Hyundai Ioniq 5 Complaints (2024)

222 consumer complaints on file.

#11720487February 25, 2026
ELECTRICAL SYSTEM
ICCU failure. Put vehicle in gear and heard a pop from the back. Dash said something about check vehicle soon. approximately 5 minutes later chimes went off and dash said another electrical warning that sounded more serious. Towed to dealership. Said ICCU was bad
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720479February 25, 2026
ELECTRICAL SYSTEM
ICCU failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720475February 25, 2026
ELECTRICAL SYSTEM
The ICCU and fuse failed, rendering the vehicle unusable and stranding my wife and child. The problem has been confirmed by the dealer. The component was inspected and confirmed to have failed. There were no warnings or indications of any kind prior to failure. My wife heard a pop from the back of the vehicle, then all sorts of warning lights lit up and the vehicle stopped.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720432February 25, 2026
ELECTRICAL SYSTEM
a warning "Stop immediately! Check Power Source" with loud beeping occurred and we were able to pull over and park safely. However, we were a 30 minute drive from home and in a downtown urban area. Took the next day off of work (essential healthcare worker at a hospital) to have car towed to dealership. ICCU failure. Told it could take months for replacement part to be shipped. Given a loaner car. Concerned that Hyundai does not have a real solution for this problem and that I cannot ever drive the car far from home again without risking the same thing happening again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720419February 25, 2026
ELECTRICAL SYSTEM
12v battery died at 13,484 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720233February 24, 2026
ELECTRICAL SYSTEM
On November 21, 2025, while driving at approximately 60 mph and with approximately 15,685 miles on the vehicle, my 2024 Hyundai Ioniq 5 suddenly experienced a loss of automated systems including adaptive cruise control, lane keeping assist, and forward sensors. The failure occurred without warning. The following day, the 12V battery was completely dead and the vehicle required a jump start to operate. The vehicle was diagnosed with a failed ICCU (Integrated Charging Control Unit). The ICCU was replaced by the dealership on January 6, 2026, under warranty. There were no crashes or injuries as a result of this incident. The sudden loss of driver assistance systems at highway speed poses a significant safety risk, as drivers may be relying on these features and have no warning before they cut out.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720167February 24, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I was driving on a residential street, traveling about 25 miles per hour. I heard a loud popping sound from the back of the car and within seconds I started to lose power. I pulled over to the side of the road and my car was dead. No electrical system, I couldn't even power the locks. I waited for several hours to have it towed to the dealer where it sat for 29 days waiting for the part. It's the ICCU that failed. Had I been going at highway speeds, I very likely could have been in a life threatening accident. This is unacceptable for a car.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720078February 24, 2026
UNKNOWN OR OTHER
Car would not turn on in the morning. Replaced 12v battery. After battery replacement, received "CHECK ELECTRICAL SYSTEM" warning message. Car was able to be driven, but could not be driven faster than 25mph. Taken to dealer where it was confirmed the car's ICCU malfunctioned and would need to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720051February 23, 2026
ELECTRICAL SYSTEM
ICCU failure. Occurred within the first few hundred feet after starting a drive.
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
#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
#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
#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
#11719322February 20, 2026
POWER TRAIN, FUEL/PROPULSION SYSTEM
Vehicle displayed "Power limited" and slowed to a crawl, was able to drive less than a quarter mile to a safe place before it displayed "Stop vehicle and check power supply" then completely shut down. Diagnosed as ICCU failure by the Hyundai Dealer service technician, with the parts on backorder and no ETA for the 15 or so other Hyundai Ioniq 5's with the same failed ICCU waiting at the same dealership, in front of me.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718881February 18, 2026
ELECTRICAL SYSTEM
Sudden ICCU failure in 2024 Ioniq 5 electric vehicle . A warning message to check electrical system appeared suddenly on driver dash screen. Tried to drive vehicle off street to a safe place to park. Vehicle shuttered and shook and would only move under 5mph on busy shopping & hospital area of 45 MPH road, placing me and my [XXX] child in danger of being hit by another fast moving car. Vehicle was towed to Bob King Hyundai in Winston Salem. They diagnosed the problem as a failed ICCU. Ongoing and long term problem with Hyundai. Service department has had my car for 11 days so far. They update me frequently. The part has been ordered but there is not ETA. Also, there is no guarantee that the new part will not fail as well. This puts my family at risk every time we drive the car, especially on busy roads and interstates. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718794February 18, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
My car gave me a "Check electrical vehicle system" message, which I have seen online may mean a problem with the ICCU. As the dealership is close - about five miles from my home, on residential roads - I decided to drive there. The car lost power very quickly and then died in the road shortly after leaving my driveway. Thankfully I wasn't on a busy street or an intersection and was able to safely get it to the side of the road, but if it had died while driving at a higher speed it would have been very dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718658February 17, 2026
ELECTRICAL SYSTEM
ICCU failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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