Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Kia Forte owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2021 Kia Forte. While driving at various speeds, the check engine warning illuminated. The vehicle would start to vibrate. The vibration was more evident while slowing down or stopping at traffic lights. The vibration and the warning light had become a recurring failure. After turning off and restarting the vehicle, the check engine warning light was cleared. However, lately, turning on and restarting the vehicle failed to clear the warning light. Additionally, the vehicle lost motive power and stalled several times. While the vehicle was stopped and idling, the RPM was fluctuating as if the accelerator pedal was depressed. The vehicle was taken to the same dealer several times; however, the dealer was unable to duplicate the failure. The contact was advised that the vehicle was in good working order. The vehicle was not repaired. …
The contact owns a 2021 Kia Forte. The contact stated while driving 65 MPH, there was an abnormal rattling sound coming from the engine compartment before the vehicle lost motive power. There was no warning light illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the cylinders and pistons had failed, and the engine needed to be repaired or replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 93,532.
My Kia forte 21 that I owned for less than 2 years, stalled out while driving on 20 April 23. The engine light came on. I checked the oil and there was none , despite having regular maintenance being performed. No light indicators appeared informing me that my vehicle had no oil left. My vehicle had 21,234 miles when the engine failed. Kia has yet to contact me or assist me with this matter. I could've possibly died while driving on the highway and my car randomly stalling out.
I purchased this care new, and the manufacture did not disclose that the vehicle was NOT made with an engine immobilizer, or any theft prevention outside a basic door lock. (Kia Hyundai Vehicle Theft Marketing, Sales Practices, and Products Liability Litigation, No. 8:22-ML-3052 JVS(KESx) (C.D. Cal.). I've already stopped the theft once and scared away the thief's, but now I can't find insurance companies to insure the vehicle. The 2 companies that I did find for insurance, charge 15% of the value of the vehicle for comprehensive and collision coverage. Even with the useless class action lawsuit settlement to upgrade the software, this is NOT stopping the thieves from breaking into the cars, and NOT impressing the insurance companies either as they won't insure this expensive asset. I've never seen so much deception in the automotive industry. …
Driving under normal conditions April 20,2026, on the way to school. Got off the freeway and the vehicle immediately shut-off and the check engine light came on. Vehicle was stuck partially in the roadway and would not move. Vehicle was towed to Kia dealership and they found that there was no oil in the engine and that the oil drain plug was completely missing. This problem caused catastrophic engine failure resulting in the need for a full engine replacement. A routine oil change had been conducted approx. 2,000 miles prior to this on January 12, 2026. The vehicle had been driven daily since that oil change with no noticeable oil leak or problems preceding this event. Had this event occurred at freeway speeds, it could have caused serious injury to the driver and other motorists on the roadway at that time. …
On Saturday, March 1, 2025, I took my 2021 Kia Forte LXS for a routine oil change. I had NO PRIOR issues, warning lights or anything with my vehicle. The oil change was performed. I then drove my vehicle less than 20 miles, the vehicle would then not accelerate and started to bog down. I was able to get my vehicle off the major I-4 interstate, however eventually the vehicle then shut down. The vehicle now will still start however is making this terrible clicking noise. I have had video of the engine running looked at by several mechanics who states the engine is blown. I have contacted Kia who clearly has known engine issues on several of their Fortes however Kia continues to state since mine is not currently on recall, they are not taking responsibility. Kia know they have several recalls due to engine issues. …
My 2021 Kia forte GT is currently sitting in my driveway, undriveable. It started about 3months or so ago I had realized I was getting more and more frequent oil changes to the point where the car would be consuming a quart of oil in at least a week or less. Fast forward to this previous week, I now had a hard knock/rattle within my engine. The engine gave way on my way home which is a significant safety issue to myself and those who were driving around me. I have contacted Kia customer as they have had previous complaints as well as a lawsuit on the engine for the excessive engine oil consumption leading to possible engine failure. There's no reason why an only 4 year old car should have a blown motor. I am thankful that I am personally ok and didn't hurt anyone else while in the midst of driving my vehicle home.
I am writing to report a serious safety concern involving my Kia vehicle. Shortly after getting an oil change, my car began making unusual noises and then suddenly stopped working in the middle of a busy intersection. This unexpected stall created a dangerous situation for both myself and other drivers. After having it towed to the dealership, it comes down to an engine malfunction which was not covered by my warranty since it just hit 70,000 miles. I have since learned that other Kia owners have experienced similar issues, and I am concerned this may be related to a larger defect or recall issue. I wanted to report this incident to ensure it is properly documented and investigated.
Was currently stuck in slow walking traffic and once traffic began to progress the car overheated engine notice appeared. Pulled into a parking lot as soon as car was parked the vehicle turned off. This happened during the night and was an extremely traumatic experience! Car does have a diagnosis about the engine been blown. Still in the works of being fixed by the dealership. Very long process!
Service engine light turns off then comes back on. Get message engine failure. Scanner at dealership scanned 15 codes relating to misfires on all cylinders. Positive battery terminal caked up real bad causing arcing and melting plastic. Last I heard from dealership was possibly a engine replacement.
Engine complaints in other Forte years
Frequently asked questions
How common are engine problems on the 2021 Kia Forte?
NHTSA has 22 complaints about the engine & cooling of the 2021 Kia Forte, 32% of the model year's 69 complaints.
Is there a recall for 2021 Kia Forte engine problems?
No. NHTSA lists no engine & cooling recall for the 2021 Kia Forte, though it has 2 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2021 Kia Forte engine problems start?
Half of the complaints with a recorded mileage happened before about 94,000 miles, and 33% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.