2023 HYUNDAI IONIQ 5 Complaints

Car won't charge on Level 1 charging; it popped the GFCI in my garage and now no longer charges on level 1 (regular slow AC charging).

The car stopped trickle charging even though it wasn't at 100%. When I turned it on, there was a warning message indicating an electrical failure. I called the dealership and they said it was unsafe to drive it the 2-3 miles to the dealership so it had to be towed. Once it was diagnosed, the dealership told me the ICCU had failed. This is a known defect in this car that for some reason has not been resolved with the previous recalls, and the replacement units that are installed are just as prone to failure as the original. It is expected that I will have the car back approximately one week after it was towed to the dealership.

The ICCU, which is an electrical component that charges the 12 volt battery, failed. As a result the power drained completely and the car shut down. This is a safety issue because it happened while driving and my husband just barely had time to get the car over to the side of the road. It has also been know to happen to cars of this model while driving on a highway, which is obviously very dangerous. The problem has been confirmed by a dealer - Gary Rome Hyundai in Holyoke MA. They ordered us a new ICCU, which took about a month to get. Orders for the ICCU's are backed up because this problem has been happening to so many cars. And as the dealer reported, the problem has been known to happen to the same car multiple times, even after the ICCU is replaced. The vehicle was not inspected by the manufacturer, police, or insurance. It was towed to the dealership for repair. There were no warning messages until the battery started failing and it was only about a minute before the car shut down.

Had all previous open recalls for iccu performed. No previous warning in car. Driving unto free way. Loud noise like a tire pop. 12 volt low power warning on dash screen. Car began to lose power. Picture of a turtle shows up. Low power warning. Car lost power within 10 seconds. And couldn't accelerate. Extremely dangerous. Once completely stopped the car turned off and couldn't start again. Was able to get car to turn on with jumper cables by tow truck. But couldn't get to "start" engine. Dealership says the 12 volt battery and iccu needs to be replaced. They are blaming the issue on the fact that I had an aftermarket subwoofer installed and don't want to cover under warranty. Car ran fine with said subwoofer for a year prior with no additional changes. Have used same subwoofer and amp on multiple cars with no issue.

The car would not start when start button was pressed. Warning on the dash said 12v battery critically low. This happened on three different occasions. After jump starting the car, everything works as normal. I am able to turn off and turn on again as expected. 12v battery was tested and seems to be fine. Even the OBD2 readings show battery as working correctly. There seems to be a software glitch that makes the car think that the 12v battery is low. The high voltage battery was charged to above 70 at least on all three occasions. Now I carry a external jumper battery to avoid this situation

The Integrated Charge Control Unit failed despite having all related recall repairs/actions implemented. Failure occurred while pulling into a parking place after completing level 2 charging to 80%. The failure has not yet been confirmed by the dealer, but all common symptoms match this failure including hearing a pop sound from the rear of the vehicle followed by “Check Electrical System” indication and limited distance low power, low speed mode. Had this happened while driving at highway speed, the sudden loss in power and speed could have been dangerous to respond to and get off the highway safely. The vehicle is scheduled to be inspected by the dealer shortly.

Component or System Involved: High-voltage battery system — fault code P1AA700. The vehicle is currently located at an authorized Hyundai dealership and available for inspection upon request. Safety Risk: The vehicle became undriveable due to a potential high-voltage battery failure, posing a significant risk of electrical hazard or loss of propulsion. I was advised by the dealership not to drive or retrieve the vehicle due to safety concerns. As the sole user of the vehicle in a household with children and daily transportation needs, this created a severe disruption and risk to personal and family safety, especially if the issue had occurred while driving. Confirmation of the Problem: The issue has been confirmed by the dealership, who retrieved the fault code. However, they are unable to complete diagnosis without Hyundai Corporate’s “Techline” technician, whose response is still pending as of this report. The vehicle has been at the dealership since June 30, 2025. Inspection: The dealership has begun inspection but cannot complete diagnosis or repair until Hyundai Corporate provides guidance. The vehicle has not been inspected by police or insurance, but it is under review by Hyundai’s technical assistance team. Warning Messages or Symptoms: Yes — prior to the failure, the vehicle displayed dashboard warning messages related to the high-voltage battery system, and the drivetrain became unresponsive. These warnings appeared just before the vehicle became unsafe to operate.

When i was out driving with my little daughter, in the middle of the road, the car showed a warning of “check electric system”. The car was very slow and went into limp mode. I had to quickly park at a shoulder. Called roadside assistance, they sent a tow truck within 40 mns, the car was completley dead when they arrived. They had to send another tow truck that arrived after another 35 mns. I had to wait in the heat with my little daughter till they transferred us to the dealer , the repair for the iccu failure took 2 weeks. Now i am very scared each time i drive the car that this might happen again.

ICCU failure leading to being stranded 120 miles from home as I returned from a vacation with my family. The vehicle was working fine for half of the trip, then after we stopped for lunch, the car went into a "limp mode" max of 25 mph as I was entering the highway. I got a warning telling me to inspect my electrical system and pull over immediately. There were no warning signs. The vehicle was towed to the nearest dealer (still 110 miles from home). The dealer confirmed what happened - an iccu failure where the 12v battery was not charging - and I had the iccu replaced. This is a problem impacting many Hyundai Ioniq cars. The dealer and manufacturer was not able to tell me why it happened or what I could do to try to prevent it happening again. I have no confidence in this car

The Integrated Charging Control Unit of the fully electric Hyundai Ioniq5 stopped working while I was driving my son home from the Zoo. I got a warning that there was an electrical system issue and I needed to immediately stop the car. The car lost power quickly, and I was luckily able to pull over into a parking lot and await a tow truck. This is a chronic saftey issue with Ioniq 5s and needs to be addressed.