2024 Kia EV6 Electrical Problems

Which parts fail

• Propulsion system › Charging › Module › Accessory
  1

Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).

Owner reports

Selected complaints filed with NHTSA by 2024 Kia EV6 owners, lightly cleaned up (personal details are redacted by NHTSA).

I was driving my car on the highway, then I got the message heck your electrical system'for around a minute. Then there was a rumble or bang as if I hit something with the back, but the road was clean. Then the car started slowing down and I drove to the side. I got out of the car and saw white smoke coming from under the car in the back. I started opening the hood and trunk in the back to find out, where the smoke came from. It was nothing to see. Because it was an electrical car I assumed, that it could start burning, when it smells like smoke and looks like smoke. So I called 911 and told them, that I think my electric car is starting to burn, where I am and that nobody was injured. I took everything out of the car, closed the hood, the trunk and the doors and moved in a safe distance at the side. …

I leased a 2024 Kia EV6 on 1/27/24. On 2/22/24, twenty-six days after leasing the vehicle and an odometer reading of 616 miles, while on Washington state highway 903 there was a pop sound, the car slowed, and stopped displaying a "Check electric vehicle system" error. Due to the pop sound, we pulled over and barely made it off to the side of the highway before losing forward momentum. If this happened on a crowded freeway, the vehicle could have been disabled in a traffic lane. After 39 days, the dealer's service department found that inverter was "burnt and charred showing evidence of a fire in the system" and that the fire "potentially damaged the rear drive unit".

on April 7, 2025, our 2024 Kia EV6 was towed away from our driveway after an ICCU failure the day before. The tow truck driver attempted to jumpstart it with a battery eliminator and he could not. He could not get it shifted into neutral and had to pull it up on the ramp with the back tires stationary, sliding up the ramp. They had it until we got it back just before April 22, and then on that day, it was towed away again because of a 12 V battery failure. If this first computer failure had happened while we were on the highway, we would have lost power in traffic. We were told that the replacement ICCU part which we received was a different model number than the first one, but I have heard on Facebook discussion groups that it is identical and just as likely to have a failure. Our Kia EV6 is a 2024 model, an extended battery version Wind AWD. …

Vehicle Information: 2024 Kia EV6 (VIN: [redacted] ) Mileage at time of failure: 14,005 Complaint Description: My 2024 Kia EV6 experienced a complete failure of the 12-volt battery system despite the high-voltage traction battery showing approximately 80% state of charge. The vehicle became completely inoperable without warning. The 12-volt battery was fully discharged and the vehicle would not enter READY mode. The vehicle required a jump start to become operational. After being jump started, the 12-volt system did not appear to charge properly, suggesting a failure of the Integrated Charging Control Unit (ICCU), which is responsible for converting high-voltage battery power to maintain the 12-volt battery. This failure created a significant safety concern because: The vehicle became completely disabled without warning. …

The driver (my wife) was operating the Kia EV6 (with approximately 10,000 miles) when the vehicle suddenly experienced a severe loss of motive power. While driving, a warning message appeared on the dashboard indicating an issue with the power supply. Immediately after, the vehicle forced itself into "turtle mode," severely restricting the maximum speed to 20 mph and refusing to accelerate further. This sudden, unexpected deceleration on an active roadway put the driver at a significant risk of a rear-end collision. The driver managed to slowly navigate the vehicle back to our residence at a maximum speed of 20 mph, which was extremely hazardous. Shortly after safely parking at the residence, the vehicle experienced a complete electrical failure. …

I've had to have my rental car jumped 3 times now, the check engine light has been on since I rented it, had to be reset and is now back on. I believe it's the 12v battery, it pops up warnings of battery discharge almost daily. All 3 times it was shut off and when I went to start it, it wouldn't turn on, 3 seperate people have jumped it for me now in 3 different locations, the last one being while I was working and had to end the delivery because my car would not start so I am now unable to work as they have paused my deliveries until my account is reviewed. I am putting the first date I noticed the check engine light, which was the day I rented the vehicle. The not starting has happened on the following dates: [redacted] and today [redacted]. I recall noticing the battery discharge warning for the first time around the beginning of Oct, maybe closer to mid October. …

The Integrated Charging Control Unit (ICCU) and High Voltage Fuse failed twice within 100 miles, causing a total loss of motive power while driving. The first failure occurred on Jan 24, 2026 (13,954 miles), and the second on Feb 2, 2026 (approx. 14,000 miles), immediately after the first repair attempt. In both instances, the 12V charging system failed, severing connection to the high-voltage battery and forcing the vehicle into a "limp mode" with reduced speed and steering loss in active traffic, creating a severe collision risk. The first authorized manufacturer technician stated that the issue was with the 12v battery and not the ICCU, however the second dealership confirmed that the issue was the ICCU all along, resulting in 17 days out of service. …

I had just finished charging the vehicle overnight on a Level 2 charger at a family members home. After leaving the driveway and driving a few hundred feet, an error message showed on the vehicle screen saying "Check Electric Vehicle" system, and then later a second message that said to stop the vehicle. I immediately turned the car around parked it in the driveway again and called roadside assistance to have it towed to the Kia service center. The Kia service center confirmed that it was an ICCU (integrated charging control unit) failure, which they replaced 4-5 days later after ordering the part. These error messages were the first and only indicator of the problem, there were no smaller issues leading up to the issue. Because the failure happened within a block of a family member's home, I was able to get to safety. …

Went to charge my vehicle in my garage on 4/15/26. When it was fully charged, I reached to disconnect the charger from the vehicle and the connector was hot to the touch; the charging hub on the vehicle was also hot, the charger had a slight plastic burning smell. I immediately tried to contact the company and learned that they had unbeknownst to me, ceased conducting operations in the US. So I ordered a new charger. I also tried it again on 4/17/26; and the heat was higher faster than it was on 4/15/26; so I hav disconnected the device and installed a new one. The electrician noted that the breaker was damaged and had to be replaced. I also recall, that a few months after the initial install of the charger, there was an incident where my wife saw sparks in the garage from the breaker and we heard a large pop; and then the charger went out. …

Multiple times the 12V battery has died without warning. Once in driveway while engine was charged to 93%, once while parked at work parking lot at charging station. Both times the car had to be jumped by AAA and driven to the dealership where it sat for 7 days each time with NO diagnosis, no loaner, no rental, and no transport. Finally after the second time, the dealership replaced the 12V battery but still did not give any diagnosis whether this was the ICCU or not. I have complained to KIA Motor Corporation who have advanced my complaint however they have eventually dismissed my complaint. They cannot answer me whether they believe this car is safe. They cannot stand by the safety of this car. They have not acknowledged that this is a safety problem and that other motorists have had similar battery failures while driving on the highway and in other unsafe areas.

Related recalls

Electrical complaints in other EV6 years