What 399 owners told NHTSA about the 2022 Hyundai Ioniq 5 Bev

While driving my IONIQ 5 it flashed a power limited warning, went into turtle mode, and then experienced a total loss of power. The 12V battery was dead.

NHTSA ODI 11723501

The ICCU unit failed, making this electric vehicle unchargeable and therefore undriveable. This is the second time this has happened on this vehicle and the wait for the part was 8 plus weeks. This is a nationwide issue.

NHTSA ODI 11723635

The car would no longer charge and the dealer said it is due to a faulty ICCU. The dealer said this part is on back order with an indefinite freeze and no ETA. My car has been at the dealership shop since January 29 and Hyundai corporate has not been helpful when I escalated to them. Overall I have had these charging issues since early December. Hyundai has denied my request to buyback the vehicle since it is over 4 years old now (2022). I’m very disappointed and concerned about the ongoing ability for this vehicle to be safe and drivable.

NHTSA ODI 11721138

The ICCU failed. The car is at the dealership, availability of the failed part is unknown. The vehicle was no longer able to charge the battery. This could have happened while driving. The dealership has confirmed failure and will replace when a new part is available. Unknown if part has been inspected by others. Hyundai case has been opened. There was no warning. Indication of problem was breaker tripping at charging.

NHTSA ODI 11720966

Multiple 12v batteries died within one year of installation; ICCU finally failed at about 3.5 years of ownership. Towed to dealer on January 16, 2026, still no repair as of February 24, 2026.

NHTSA ODI 11720223

For the past few days, our 2022 Hyundai Ioniq 5 (approx. 83,000 miles) has been unable to charge using AC charging (Level 1 or Level 2). The failure is repeatable and consistent across multiple chargers: two separate home Level 2 chargers, the Hyundai-provided Level 1 charger, and a neighbor’s Level 2 charger. In each case, charging either fails to start or stops shortly after initiating. DC fast charging continues to work normally. Component/system suspected: The problem appears related to the vehicle’s onboard AC charging system (possible ICCU, onboard charger/OBC, charge port/inlet, or related high-voltage charging components). The vehicle and components are available for inspection upon request. Safety risk: This creates a safety concern because we cannot reliably charge the vehicle at home or at most public charging locations (which are predominantly Level 2 AC). This increases the risk of unexpectedly running out of charge and becoming stranded in unsafe locations, especially where DC fast chargers are not available. Reproduction/confirmation: The issue has been reproduced on multiple independent AC chargers, making it unlikely to be caused by a single EVSE/charger. A dealer appointment is scheduled for diagnosis and confirmation. Warning lamps/messages: When attempting AC charging, the vehicle reports a charging failure/unsuccessful charging condition (exact message UNKNOWN). No prior warning lamps were noticed before the issue began (UNKNOWN). This issue appears to be widespread based on numerous similar owner reports of AC charging failure on Ioniq 5 vehicles while DC fast charging still works, suggesting a potential systemic defect in the onboard charging/ICCU-related hardware.

NHTSA ODI 11720286

The contact owns a 2022 Hyundai Ioniq 5. The contact stated that while driving at an undisclosed speed, the message “Check Electrical System Immediately” was displayed. The contact stated that the failure had occurred while the contact's minor children were inside the vehicle. The vehicle was driven to the residence. The vehicle was later towed to the dealer, where it was diagnosed with a failed ICCU and fuse. The contact was informed that the ICCU and fuse needed to be replaced. The vehicle was not repaired. The contact was informed that the parts for the repair were on back order. In addition, the contact stated that the vehicle was repaired under NHTSA Campaign Number: 24V868000 (Electrical System); in February 2025. The contact stated that only the software update was performed. In addition, the contact stated that the failure was a known failure with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The contact was informed that the vehicle was no longer covered under warranty. The failure mileage was approximately 120,000.

NHTSA ODI 11719975

Q: What component or system failed or malfunctioned, and is it available for inspection upon request? A: ICCU failed - Not available for inspection (at least at this time, but willing to try and make it work). Q: How was your safety or the safety of others put at risk? A: The ICCU (Integrated Charging Control Unit) is a safety-critical component subject to federal recalls 24V-204 and 24V-868. (My vehicle had all recalls performed prior to this failure.) The failure occurred while driving which was indicated by a “popping” sound. It is contextually important to note that the ICCU is responsible for charging the 12v battery, had the 12v battery failed during the duration of my drive I would have experienced a sudden loss of motive power. A sudden loss of motive power is an unacceptable risk to public safety. Q: Has the problem been reproduced or confirmed by a dealer or independent service center? A: Yes, the problem has been reproduced and confirmed to be an ICCU failure by an official Hyundai service center. Q: Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? A: No. Q: Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? A: Symptoms first appeared February 14, 2026. The first symptom of failure was the signature “pop” sound that the ICCU failure is known for. Only after my drive and upon attempting L1/L2 charging did my dash warning indicate “Check Electric Vehicle System.” I also checked for codes with my OBDII scanner, and it showed no codes.

NHTSA ODI 11719374

My 2022 Ioniq5 left me stranded late at night in a freezing rainstorm in March of 2024 when I was 75 miles from home at it failed to charge both D/C fast charging and A/C level 2 charging, despite my trying several different chargers. The car gave me the dreaded "Check E/V System" warning when it failed to charge. It turned out to be the notorious ICCU but also the AC inverter, which had to be replaced. It took 12 days. The dealership's initial diagnosis was something draining the 12-volt battery, so I asked if they also replaced that. They said no because it had tested fine, but 9 days after I picked up the car, it did not start because it turned out the 12-volt battery was dead, and my dealership spent 2 days getting Hyundai to approve replacement of the 12-vold under warranty. Last month, 17 January 2026, my Ioniq5 again left me stranded. This time 120 miles from home in a snowstorm. It D/C charged for 10 minutes before the charging stopped and it gave me the dreaded “Check E/V System” warning. I tried two nearby Tesla Superchargers with my Hyundai issued adapter, and they both failed. I had just enough charge to make it to a dealership 110 miles from my home, where the vehicle stayed for nearly a month while they diagnosed and repaired it by replacing the AC inverter (note that had been replaced the last time) and also the AC compressor. The ICCU failures are well-known and well-documented, but the AC inverters that failed on me twice do not seem to be as common and should probably be investigated. In both cases I was stranded on Saturdays when no dealership service departments were open until the following Monday, so I had to pay for a motel overnight, which Hyundai refused to reimburse because I was not at least 150 miles from home.

NHTSA ODI 11719387

ICCU failed second time wednesday february 18, 2026. First ICCU failed November 2024 and replaced under warranty. The car went in turtle mode.....20 mph or less. Limped along safely on side of roadway and used sideroads. The dealer says the ICCU and fuse need to be replaced. The dealer wants me to pay for this part, third time is a charm? I don't think I could ever trust this part again. They want to give me the exact same part they gave me when the ICCU failed b4. There were 2 messages: stop vehicle and check power supply ......check electric vehicle system. They were timely and made this failure a bit safer. The dealer inspected the vehicle but not the manufacturer or anyone else. The car is at Balise Hyundai Fairfield CT I BELIEVE 10% OF THESE ICCUs ARE DEFECTIVE.

NHTSA ODI 11719453

The Dealer states my ICCU has failed and will be replaced. My vehicle could no longer charge on AC power (level 1 or level 2), and eventually had to be taken to the dealer because it could not be charged at home any longer due to the ICCU failing.

NHTSA ODI 11718692

I have had multiple issues believed to be related to the ICCU. The first issue was that my 12V battery deteriorated and died prematurely. I had to purchase a jump start charger and ultimately replace the OEM 12V battery in 2024 (within the first 2 years of owning my new vehicle) because it was failing to reliably start and I was at risk of being stranded every time I parked and turned off my vehicle. The 2nd issue occurred in Dec 2025 - the vehicle stopped charging with L1/L2 chargers. The dealer did not have availability to diagnose for 3+ weeks (until Jan'26), during which my only option was to use L3 Fast DC chargers (severely limiting my options for when/where I charge and costing a premium price). Once the dealer inspected my vehicle, they confirmed it was the ICCU and informed me there is a nationwide shortage and that it would be 6-8 weeks before a replacement was available. I'm currently at week 4 (mid-Feb) with no ETA currently available, so I'm forced to drive a replacement vehicle (and make alternative arrangements for personal travel that would violate replacement vehicle terms & conditions).

NHTSA ODI 11718502

While making the short drive to work on surface streets I was given a warning in an amber circle to check the electrical system. Moments later I was presented with a warning in a red circle reading "Stop vehicle and check power supply"; accompanying this warning was a drastic loss in power. Had I been on the highway I would not have been able to maintain speed with the likelihood of being stranded in an unsafe location. The dealership reported that the ICCU (internal charge control unit) had failed. This is the second such failure on this car. It has been over 4 weeks since the dealership received the car, and Hyundai has not been able to supply repair parts.

NHTSA ODI 11718521

The ICCU failed. This was verified both by my local Hyundai dealership, Conicelli, and Hyundai Corporate. My safety was put at risk because my car rapidly lost power, informing me to pull over now while I was in the middle of driving. This happened with no other warning. The component has been inspected by the manufacturer, and I had even received a recall already that was supposed to prevent this issue from happening. There were no prior warning signs other than the alert to pull over now, which accompanied a rapid loss of power.

NHTSA ODI 11718327

My car is one of many Hyundai Ioniq 5 vehicles that has experienced an ICCU (Integrated Charging Control Unit) failure. This results in a car that is not drivable, and generally needs to be pulled over within a few miles, as it no longer can be driven above about 35 mph. It also will no longer charge on AC charging (level 1/2), since the ICCU is needing to convert AC -> DC to charge the main battery. This is a very well-known problem that Hyundai is addressing in only a piecemeal fashion. Here is a very long thread about this issue: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11718033

ICCU Failure . Car stopped in the middle of the highway. I was able to move over thankfully to the side of the rode. Went into turtle mode and then it had to be Towed to my local Hyundai Dealership

NHTSA ODI 11717782

The Integrated Charging Control Unit (ICCU) has intermittent failures. During the last failure, my wife was on a busy freeway (Interstate 5 near Hwy 120 northbound) in heavy but fast moving traffic. She was driving in the #2 lane (of 4 lanes) when she experienced sudden loss of propulsion. The vehicle slowed to 5 MPH in traffic that was moving 70 to 80 MPH. She had to traverse through the #3 and #4 lanes to the narrow emergency shoulder. Cars were honking and flipping her off. In the emergency lane, the vehicle completely died after 30 to 60 seconds. She was at risk of being rear ended during the dangerous 5 MPH lane changes and in the time parked in the emergency lane. She could not start the car for 15 minutes, after which the system came back to life. She was then able to start it and continue home. The first time the ICCU failed was in a parking lot. This is a known defect with Hyundai which they have attempted to rectify with Recall Campaign 272. However, they refuse to replace the ICCU. After the first event, they replaced the battery after 22 months/32429 miles. Now they want to replace the battery again after another 20 months/34k miles. What they don't get, is that the batteries have not prematurely failed. Instead the ICCU has intermittently and temporarily drawn the batteries down causing the vehicle to lose propulsion and die. They refuse to replace the ICCU because an error code they were looking for was not in the memory. They have performed three software updates on three separate dealer visits, but the issue has not been resolved. During the last visit they kept my vehicle for six weeks while I appealed through Hyundai Consumer Affairs and the Service manager appealed through his Dealer rep. But the factory engineers held firm and would not approve the ICCU warranty replacement, and instead wanted me to pay for 12V battery replacement. We don't know if there were any warning lights since my wife was busy navigating the danger.

NHTSA ODI 11716391

The Ioniq 5 has a known issue with a part called the ICCU. When the part fails, which it seems to inevitably do despite multiple recall repair visits and software upgrades, the car ceases to be driveable. In advance of this moment when your multi ton vehicle turns into a brick you get a short warning saying pull over, but that is not always possible. The car starts loudly beeping and reduces its max speed to 12 mph, which is not great on the freeway. The ICCU is a huge safety problem, a known issue that Hyundai is well aware of, and the part needs to be redesigned and the NTSB needs to force Hyundai to extend greater warranty protections for this event. This just happened to me, the dealership says they have 8 other ioniq 5's in with the same issue and I am number 9 on an ioniq 5 iccu loaner car waiting list while the part is back ordered for at least one month. My car stopped at a stop light and fully blocked an intersection when it bricked as I came off the freeway, was super scary to sort out in the middle of the road and I was very happy that my twin toddlers were not in the back seat, i was not so happy I had to pay to have the vehicle towed and arrange a comedicly complicated way to pickup my kids due to this known issue parts failure.

NHTSA ODI 11715398

My vehicle recently experienced issues charging. It would not charge using a Level 1 or 2 charger, but would allow limited Level 3 charging. After having the vehicle inspected by a Hyundai dealership, they confirmed that the ICCU had failed for the vehicle.

NHTSA ODI 11714963

After pre warming the car in the garage, I left for work. Three minutes into the drive I heard a single popping sound from the passenger side rear of the car. I then received an error on the dash "Stop Vehicle and check power supply". I them drove 4 more miles to work with the hazards on. Two hours later I attempted to drive it to the dealer and it stopped .5 miles away. Hyundai had it towed the rest of the way.

NHTSA ODI 11714610

While driving vehicle it flashed warning to check battery and power was severely reduced, limited to about 25 mph. Battery and EV warning triangle appeared. Then within less then a minute it brought up additional warning to "Stop Vehicle and Check Power Supply" and power was further reduced to less than 10-15 mph. Car now also displayed turtle icon. After safely getting to parking spot vehicle began to shut off critical systems or displays intermittently before eventually fully shutting itself off.

NHTSA ODI 11714615

Vehicle experienced sudden loss of propulsion while driving despite indicated remaining battery charge (~13%). Vehicle became immobilized and required towing. Dealer performed static diagnostics after recharging and found no stored fault codes, but no testing was performed to evaluate sudden loss-of-propulsion under load. Manufacturer closed case without investigation. This presents an ongoing safety risk of unexpected propulsion loss in traffic.

NHTSA ODI 11714187

Car died due to 12v battery failure due to ICCU not working properly in Oct 2023. Did ICCU recall and safety updates with dealer and they installed a new 12v battery. Oct 2025, car dies again due to 12v battery failure to to ICCU. Car has been at dealer for over 2 months waiting for new ICCU part to arrive and be installed. The ICCU system on this vehicle and related vehicles in the Hyundai/Kia line up seem to have a significant design flaw. I have no confidence a new ICCU part will 'fix' the issue. This will just push the issue out again until the new 12v battery dies and we do it all over again.

NHTSA ODI 11714194

Unable to do AC charging due to faulty ICCU. A failing ICCU is dangerous to drive as the car may lose all of its power

NHTSA ODI 11714256

I first noticed something was wrong when the car only charged to 90% even though I set it to 100%, since I wanted it ready for the storm. I drove normally after that. When I tried to charge again, the breaker tripped. L1 charging also tripped the breaker. V2L didn’t work either. The weird part: the orange light was still on, and it was still charging the 12V battery multiple times. I have a battery monitor and everything looked normal. I was also able to drive the car to the dealer with no issues at all. No warning lights or errors on the dashboard. Dealer diagnosed it as an ICCU failure. Part is on backorder with no ETA

NHTSA ODI 11714282