2023 HYUNDAI IONIQ 5 Complaints

My car failed to charge on my level 2 home charger and would only charge on a level 3 fast charger. Because of this, I was unable to charge my car at home. I was on a trip about 1 hour from my home in an area of Massachusetts that developed an electrical blackout. I almost ran out of power on a dark road with no streetlights. I was lucky to find a level 3 charger just on the outside of the blackout area when my car had less than 5% power. I brought the car to the Hyundai service center 2 weeks ago. I called daily for updates and was told they were "diagnosing" the problem. I called again, yesterday and was told it needed an ICCU. It had been ordered that afternoon (2/5/26) and they hoped it would arrived within the week. They were unable to provide a loaner car (even though I've been without a car for two weeks).

The ICCU failed, leaving me stranded 4.5 hours from home. Luckily I was able to tow the car to the nearest dealership and they gave me a loaner. It has been 6 weeks and no update yet.

I am reporting a safety-related defect involving unintended vehicle movement on my Hyundai Ioniq 5 (Model Year 2023, SEL AWD). Observed behavior: With the vehicle in Drive and the Auto Hold function active (indicated by the white “AUTO HOLD” indicator in the instrument cluster), I brought the vehicle to a complete stop by pressing the brake pedal. Auto Hold engaged (text now green), the vehicle remained stationary, and I removed my foot from the brake. After approximately three minutes of remaining stopped, a driver-assistance system error message appeared on the instrument cluster. At that point, Auto Hold disengaged (the “AUTO HOLD” indicator disappeared), and the vehicle began to creep forward on its own. I did not command acceleration, did not press the accelerator pedal, and did not intentionally release the brake. The movement was unexpected and created a safety risk. The first occurrence happened in a school drop-off line with the vehicle stopped near other vehicles and pedestrians. I have since reproduced the behavior and captured it on video. Related observations: Similar driver-assistance system errors have occurred while the vehicle was in Park and in Drive, with or without Auto Hold active. In those cases, the vehicle did not move because it was either mechanically locked or I had my foot on the brake. In all cases, Auto Hold deactivated. Safety concern: This behavior raises concerns about the reliability of Auto Hold and its interaction with braking and driver-assistance systems, particularly after the vehicle has been stationary for an extended period. Unintended forward movement presents a significant safety hazard. I am reporting this issue for investigation of potential defects in software, sensors, or control logic. Video evidence is available.

While driving, the vehicle displayed a “Check Electrical System” warning and experienced loss of propulsion power. The vehicle became inoperable and required towing. The Hyundai dealer diagnosed failure of the Integrated Charging Control Unit (ICCU), a known failure point on this platform. The ICCU is currently on backorder with no confirmed repair date. This failure creates a serious safety risk, particularly if it occurs at speed or in traffic. I no longer feel the vehicle is safe or reliable to operate.

Car became unresponsive leaving me stranded with an electrical system error warning which the dealership has confirmed to be the ICCU issue that has been affecting many cars since 2022

High-voltage battery system failure causing complete loss of propulsion. Vehicle entered "turtle mode" (reduced power warning) at 25% charge, then became completely immobile — unable to move even on flat surface. This has occurred multiple times. Charging system displays "fully charged" within one minute while vehicle dashboard shows 60% — clear battery management system malfunction. Vehicle has been undriveable and awaiting battery replacement for over a month at this point with no information on when the battery will arrive or be in stock. This is a known widespread defect in Ioniq 5 vehicles. Multiple owner reports document the same battery system failures, extensive reports of ICCU failures, and Hyundai's solution is to replace these failing components with the same component that fails repeatedly in other vehicles. No permanent fix or design change has been issued. This is a critical safety defect. Vehicle becomes completely immobile without warning — total loss of propulsion in traffic creates immediate crash and stranding risk. False charge readings mean the vehicle cannot be trusted to complete any trip safely. I have been left stranded multiple times on the turnpike of 80mph speed limit due to sudden total system failure. Hyundai has not resolved the root cause. They continue replacing batteries with the same defective system. This vehicle is fundamentally unsafe and unreliable. I should not be required to drive a vehicle with a battery system documented to fail catastrophically and repeatedly. Service records and repair invoices available upon request — vehicle currently at dealer awaiting battery replacement.

On 1/3/2026 I attempted to charge my car using my at-home level 2 charger. When charging initiated, the breaker tripped. I reset the breaker and tried again, but the same issue repeated. I attempted to charge my car by plugging directly into a GFCI outlet using the level 1 charger that came with the car, but this tripped the GFCI breaker. I had enough battery to drive to the dealer, and Hyundai diagnosed the issue as an ICCU failure. In my particular case, I wasn't put in danger, since the failure did not occur while driving. But this model and other models based on this platform have experienced a pattern of failures with this component. In some cases, the ICCU fails while driving in such a way that the car goes into a limp mode before becoming inoperable. I'm grateful this did not happen to me. I felt it was important to report this issue if only as a record of one more ICCU failure associated with this model.

I purchased the 2023 Hyundai Ioniq 5 Limited edition car on 12/20/2025. On 01/03/2026, a warning light came on and said I needed to check my electrical system. I drove 3 miles home and made an appointment with the Hyundai dealership on 01/05/26. On the morning of 01/05/26, as I was attempting to drive the car to the dealership, a turtle symbol appeared on the dashboard and said power limited. Three blocks later, the warning sign popped up that said pull over immediately. I pulled over as far as I could but the car completely died right in front a no parking sign. I had to wait for three hours in the freezing cold to get the car towed to the dealer. After two days, the dealer confirmed that the ICCU unit had failed and it would be replaced under warranty. One month later, I still do not have my car back, as the part is on backorder. Luckily, we had not taken this car to the mountains 1 week prior, or we would have been stranded in the freezing cold with minimal cell phone reception.

ICCU failed 12/29/25, car inoperable and towed to dealer. Luckily this was in my garage , had it been on the freeway it would have been very dangerous and car goes into limp mode. Car red battery light and made chimes. Only has 25,000 miles on it. Has been at dealer since then with no resolution update.

My 2023 Hyundai Ioniq 5 lost all power and stopped in the middle of a busy road. I had no power even when I pressed the gas. Nothing in the car worked, including the hazard lights, which made it even more dangerous as cars were speeding past me. I was finally able to call the police to come help and they set up a safe area. However, I was put in an unsafe situation while I waited for assistance from the police. In addition, there was no way to put the car in neutral once the power was off (at least I couldn't find a button or a switch to do that), which made it difficult to get it towed. I understand the car died on me because of faulty ICCU on my car. Btw, the car had just finished its software update earlier that day. I am not sure if this somehow contributed to the ICCU failure.