Most common 2021 Hyundai Kona problems
Share of the 120 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Hyundai Kona complaints by model year
Best Kona years: 2025. Years to avoid: 2020. Compare all years →
2021 Hyundai Kona recalls (1)
Engine
Hyundai Motor America (Hyundai) is recalling certain 2019-2020 Elantra, 2019-2021 Kona and Veloster vehicles equipped with 2.0L Nu MPI engines. The piston oil rings may not have been properly heat-treated, which could result in engine damage.
Remedy: Dealers will inspect and, if necessary, replace the engine, free of charge. In addition, Hyundai will deploy Piston Ring Noise Sensing System (PNSS) software. Owner notification letters were mailed August 24, 2021.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2021 Hyundai Kona:
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles.
What 2021 Hyundai Kona owners say
Engine & cooling all 81 →
The contact stated that she was an insurance company claim adjuster who was calling on behalf of an insured consumer, who owned a 2021 Hyundai Kona. The contact stated that while the vehicle was parked and unoccupied, the vehicle caught on fire. The contact stated that there was no warning light illuminated before the incident. The fire department extinguished the fire and filed a report. The contact stated that the insurance company sent an inspector, who determined that the fire originated in the engine compartment. The contact stated that the entire vehicle burned and only the frame remained. There was no injury sustained. There was no police report filed. The vehicle was towed to a salvage yard, where it was totaled. The contact related the failure to NHTSA Campaign Number: 21V301000 (Engine); however, the VIN was not included. …
The contact owns a 2021 Hyundai Kona. The contact stated that while attempting to accelerate from a stop and while driving at various speeds, the vehicle stalled unexpectedly. The vehicle was coasted to the side of the road, and the vehicle was turned off and restarted, and continued driving. The check engine warning light was illuminated. The vehicle was taken to Auto Zone, where it was determined that the spark plugs had failed and needed to be replaced. The spark plugs were replaced; however, the check engine warning light remained illuminated, and the vehicle stalled. The failure had occurred three times; however, the last time, the vehicle failed to restart, and there was smoke coming from underneath the hood. The vehicle was towed to the dealer to be diagnosed. The contact was informed that the turbocharger and the piston rings had failed, and the engine needed to be replaced. …
Transmission & drivetrain
The contact owns a 2021 Hyundai Kona. The contact stated that while driving at an undisclosed speed, the vehicle downshifted unintendedly. The check engine warning light illuminated. The vehicle was able to restart; however, the failure recurred while driving. The vehicle was taken to an independent mechanic, where it was diagnosed that the transmission piston ring had failed. The mechanic determined that the transmission needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 96,000.
While driving up a steep mountain road in heavy traffic and snow the transmission on my Hyundai Kona overheated and failed. The car began to buck back and forth and a transmission light came on. Unfortunately I was on a mountain interstate in heavy traffic with no real shoulder due to snow. I attempted to limp the car to the top but moved towards the right lane in case. The transmission did it's bucking thing 3 times total and then I noticed smoke coming from the powertrain area. At this point I pulled over and put my car basically into a snow bank so as not to get run over by semi trucks. I called AAA but was able to get the car up the hill after letting the transmission cool for around an hour. This entire situation was completely unsafe and had I been informed I would not have purchased the car because I know that I spend most of the winter in traffic on a mountain interstate. …
Electrical system
The contact stated that she was an insurance company claim adjuster who was calling on behalf of an insured consumer, who owned a 2021 Hyundai Kona. The contact stated that while the vehicle was parked and unoccupied, the vehicle caught on fire. The contact stated that there was no warning light illuminated before the incident. The fire department extinguished the fire and filed a report. The contact stated that the insurance company sent an inspector, who determined that the fire originated in the engine compartment. The contact stated that the entire vehicle burned and only the frame remained. There was no injury sustained. There was no police report filed. The vehicle was towed to a salvage yard, where it was totaled. The contact related the failure to NHTSA Campaign Number: 21V301000 (Engine); however, the VIN was not included. …
The contact owns a 2021 Hyundai Kona. The contact stated that while driving at various speeds, the vehicle would suddenly lost motive power and stalled. After restarting the vehicle, the vehicle operated as designed. The contact indicated that the failure had occurred on four occasions while driving. The vehicle was serviced at the local dealer, but the failure was not corrected. The manufacturer was not yet notified of the failure. The failure mileage was 21,400.
2021 Hyundai Kona engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined | Range |
|---|---|---|---|---|
| Electric | Single-speed | FWD | 132 / 108 / 120 MPGe | 258 mi |
| 1.6L 4-cyl turbo | 7-speed dual-clutch | FWD | 28 / 32 / 30 | — |
| 2.0L 4-cyl | 6-speed automatic | FWD | 27 / 33 / 30 | — |
| 1.6L 4-cyl turbo | 7-speed dual-clutch | AWD | 26 / 29 / 27 | — |
| 2.0L 4-cyl | 6-speed automatic | AWD | 25 / 30 / 27 | — |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2021 Hyundai Kona a good car?
Based on 120 owner complaints filed with NHTSA, the 2021 Kona rates average: about as many complaints as a typical year of the Kona at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2021 Hyundai Kona?
The engine & cooling — 81 complaints, 68% of all complaints for this model year. Next are the transmission & drivetrain (14) and electrical system (11).
How many recalls does the 2021 Hyundai Kona have?
There is 1 recall for the 2021 Hyundai Kona, the most recent from April 28, 2021 (engine). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Hyundai Kona?
The best years by complaints, compared at the same age, are 2025. Years to avoid or approach with caution: 2020. See the full Hyundai Kona years comparison.
At what mileage do 2021 Hyundai Kona problems happen?
The median mileage reported in complaints is about 24,000 miles; 59% of problems with a recorded mileage started before 50,000 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.