2024 HYUNDAI IONIQ 5 Complaints

While driving car, got warning to “Check electric vehicle system” quickly followed by “Stop vehicle and check power supply”. Car went into “Power Limited” turtle mode and speed dropped down to 25mph without warning. Was able to limp the mile and a half home but glad I was not driving on the interstate at high speed at the time. Dealer confirms ICCU failed and needs replaced, part backordered and no ETA on when it will be back in stock.

I heard a popping sound from behind driver seat when I started the car. A few minutes later a dash warning showed up "stop vehicle and check battery state" followed by a complete loss of power on the road within 3 miles of reduced power driving (I was trying to find a safe spot to turn out of 6 lane road). Vehicle had to be towed to dealer who states the Integrated Charge Control Unit ICCU is not working and needs to be replaced. (i suspect the popping sound was related to that - ?blown fuse). The Part is on back order and has to be ordered from Korea and during the weeks long wait they do not have a loaner care to provide. This ICCU issue had a recall with software fix in 2025 which was performed on my vehicle. Why is Hyundai not fixing this problem for good. And why are they not providing me a loaner car?

Jan 2, 2026. Vehicle made a popping sound and threw an error message. Took it to the dealer. Dealer diagnosed it with failed ICCU (integrated charge control unit?). Said that they had recently gotten 8 more failed units. Said that there are no more parts in stock in the US and Hyundai must manufacture and ship more. ETA is March but they are not sure. I do not believe Hyundai’s assertion that this only affect 2% of their EVs if they cannot keep parts in stock.

We purchased the car less than a year ago. It is still under warranty. The ICCU failed while we were driving on a city street. Several warnings lit up on the screen, telling us to immediately pull over for safety because of an electrical failure. We waited 30m for a tow truck in below freezing weather. It was towed to the Hyundai dealership, and several days later they inspected it and confirmed it was a failure of the ICCU (a known problem with this make and model). Replacement parts are on indefinite backorder - so we have no idea when the car will be repaired and returned to us.

On December 28, 2025, the vehicle displayed the dashboard warning "Check electric vehicle system." It was brought to the dealership and has been sitting there for 24 days so far due to a drained 12v battery and failed ICCU system. The dealers informs me that the ICCU is on a "national freeze, meaning that the part is on standby for further review by Hyundai engineers. The safety of everyone in the vehicle was at risk because the electrical system could have powered down in traffic without warning.

I was driving the car on the morning of January 1, 2026 and on its own with no warning it slowed down to 22 miles per hour on a street with 40 miles per hour. Cars angrily began speeding around me, and I could not make the car speed up beyond 22 miles per hour. I turned down another street and a message in the car said something to the effect of to check power source and pull over. I turned the car off and restarted but it the problem continued. I was able to make it home, and the car then went completely dead. I had it towed thereafter to the Hyundai dealer and they eventually told me the ICCU was broken and would need a new one (but they cannot say when even after weeks). I now see that many others have had this same problem for some time. I was not warned that this could happen (and would not have leased the car had I been told). It is dangerous to have the car throttle down especially to not be warned ahead, and I am glad I was not on a freeway and made it safely home. The dealer said this is happening to others, and that there are no replacement ICCUs in the United States. From the internet (I cannot verify) others said they waited months and got the same part which has failed for many, sometimes again after replacement. I only know what happened to my car and consider this dangerous.

The ICCU failed at 11,000 miles and 11 months into the lease. When the ICCU fails, the car becomes inoperable. This was a major safety hazard since it broke down on a major US highway and I was barely able to get off to the side of the road. This seems to be affecting a large number of Ioniq 5 and Ioniq 6 models.

Our 2024 Hyundai Ioniq 5 suddenly lost propulsion after briefly showing a warning that the 12V battery was malfunctioning. Fortunately, this happened close to our home on a road with little traffic. We could make it home at very slow speed (15mph) and the car completely shut off on our driveway and became unresponsive. The vehicle was towed to our Hyundai dealer by Hyundai roadside assistance service. The mechanic at the Hyundai dealer (Sport Durst Hyundai, Durham, NC) informed us that the Integrated Charging Control Unit (ICCU) had failed and did not charge the 12V battery. After researching I learned there had been a recall on the ICCU for model years 2021-24. However, when entering our car's VIN into the Hyundai recall site, and also in the NHTSA recall site, we found that our car was not included in the recall. Still, the ICCU failed. If we had driven on a freeway the sudden loss of propulsion could have caused a catastrophic collision. I also read that even after ICCU replacement due to recall, some replaced ICCUs failed again. I am very concerned about the safety of the car, even after repair. The mechanic advised us that it may take more than a week for the ICCU to arrive for replacement.

We heard a pop noise and then received low 12 volt low battery warning. The Integrated Charging Control Unit (ICCU) might be the root cause of the Hyundai Ioniq 5 electric vehicle. Car went into slow turtle mode and we could barely move the car. we pulled over and found a safe spot to park car. we had car towed to Hyundai dealership since car was not operational.

ICCU unit died while driving. Very sudden - I got a message on dashboard to check the electrical system (and how am I supposed to do that on my own while driving?). Within a few minutes system tells me power was reduced (I had 85% charge), within a minute or so after that system starts telling me to pull over. Happened in town so I got to a paring lot and called service -- but the speed and cryptic nature kind of set me aback.