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Kia K5 Engine Problems

187 owner complaints filed with NHTSA across 5 model years.

Complaints by Year

Worst year: 2021. Best year: 2025.

Owner Reports

A representative sample of complaints filed with NHTSA.

Engine · 2022 4

Engine failed for literally no reason and started smoking and Lia won’t stand by warranty either

Engine · 2025 4

The contact owns a 2025 Kia K5. The contact stated that the engine made an abnormally loud sound while driving and idling. The vehicle was taken to the dealer several times, but the failure could not be duplicated. The vehicle was taken ...

Engine · 2022 4

On December 28th 2022 between the 6:30 am to 8:00 my car was parked and caught on fire. I have filed a complaint with Kia and since then I have gotten the run around about them looking into the vehicle and seeing what cause the issue. My...

Engine · 2022 4

I was traveling normally, exiting a highway ramp when my car acceleration system malfunctioned. It seemed as if it was a power train issue or engine issue. I was not able to accelerate or slow down properly due to this malfunction and it...

Engine · 2022 4

The contact owns a 2022 Kia K5. The contact stated that while driving 60 mph, she struck two deers that jumped into the roadway. No safety object detection was activated during the failure. The vehicle went to the left and right and stal...

Engine · 2021 4

VEHICLE WAS STOPPED A RED LIGHT ON A CITY STREET WHEN SUDDENLY CUT OFF. SMOKE BEGAN TO POUR OUT FROM UNDER THE HOOD. LESS THAN 1 MINUTE LATER THE VEHICLE WAS FULLY INVOLVED UNDER THE HOOD OF CAR. CAR WAS A TOTAL LOSS. VEHICLE HAD JUS...

Engine · 2023 3

I am submitting this complaint regarding a serious safety defect involving my Kia K5 and the subsequent handling of this matter by Kia America. My vehicle was subject to a voluntary recall and was inspected by an authorized Kia dealershi...

Engine · 2023 3

The contact owns a 2023 Kia K5. The contact stated that while driving at an undisclosed speed, there was a fuel odor inside the vehicle. Occasionally, the low fuel warning light was illuminated. While attempting to refuel the vehicle, ga...

Engine · 2023 3

In June 2025, while driving my 2023 Kia K5 (VIN: [XXX] ) at highway speeds on [XXX], the fuel tank suddenly imploded. A loud bang caused the rear seats to lift, startling me and my passengers. The car lost power, and braking too hard ris...

Engine · 2021 3

The contact owns a 2021 Kia K5. The contact stated while her daughter was driving 60 MPH, there was an abnormal sound coming from the engine, when the gas tank expanded, and the back seat popped up. The contact stated that two teenagers ...

Engine · 2023 3

The contact owns a 2023 Kia K5. The contact stated that while driving at 65 MPH in hot weather, a loud popping sound came from underneath the vehicle. The vehicle lost motive power. The check engine warning light was illuminated. The co...

Engine · 2023 3

I was driving and it was a loud noise. My son flew up with seat belt on hit his head on roof , gas tank blew up / or swelled up and my back seat is sitting about 10-12 inches above then normal. Very scary and worried

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