicle was taken to a local dealer and inspected under NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline). During the inspection, the seats were damaged. The vehicle was not repaired. The manufacturer was notified of the failure and was negotiating a buyback. The failure mileage was approximately 120,000.

Filed Incident Fuel system, gasoline · Seats · EngineNHTSA 11752163
2022 Kia K5Seats & seat beltsEngine & coolingFuel system

Driving anywhere in general and which ever speed my gas would leak and smell would over take the car and I have a [[redacted]] and [[redacted]] babies. This is not the first but the third recall and this is a fire hazard I can't imagine my car going in flames while we're already suffering with a leaking gas smell every time we drive the car I can loose my whole family I will soon being filing a lawsuit against this I want a new vehicle completely I do not feel safe in this car with my kids at all there's always an...

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issue and my dealership is over 40min away to be going so often throughout the years of having this car this is completely unsafe dangerous and just out right unexpectedable and will be filing soon for a new car and compensation INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Incident Seats · Engine · Fuel / propulsion systemNHTSA 11748609
2021 Kia K5Transmission & drivetrainLightsEngine & cooling

The contact owns a 2021 Kia K5. The contact stated that the driver-side turn signal became inoperable. The vehicle was shifting hard and/or not shifting at all. While driving at unknown speeds, the vehicle shut down. The turn signal and brake lights were illuminated. The contact stated there was a recall for NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline). The vehicle was taken to the local dealer for diagnosis of the signal light. The vehicle was repaired, but the failure recurred. The BBB was contacted who filed a claim. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 56,000.

Filed Incident Power train · Exterior lighting · EngineNHTSA 11742131
2024 Kia K5Electrical systemEngine & coolingFuel system

The fuel tank expanded, the car was spitting out gas from where you are supposed to insert gas nozzle. my fuel tank expanded so bad from pressure my vehicle sensors malfunctioned my car did not tell me something was wrong, I heard a pop and my car was telling me I had no gas when I did. the insert area for gas to be pumped was swollen and couldn't shut my gas cap cover. I went to gas station and since my car said it was empty I attempted to add gas and it spit it back out immediately it could not take gas, so I...

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called kia locations since I was in [[redacted]] with kids in my vehicle for halloween trick or treating. the recall papers I have in order says safety hazard was a FIRE. my car fuel tank could had made my car explode at any moment. my engine light did not come on all my car showed me was mile change and inaccurate amount of gas reading. the dealer has had my car since November 2025. I heard popping sounds when I would return home from work in the driveway but no warning. one Time in July of 2025 my engine light came on I went to autozone they gave me a code for something with fuel issue, light didn't stay on no longer than a few hours. kia has cost me so much mishap and unfair financial responsibility. it has been a nightmare. the person working my case I can only talk to in email, it has taken forever now I have a repurchase offer that I had to fight for. they are trying to make me return my rental before completion of repurchase offer which offer stated could take longer than 30 days. this is so unfair. it seems illegal. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Incident Electrical system · Engine · Fuel / propulsion systemNHTSA 11737995

Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data

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