Hyundai Ioniq 5 Complaints

1,350 consumer complaints on file.

#11720012February 23, 2026
POWER TRAIN, ELECTRICAL SYSTEM
First time this occured we were driving in the winter and the car randomly shut down and started saying "Electrical Fault" or something of the sort. Turns out it was an ICCU issue. We got this replaced last year. Turn around 6 months later and the same thing happened again, but in an intersection. From my understanding when the ICCU fails the entire car basically goes into limp mode and prevents you from driving. Super dangerous and very hard to trust moving forward. Both of these issues have been confirmed by the dealership.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720002February 23, 2026
ELECTRICAL SYSTEM, POWER TRAIN
ICCU confirm dead by the dealer. IONIQ 5 2025 AWD. only had this car for 5 month, 4900 miles. vehicle stopped at the middle on the highway. luckey, no accident occur. no part avilable, no ETA for fix, no loaner from dealer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719975February 23, 2026
ELECTRICAL SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719972February 23, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
Routine Friday morning and just finished charging my 2024 Hyundai Ioniq 5 at Walmart. As I started my vehicle to finish my commute to work, the dreaded "Check electric vehicle system" warning light came on along with a red battery icon. There were no warning signs or anything that could have foretold what would be happening. I pulled into an empty parking stall and called the Hyundai dealer for advice. I was told not to drive the vehicle and get it towed to the dealership. After being diagnosed, my car will need a new ICCU and ICCU fuse. The dealership gave me no ETA as it often takes weeks to months to receive the parts from Korea. I was told Fontana Hyundai had 9 other cars with the same ICCU issue in line before mine. I was so glad it occurred in a parking lot and not on the freeway since a malfunction with the ICCU will basically cause the car to loose total power and control. This is definitely a huge concern and safety issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719947February 23, 2026
ELECTRICAL SYSTEM, ENGINE
ICCU failed after 14k miles. Car suddenly went into "turtle" mode (displayed on dash), car could only go 10 mph and my wife had to pull the car off the street asap and was a very scary experience. Dealer has confirmed the ICCU failure and given me a loaner vehicle. No eta on when the part can be fixed, just that it's current status is back order.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719914February 23, 2026
POWER TRAIN, ELECTRICAL SYSTEM
ICCU failure causing the vehicle to be inoperable
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719890February 23, 2026
FUEL/PROPULSION SYSTEM
ICCU failed less than 5k miles into my lease. I am now no longer able to drive the vehicle and there is no eta on getting a replacement since it’s on back order
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719870February 23, 2026
VEHICLE SPEED CONTROL, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
When in cruise control, the driver attention warning message appears regardless of where my eyes might be, whether I am wearing glasses or sunglasses or not, with nothing obstucting the sensor, with the steering wheel adjusted higher or lower. I have since May of 2025 tried to figure out how to get it to work properly to no avail. The warning continues to appear with an alarm ubntil it turns the motor off completely, even at highway speed causing an extremely dangerous situation. Additionally, I depend on the cruise control to help me maintain a safe, legal speed. This malfunction, rather than being a safety feature, is a distraction to safe driving. It CAUSES distraction, rather than provide safety. Hyundai is fully aware of this deficiency, yet has not addressed it I know that Many have experienced this smae problem. It is time for a recall to remedy this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719807February 23, 2026
ELECTRICAL SYSTEM
ICCU failure, which made the car stop dead in the road with no way to move it because the car shifts into Park when powered down (there is no way to shift into Neutral without power).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719768February 22, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
Iccu failure in middle of busy interstate. Pop sound and then notice of electric system failure. Only made it 1.5 miles before vehicle fully died. Extreme safety concern. Couldn’t use any electrical systems on EV
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719702February 22, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
The ICCU (integrated charging control unit) failed on the vehicle, which resulted in the vehicle not being able to charge the 12v battery. The vehicle was no longer able to be driven after the ICCU failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719627February 21, 2026
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
The ICCU component failed on me at 4,356 miles. Heard a pop with the car and then the dash started displaying electrical errors. To stop the vehicle and turn it off. The vehicle would not accelerate and would only go up to 25 miles per hour. Had to tow it to the dealership. Given a time frame of 30-60 days to receive the ICCU part for repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719584February 21, 2026
UNKNOWN OR OTHER
On January 17, 2026, I was driving my Hyundai Ioniq 5, when it began to decelerate and lose power while I was pressing the accelerator pedal. The deceleration progressed. A small flashing battery icon appeared on the upper display. This icon had never been on the display before. Fortunately, I was traveling downhill and able to safely pull the car over to a stop. I turned the car off. I restarted the car with the same issue recurring. I turned the car off and called the dealer and scheduled an appointment. After about 5 minutes I restarted the car and was able to safely drive home without further incident. The dealer checked the car out and determined that nothing is wrong with it. The dealer was unable to replicate the problem. I have no confidence in continuing to drive the car safely as a loss of power could cause a serious accident. I contacted Hyundai USA customer service and a case was opened. They closed the case explaining that since the dealer found nothing wrong there is nothing they could do. Thank you.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719583February 21, 2026
UNKNOWN OR OTHER, FUEL/PROPULSION SYSTEM, POWER TRAIN
I was traveling on the freeway when I got a warning saying “check electrical.”i started to pull over on the freeway and my car went into “turtle mode “and I made it off the offramp but almost got rear ended. I was half a mile from home so I limp home in a tow truck towed off. It was determined it is the ICCU.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719566February 21, 2026
UNKNOWN OR OTHER
Car had its ICCU fuse blow on 2/3/26. Been at the dealer ever since.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719525February 20, 2026
ELECTRICAL SYSTEM
ICCU failure. Dealer advises 2 month wait for replacement parts. No loaner car available. Vehicle has 15 K miles. This is a big problem with this vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719483February 20, 2026
ENGINE, ELECTRICAL SYSTEM, POWER TRAIN
The car stalled while being driven by my son. It displaced an error code. The Car had to be towed to dealership. It was diagnosed with ICCU unit failure. Needs to wait over a months for parts.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719453February 20, 2026
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719387February 20, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719374February 20, 2026
ELECTRICAL SYSTEM, POWER TRAIN, FUEL/PROPULSION SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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