2023 Kia EV6 Problems, complaints & recalls

The ICCU failed. I wasn't able to charge using an AC charger. When I plugged in an AC charger, it tripped the breaker. The dealer replaced it under warranty.

My 2023 Kia EV6 was subject to recall SC327 (NHTSA 24V-867, ICCU); the recall remedy on Nov 19, 2024 was an inspection and software update only. After the remedy, the car repeatedly lost all 12-volt power (Feb 2025 and Apr 2025). Each time, the dealer said it could not find the cause - its hands were tied, it said, because Kia corporate required a diagnostic code and some codes did not yet exist for a car this new - and it repeatedly replaced parts, including the 12V battery twice and the battery sensor, to "hope...

Vehicle failed to start and a jump is required to start the vehicle for the first time on 10/6/2026. This has now happened numerous times and at times when the vehicle's power train batteries are charged. An small portable charging device has been purchased to jump the vehicle which eliminates the need to call for roadside assistance. Roadside assistance has take over 2 hour to response. An error on the dash indicated the 12 Volt battery has lost charge. There is a red circle message displayed on the dash. The vehicle was taken to Batteries Plus and a battery and alternator test. No problems were noted. The vehicle is scheduled for a dealer inspection on 10/22/2026.

The ICCU on the car died in the middle of the street, car would not shift out of park. Car completely died after a few minutes.

I was driving in heavy rain on a busy highway (I4) and the lane assist pulled me off the road to the road hand side and then cut across all lanes of traffic to the left hand side. It also engaged emergency braking going forward when there was no reason to do so. Many times when I am backing up, it's engaged emergency breaking when there is no risk of collision. Finally, the front sensors are very inconsistent with when they go off. Today I was not moving and neither was the car ahead of me, first it told me I was...

I charged my car at a level 3 fast charger on a road trip. After completing my charge, the AC stopped working. The fan worked but it was only blowing hot air. Normally this would be a nuisance, but the day was about 114 degrees and the car's interior was probably close to 140 degrees. I was driving on the interstate so it was very hard to keep the windows down. The lack of HVAC made the car difficult to operate and if my family was in there would have been a safety hazard. I took it to the dealer who initially...

ICCU failure. I charged overnight at my home L2 charging as usual. I backed out of my garage and heard a loud pop. Almost immediately an "check electrical" warning came up. The car went to turtle mode and then completely died. The car was towed and I was informed the ICCU needed to be replaced. The car had all previous checks on ICCU performed (per mailed recalls) and was updated and passed each time.

While driving southbound on the [[redacted]] in a rented 2023 Kia EV6 from The Hertz Corporation, picked up in [[redacted]] on [redacted], the vehicle entered "Power Limited" mode without warning. The vehicle lost normal propulsion and decelerated from highway speed to a crawl, forcing 4-5 emergency stops onto the highway shoulder over several miles while semi-trucks passed at 70+ mph in live traffic, with two minor children in the vehicle. The vehicle was ultimately abandoned at a highway rest stop on Hertz...

While driving a rented 2023 Kia EV6 on the freeway, the vehicle lost power and shut down completely, without warning, on multiple separate occasions during a single trip. This occurred at highway speed in live traffic, creating a serious risk to vehicle occupants and surrounding traffic. The vehicle was a rental (Dollar Rent A Car); no external damage or collision was involved. The vehicle has since been towed.

ICCU failed and replaced under warranty

First ICCU the power completely went out on 2/23/26. Power went out again April, 2026. Currently car is immobile and unreliable and not safe for driving due to power failures. Towed car to Kia Cerritos. Car supposedly "fixed" (with other issues I've reported to KIA of America & CA BAR/DMV) Currently 12V battery is not holding charge as of 4/27/26, 4/28/26, and 5/2/26. I received a letter from KIA stating ICCU and inability to charge, Keep this Letter in your Glove Box for a free diagnosis and possible no cost...

ICCU failure, a well known issue with these cars.

Iccu failure with Kia ev6. Unreal that this car has not had a recall yet. It is totally unacceptable that this car can at any time fail. Car will not start and shut down while I was driving. Luckily I was beginning to park when it happened

The ICCU unit failed. The message "Check Electrical System" appeared on the instrument cluster. Low-voltage battery voltage was 12.0V and vehicle speed was limited to 60 mph. Maximum speed was gradually reduced to 30 mph over a period of 40 minutes (voltage was 11.5 V) with minimal 12V loads. I pulled over and called a tow truck to the nearest service center. Kia confirmed the ICCU was defective and replaced the part under warranty.

ICCU failed despite all prior recall updates being performed. Incident began when home circuit breaker tripped; vehicle subsequently refused Level 1 charging with "Check Electrical System" warning. Per dealer suggestion, tested public chargers. Level 3 (DC) worked, but upon connecting to Level 2 (AC/J1772), a loud "pop" occurred, and the public charging station immediately suffered a mechanical failure/shutdown. Vehicle then displayed "Stop vehicle and check power supply," and was unable to drive above 40mph (with...

My vehicle has been in the possession of Koons Kia of Owings Mills since March 15, 2026, for diagnosis and repair of this issue, with service beginning March 16, 2026. During this time, the dealership has replaced the 12-volt battery and performed a software update; however, the defect has not been corrected. On April 10, 2026, I was notified that the vehicle was ready for pickup. When I arrived on April 11, I found that the battery was completely discharged and the issue had not been resolved. Because the vehicle...

*ICCU assembly and ICCU fuse fault (a kia recall SC327( NHTSA ID: 24V867000) for ICCU was performed months early but does't help AND iccu crash) *yes - cars stop workind in the midle of nower at 317 mile away from home with 5 persons in) *yes ( kia already performed recall SC327 for our car but doest help and the ICCU crash) *yes *yes-vehicle broke down while driving.Had to be towed to closest Kia dealer(the incidend hapened 317 miles away from our home Dacula GA 30019)

ICCU on my Kia EV6, this is a known issue, shouldn't be bound by miles, as it's not a mileage issue or concern! The warning was Stop Vehicle Check Power Supply!

Got in my car to leave a store and heard a loud pop and noticed a smell like an electric motor burning. Backed out of my space to drive home and the car displayed several error messages- Check electric vehicle system, turtle mode, power reduced. I was stranded and had to order a tow truck to be towed to the dealer and get a ride home.

Repeated failed attempts to repair ICCU culminating in ICCU failure. May 15, 2024 - Initial repair attempt (ICCU-related recall/service). September 5, 2024 - VCMS logic recall performed. December 19, 2024 -second repair attempt for ICCU-related issue. October 16, 2025 - Limp-home logic recall performed. March 11, 2026- Vehicle experienced a complete loss of power and was rendered undrivable. Repeated attempts to avoid ICCU failure still resulted in said ICCU failure and a loss of propulsion event while vehicle was on the road.

Vehicle charging. When charging at home or public charging stations. It sometimes automatically shuts off before it gets to limit set.

I was driving 40mph and received a yellow error message along the lines of "electrical system issue, please check" and my speed was limited to 25mph. After trying to get the car to a safe location (as I was on a narrow two-lane road), the error changed to a blinking red error and my speed was further limited to 12mph. I was unable to get the car one mile to the dealer for service, so I stopped the car in a parking lot and had it towed to the dealer. The dealer diagnosed the problem and replaced the ICCU (2nd time on this car) and the 12 volt battery.

My (EV6) failed to charge on both Level 1 and Level 2 charging. A "Check Electrical Vehicle System" message appeared on my dashboard. I took my vehicle to my nearest dealership, where the technician confirmed a faulty ICCU. Fortunately, my vehicle was drivable, and this failure occurred at home rather than on the highway, which could have been a significantly more serious issue. A part has been ordered, and the vehicle has been in the shop going on two weeks.

ICCU failure

ICCU Failure. It's been replaced by Kia under warranty. Initially Level 2 charging failed multiple times. Luckily mine didn't die on the road, but it very well could've like others reported.