Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2023 Hyundai Ioniq 6 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2023 Hyundai Ioniq 6. The contact received notification of NHTSA Campaign Number: 24V868000 (Electrical System), and the vehicle was taken to the dealer, where a software update was performed. The contact stated that the vehicle was charged at the residence, and the contact received notification through the Mobile App that the big battery charge was 80 percent. The contact stated that while attempting to start the vehicle, the vehicle failed to start. The vehicle was towed to the dealer, where it was determined that the 12-Volt battery was completely drained and needed to be replaced. The contact stated that the recall remedy was intended to ensure that the big battery charged the 12-Volt battery during a charging session, but the recall remedy had failed to correct the issue as intended. …
The contact owns a 2023 Hyundai Ioniq 6. The contact received notification of NHTSA Campaign Number: 24V204000 (Electrical System) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated that while attempting to charge the battery, the recharging system did not recognize that the vehicle was plugged into a charging station. The contact stated that the vehicle indicated "Charging Unsuccessful" and the contact had to connect and disconnect the charging cable several times until the vehicle was successfully charged. Additionally, the contact stated that the "Service Required" message was displayed along with a countdown for days remaining for the repair. …
The contact owns a 2023 Hyundai Ioniq 6. The contact had received a notice of NHTSA Campaign Number: 24V868000 (Electrical System), and the vehicle was taken to the dealer, where the Integrated Charging Control Unit (ICCU) software update was completed. The contact stated that while driving 50 MPH on the highway, the vehicle stalled. The contact was able to pull over to the shoulder of the road. It was unknown whether a warning light had illuminated. The vehicle failed to restart and was towed to the dealer, where it was diagnosed that the Integrated Charging Control Unit (ICCU), and the 12-Volt battery had failed and needed to be replaced. The dealer ordered the parts. The contact stated that the recall remedy had failed to correct the safety issue. The vehicle was not yet repaired. …
The contact owns a 2023 Hyundai Ioniq6. The contact stated that while driving approximately 20-30 MPH and attempting to use the horn, the contact discovered that the horn was inoperable. There were no warning lights illuminated. The vehicle was taken to the local dealer where it was determined that the horn needed to be replaced. The vehicle was repaired, but the failure recurred. The dealer failed to pre-order the part for the repair. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 12,500.
I have a 2023 Ioniq 5 that was purchased in June, 2023 and an 2023 Ioniq 6 that was purchased in April, 2023. I had a new Chargepoint Home Flex charger installed in April when I purchased my Ioniq 6 and set the charging current to 40 amps. The charger was hardwired directly to my service panel with the appropriate 6 gauge wire and 60 amp breaker. My Ioniq 6 reliably charged at 40 amps until early July when it started dropping the charge rate to 23 amps about 40 minutes into my charging session when using the level 2 charger at home. My Ioniq 5 only charged at 40 amps for the first week of ownership before starting to drop the charge rate to 23 amps. When this behavior started I plugged an OBD2 scanner in and was able to monitor the AC Charging Inlet temperature and noticed that the charge drop happened when the temperature reached 240F. …
The shift-by-wire system failed while the vehicle was being parked. The vehicle would not shift out of Drive; repeated attempts to engage Park resulted in Neutral only, with a "PARK malfunction. Engage parking brake when parking vehicle." warning displayed in the instrument cluster. Because this vehicle requires Park to be engaged before it can be powered off, the vehicle also could not be turned off. I was trapped with an energized vehicle that could not be secured in Park or shut down for approximately 30 minutes. A red 12-volt battery warning lamp was illuminated in the instrument cluster during the event (photo attached showing the malfunction message, Neutral gear state, and battery warning lamp). I secured the vehicle using the electronic parking brake. …
In November of 2025 the vehicle displayed a "Check Eletrical System" error message. Shortly thereafter the vehicle decelerated to under 10mph as we were turning into traffic. We were able to drive it home (less than 1mi away) and then called the Dealership. The car was then towed to the dealer (but needed a jump as the 12v battery had drained). The dealer diagnosed a failure of the ICCU and replaced it. The vehicle was in the shop for approximately 2 weeks. More recently, on May 3rd of 2026, the vehicle experienced a complete deceleration as it was traveling through an intersection. No error lights or warning messages were displayed. I was only able to partially clear the intersection before the vehicle came to a complete stop. At this time the vehicle would not allow itself to be put into neutral so I could not push it out of the intersection. …
iccu unit battery problem car will not start or cannot turn off engine no problem with car until dealership in a recall appointment upgraded software instead of a total replacement of the iccu unit as in directed in the recall in June 2023 The initial problem began1 in July 2023 replacement of recall of unit was not done by dealership simply installed new software recurring problem on 8/2023 Problem arose 3 weeks after the upgrade, the correction in July resulted again in a failure 3 weeks later on [redacted] danger to drive car is an Ionq6 Hyundai I believe there are many similar incidents as mine that have been reported to you Dr [redacted] email [redacted]
January 28, 2026 The vehicle has stopped in the middle Of the street with sign loss of power, check your battery or something like that and after few attempts to turn it off and on it went to Accessory mode. After 15-20 minutes it completely died. So unsafe with kids in the car during extreme cold temperatures. Free Hyundai road assistance- quoted me 3 hours or so, i had to pay for towing elsewhere. No doubts its iccu, since tow truck driver attempted to jump start and from dead it went to accessory mode and died again almost instantly. I read on the Facebook about iccu problem of Hyundai, if this is engineering defect it should be remedied.
ICCU failure. EV car flashed battery issues and could not drive. ICCU and 12 volt battery replaced after 10 days in dealership shop. Manufacturer inspected. Prior to issue electric hatchback closed half way then stalled. I drove to the dealership and asked them to check if there was something wrong. They closed the hatch manually and said the 12 volt battery was fine and the computer said something blocked the closure, I left the dealership and made it less than a mile before battery light went off (within 5 minutes of leaving dealership). Made it back to dealership in turtle mode and this time computer said the ICCU failed.
Related recalls
Electrical system › Propulsion system › Charging › Port
Hyundai Motor America (Hyundai) is recalling certain 2023-2025 IONIQ 6 electric vehicles. The charging port door panel may detach.
Remedy: Dealers will apply an adhesive on the charging port door assembly, free of charge. Owner notification letters were mailed beginning October 10, 2025. Owners may contact Hyundai customer service at 1-855-371-9460.
Electrical system › Propulsion system › Charging › Module › Software
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2025 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-volt battery, which can result in a loss of drive power.
Remedy: Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge.
Electrical system › 12V/24V/48V battery
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2024 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-Volt battery, which can result in a loss of drive power.
Remedy: This recall is replaced by NHTSA recall number 24V-868. Vehicles already repaired under this recall will need to have the new remedy completed. Dealers will inspect and replace the ICCU and its fuse, as necessary.
Electrical complaints in other Ioniq 6 years
Frequently asked questions
How common are electrical problems on the 2023 Hyundai Ioniq 6?
NHTSA has 33 complaints about the electrical system of the 2023 Hyundai Ioniq 6, 59% of the model year's 56 complaints. The component named most often is horn (2 mentions).
Is there a recall for 2023 Hyundai Ioniq 6 electrical problems?
Yes — NHTSA recall 25V-606 (port, Sep 11, 2025); NHTSA recall 24V-868 (software, Nov 18, 2024); NHTSA recall 24V-204 (12v/24v/48v battery, Mar 15, 2024). Recall repairs are free at authorized dealers.
At what mileage do 2023 Hyundai Ioniq 6 electrical problems start?
Half of the complaints with a recorded mileage happened before about 14,000 miles, and 75% 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.