Hyundai Kona electrical problems

ELECTRICAL SYSTEM

I was driving the speed control panel completely gets blackout for a few second and come back ( dash board ) it happened five times so far and the car is 37,000 MI

NHTSA complaint #11756933 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Dear Hyundai Motor America Consumer Affairs, My name is [XXX], and I am submitting this correspondence as a formal safety and customer-service complaint concerning my 2023 Hyundai Kona SEL, the recurring failure of its horn, and the treatment I received at Capitol Hyundai in San Jose, California. I am requesting that Hyundai Motor America immediately open a corporate case, investigate the dealership’s handling of this matter, preserve all relevant records, and provide me with a written resolution. This complaint involves an unresolved vehicle safety concern. My vehicle’s horn has failed repeatedly. I previously presented the vehicle to Hyundai for this same horn issue in 2024. One of those visits was properly documented. I subsequently returned regarding the horn again, and the horn was made operational; however, to the best of my knowledge, that subsequent visit and/or work was not properly documented in my service history. The horn has now failed again. A functioning horn is an important vehicle safety device. Without it, I cannot reliably warn another driver, cyclist, pedestrian, or other road user when immediate warning may be necessary to avoid a collision. On August 11, 2026, I brought my vehicle to Capitol Hyundai, 1050 Capitol Expressway Auto Mall, San Jose, CA 95136, seeking assistance with this recurring problem. What occurred is particularly concerning because Capitol Hyundai’s own Repair Order documents the situation. The Repair Order states: “CUSTOMER STATES HORN IS NOT WORKING PLEASE CHECK AND ADVISE” and also states: “DEALERSHIP IS REFUSING TO SERVICE CLIENT DUE TO CUSTOMER ISSUE.” I am attaching a copy of this Repair Order. Therefore, there should be no dispute that Capitol Hyundai had actual written notice on [XXX] that I reported an inoperative horn and that the dealership documented its refusal to service me. Instead of resolving the safety concern, I left without the horn being repaired. I was also told that the dealership would INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT

NHTSA complaint #11756321 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

While driving at night the entire electrical system went out for a few seconds. Headlights out, dash full out, then after a few seconds it came back on. Just like this issue: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11754714 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

COMPONENT/SYSTEM: Air Conditioning (HVAC) / Climate Control System and closed-loop refrigerant lines. The vehicle and all climate control components are available for immediate inspection. SAFETY RISK: Total loss of cooling in peak summer heat (90°F-95°F+) causes cabin temperatures to rapidly exceed 110°F. This sudden heat trapped in the vehicle caused me (the driver) acute heat exhaustion, culminating in a medical fainting episode. The vehicle regularly transports my newborn baby and toddler, subjecting them to severe heatstroke risks. Additionally, an ongoing 4-year chemical refrigerant leak inside an enclosed EV cabin creates an active toxic inhalation hazard for all passengers. DEALER CONFIRMATION: Yes. The failure has been repeatedly confirmed and documented by authorized Hyundai dealerships, including Paramus Hyundai, Garvey Hyundai, and Liberty Hyundai. Technicians repeatedly measured zero refrigerant charge/pressure, performed UV dye tests, and completed major repairs including AC line and radiator rebuilds without resolving the leak. INSPECTION HISTORY: Yes. Inspected multiple times by authorized Hyundai dealership technicians under official Corporate Case Nos #42549212, #41020884, and #23781133. WARNING LAMPS/SYMPTOMS: No dashboard warning lamps or error messages ever appeared. The only symptom was the AC suddenly blowing boiling hot air as refrigerant leaked out. This failure first appeared in Summer 2022 (shortly after vehicle purchase) and has recurred every summer for 4 consecutive years despite repeated warranty repair attempts.

NHTSA complaint #11753892 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

The car shuts off at random times during me driving . Its like the car locks up steering and shuts completely down . Have to pull over and give the car time . And it shuts back on in and drives with poor accelerate after each issuse. The car is now shaking and making popping sounds while driving .

NHTSA complaint #11752393 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM:HORN

The contact owns a 2021 Hyundai Kona. The contact stated that while driving at an undisclosed speed, the horn button was depressed but was inoperable. The dealer was contacted and notified of the failure. The contact was informed that the horn needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.

NHTSA complaint #11752233 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

While I was driving, my car turned off and on again while the car was in motion. I wasn't in an accident, but I did notice the headlights turn off, my dashboard turn off, and a red light appear on the dashboard before the car turned itself back on.

NHTSA complaint #11752258 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Vehicle (2019 Kona) is subject to Recall 203 (piston ring/bore defect). On XXX Puente Hills Hyundai refused the mandatory physcial inspection, instead attempting to charge $1,100 for 'leak repairs.' An independent inspection by Valvoline on XXX confirmed the engine is dry with no leaks, proving the dealer's claim was fraudulent. Following a recent ECU update, the vehicle triggered a P0420 code—a known symptom of the internal engine damage covered by Recall 203. My Hyundai Corporate Case (#XXX) is currently stalled as the dealer refuses to provide technician notes or perform the safety inspection. I am operating an unsafe vehicle with documented internal mechanical failure. Requesting immediate intervention for a physical cylinder inspection. Please refer to the attached document (SUMMARY OF EVENTS) for the full chronology, supporting evidence, and email correspondence related to the dealership's refusal to perform Recall 203. See attached PDF (Evidence_Email_Correspondence) for documentation of the dealership's refusal to provide technician notes and their unprofessional communication regarding this safety recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11742104 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

The vehicle prompted an update that needed the emergency parking brake engaged. Once updated, the parking break light goes off but the parking brake does not disengage. Can no longer move the car until the electrical issue is fixed.

NHTSA complaint #11740059 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

While driving my 2024 Hyundai Kona on the freeway on May 22, 2026, at approximately 9:30 AM, traveling around 75 mph, my vehicle suddenly displayed a forward collision warning on the dashboard even though there was no vehicle, object, or road hazard in front of me that would justify emergency braking. Immediately after the warning appeared, the vehicle’s automatic emergency braking / forward collision avoidance system activated on its own, causing the car to brake abruptly and rapidly decelerate in active freeway traffic. This created an extremely dangerous situation because vehicles behind me were traveling at freeway speeds and could have rear-ended me, potentially causing a serious multi-vehicle collision resulting in serious injury or death. I had no warning prior to this event, no dashboard warning lights, service messages, or other symptoms indicating a problem with the system. The suspected failed component is the forward collision avoidance / automatic emergency braking system, and the vehicle is available for inspection upon request. The issue has not yet been reproduced or confirmed by a dealership or independent repair facility, and the vehicle has not yet been inspected by the manufacturer, police, insurance representatives, or others. My best assessment is that the system falsely detected a collision risk and activated emergency braking without cause, creating a severe highway safety hazard.

NHTSA complaint #11739689 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

The vehicle trunk doors pops open. This has been happening for several months. We’ve taken it to the dealership. They said that it was not covered and there has been no recall on this, but it’s still happening and it’s very dangerous. It’s happened on the freeway on the back roads at night it doesn’t matter it just when it feels like it wants to open up it beeps loudly and light comes on the dashboard as something is wrong and It will just pop open.

NHTSA complaint #11738915 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Coke spill in cup holders caused a leak to the wiring harness below the center console. It drained the battery, shut down all of the buttons on the steering wheel and shut the infotainment system down. It finally died and had to be towed to Vann York Hyundai in Highpoint NC. They told me that because it was cased by an outside influence it's not covered by the warranty and estimated $800 labor for repair. The leak is a defect.

NHTSA complaint #11736844 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

The vehicle experienced a total electrical failure while driving. Dealer diagnosed the issue as a loose fuse box connector/power distribution connector. The vehicle and repaired component should be available for inspection through the Hyundai dealer service department. The vehicle suddenly lost all power while being driven on a public roadway. The engine shut off, dashboard went dark, and power steering assistance was lost, creating a risk of collision and leaving the vehicle disabled in traffic. A Hyundai dealer diagnosed and confirmed that a loose fuse box connector caused the loss of power. The vehicle was inspected by an authorized Hyundai dealer service department. No police or insurance inspection was performed. No warning lights, messages, or symptoms appeared prior to the failure. The vehicle lost power suddenly without warning while driving.

NHTSA complaint #11736013 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

On two separate occasions while in drive and accelerating, the car display indicated an “engine has been turned off, move to park” error. The car automatically went into neutral and I lost all control of acceleration until I came to a full stop, put it in park, and turned off the car.

NHTSA complaint #11731640 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

- While driving, everything electrical turned off (engine stayed on) for approximately 3 seconds including headlights, navigation, dashboard containing speed, music, etc. - This occurrence happened during the daytime, so there was no danger; however this has also happened to me at night a year ago, causing me to lose all vision at 40 MPH which was a major safety risk. - This problem has occurred with others [XXX] ) and Hyundai has not acknowledged it or been able to reproduce it, simply returning the vehicle to people who bring it in. - My vehicle has not been inspected, as from others' experiences it sounds like this issue does not register as an error code and would be a waste of time with no action from Hyundai. - There are no other issues with my vehicle in terms of warning lights or messages. I have frequent oil changes and have only driven this car 6,000 miles. It was bought brand new in 2024. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11730654 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Much like in the NHTSA bulletin concerning 2024-25 Hyundai's Santa Fe, Santa Cruz, and Tuscan, my 2024 Hyundai Kona SEL has a glitching/flashing infotainment screen. Perhaps it is due to the Coaxial shield as in the bulletin for other same model years Hyundais. The screen flickers and the pace at which it flickers and becomes static-y increases, and eventually turns all snowy and sometimes goes blank. A simple pushing of the reset button does not fix the issue. It is distracting, and dangerous, especially if one is relying on the maps for guidance, because there is no way to get the screen to stop the glitching when it occurs. But, it is very random when it happens. Maybe once out of every 10 drives. Seems to be an issue with other drivers with the same 2024 Hyundai Kona.

NHTSA complaint #11728210 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM:HORN

The contact owns a 2023 Hyundai Kona. The contact stated that the horn was working intermittently. The horn occasionally operated but had become permanently inoperable. The dealer was notified of the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 106,000.

NHTSA complaint #11726817 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM:12V/24V/48V BATTERY

The contact owns a 2024 Hyundai Kona. The contact stated that while the vehicle was parked and turned off, the vehicle failed to restart. There was no warning light illuminated. The vehicle was jumpstarted by AAA Roadside Assistance to start the vehicle. The vehicle was taken to the dealer, but the vehicle was not diagnosed or repaired. The contact replaced the battery. The manufacturer was made aware of the failure. The failure mileage was approximately 13,200.

NHTSA complaint #11723236 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

I have a 2025 Hyundai Kona Limited. On [XXX], around the afternoon on Sunnyvale, California, while exiting [XXX] headed to Lake Tahoe, the liftgate bolt that attaches to the body had buckled mechanically as the system did not back away when a flashlight that came out of a travel bag was blocking the way to have it closed. The car computer thinks the liftgate is open even though the lock is secured. The car computer allows to drive without seatbelts secured or closures ajar for a few seconds at low speed but then it automatically with little warning engages the electronic handbrake while driving. I was driving on a highway in a middle lane when the car engaged without my consent the electronic handbrake locking the wheels and I almost got rear ended and killed by a semitruck. I had to floor the gas pedal and steer to a shoulder to request a tow. Since it was a long weekend before Presidents Day, I had the car taken to the nearest dealer in Modesto California. Their service department invented a lie that due to a side crash, which was a failure of the collision mitigation system that happened months ago, is the cause and that it is my fault even though the driver admitted responsibility but it is an unrelated issue. There should be a way of overriding the car computer so it does not engage the electronic hand brake on the middle of the highway, specially at night as this creates a road hazard that can lead to death. I replicate the issue with a rental, a Hyundai Tucson, they use the same gas strut and bolt that in my opinion has a very narrow gage. As you can see in the picture, the passenger side bolt is fine, the driver side is buckled. The side accident that happened on May 2025 was on the passenger side but the liftgate is fine; at any rate both sides should be deformed not just one if that were to be the case but it is not. Dealer and Hyundai attempting to sideline the issue to avoid a warranty and recall in my opinion. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11721002 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

A week after I got my 2025 Hyundai Kona Limited, while trying to have the moonroof when headed into the highway since it gets too noisy if left open, the glass will touch the guard and then back away and remain fully open. However, the issue becomes more serious when it starts to rain or snow as it will remain open. In three occasions, the moonroof will not close. During a downpour, I had to use a large umbrella to avoid water to flood the car. Had I not had an umbrella or something to prevent water from getting in, the vehicle electronics could have become damaged including my personal belongings including but not limited to my sensitive medical equipment. Had I been in a snow shower, I will have gotten sick with a cold. I had reported the issue several times to different dealers and they only say it needs to be cleaned and reset. I had a Sonata with the same moonroof for over three years and I never experienced such an issue.

NHTSA complaint #11721007 — an unverified report by a vehicle owner.