While driving at highway speed, the vehicle suddenly shifts to a lower gear, slowing it down violently enough to knock items out of the cupholder. It then displays an warning light and refuses to accelerate. The only way to fix the problem is to turn over and shut down the car to reset everything.

- De Soto, KS, USA

Chatter or transmission slips from full stop only when engine reaches operating temperature. Does not seem to happen when cold. Vehicle was serviced by Hyundai dealership and said it could be a software fix. They updated software but still have problem. My brother was an auto mechanic and suggested the problem could be related to the transmission oil pump and or defective parts associated with clutch..

- Cave Creek, AZ, USA

This is my 2nd Hyundai Kona - the first had slippage in the DCT (dual clutch transmission) which the dealer adjusted for me. It continued to happen if I accelerated quickly and was part of the reason I traded it in. The second had no issues until 115k miles at which point the DTC smelled bad once, then sounded bad the next day. I called the dealer and made an appointment to have it inspected/evaluated and it died minutes later, before I got it to them. Online forums state that while there has been no recall issued yet, the Konas with the 1.6l turbo are susceptible to DCT issues, particularly in the 2019s and that several dealers are replacing parts free of charge when the vehicle is in for maintenance. Because mine exceeds the 100k warranty, I am being told that I will need to pay for the repairs. This is my only complaint about an otherwise fantastic automobile!

- Golden, CO, USA

Hyundai has failed to replace the battery after more than a year.

- Takoma Park, MD, USA

The car has been recalled because incidents worldwide of the high voltage battery catching fire and/or exploding. Supposedly Hyundai is going to replace the batteries in affected cars, but to date has NOT done so.

- Columbia, MD, USA

4/7/21 while in Las Vegas parked at the Venetian Hotel, my 2019 Hyundai Kona EV battery failed causing the vehicle to be inoperative. I am still waiting for Hyundai to replace the recalled EV battery

- Irvine, CA, USA

During regular driving the vehicle loses power, will not accelerate and stalls out completely. After sitting a few minutes the vehicle will restart. The vehicle was taken to the repair shop but nothing seemed wrong. Within a six month period it again occurred twice. Once again nothing was observed wrong with the vehicle but the second time last night the car was brought to the repair shop and they stated the engine has little to no compression. The vehicle is currently awaiting a diagnosis from hyndai

- Medford, NY, USA

A couple hundred miles after purchasing a new Kona, I had started having acceleration issues going from a dead stop into first gear.as the car starts to go, this is under 5 mph, the car then hesitates as if someone is hitting the brakes. I have almost been rear ended several times due to this. It is a sporadic issue. I have had it into Hyundai 3X now for this. All 3 X Hyundai states they can not repair unless it happens while test driving. Of course this has not happened. So they have " reset" my driving computer 2X hoping it will stop. This is a serious issue and there are many Kona owners out there documenting this issue on blogs. I have 3 service reports claiming there is an issue, but it is not being found. I have written to Hyundai to open a case report. I am reporting this to the NHTSA T with hopes of either resolving this issue or bring light to a potential safety hazard from Hyundai. Thank you, [xxx] redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Clearwater, FL, USA

The contact owns a 2019 Hyundai Kona. The contact stated that while driving 70 mph, the vehicle stalled with the forward collision avoidance warning light illuminated. The vehicle was restarted. The contact stated that the failure recurred after driving for 30 minutes. The vehicle was taken to lia Hyundai albany located at (945 central ave, albany, NY 12205) where the technician was unable to provide a cause for the failure. The contact was informed to take a picture when the failure recurred. The contact was concerned about attempting to take a picture while driving should the failure recur. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 2,000. The VIN was unavailable.

- Hundson, NY, USA

When I come to a slight uphill incline, slow down without fully stopping, and then attempt to accelerate, there are times when the transmission feels as if it is in neutral. The engine will rev up to approximately 2000 RPM but the vehicle will not accelerate for approximately 1 second. Then all of a sudden, the car will accelerate forward at a rapid pace. It seems as if the transmission is in between gears and the transmission then suddenly realizes that it needs to accelerate and then will accelerate usually at a fast pace. The feeling is that of a manual transmission when the clutch is released while the engine is at a higher RPM. My car has the traditional 6 speed automatic and not the dual clutch transmission. This is an intermittent issue and the car was brought to the dealer's service department. The tech stated that the transmission was working fine and there were no new software updates for the transmission.

- Bethel, CT, USA

When leaving home the vehicle had little acceleration and poor shifting. Took too much time merging into traffic. After contacting the local dealership the problem cleared up as it had done before. Drove to the local Hyundai dealership. Obdii code read P0193.

- Burlington, NC, USA

Car at times will not accelerate from a stop for 2 to 3 seconds after acclerater is push.

- Levittown, NY, USA