Hyundai Ioniq 5 Complaints (2024)

222 consumer complaints on file.

#11733499April 24, 2026
ELECTRICAL SYSTEM
ICCU Failure & Main Fuse Broken
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733152April 22, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, POWER TRAIN
As I began a drive cycle, I heard a pop sound and received the “check electric vehicle system” warning associated with ICCU failure. With ICCU failure, if I had continued to drive the 12V battery would have run to zero and the car would have died completely. Vehicle goes to dealer tomorrow for confirmation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11731284April 15, 2026
ELECTRICAL SYSTEM
Known ICCU issue: the 12v battery died for no reason rendering the car undrivable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11731279April 15, 2026
ELECTRICAL SYSTEM
The issue involved a failure of the 12V battery system in my Hyundai Ioniq 5, which powers essential electronics and allows the vehicle to operate. The battery suddenly lost charge while I was driving, causing the vehicle to become inoperable. The car was towed to a dealership, and the battery and related systems are available for inspection. My safety and the safety of others were put at risk because the failure occurred on the road, forcing me to pull over unexpectedly. This created a hazardous situation, especially in traffic, as it increased the risk of a collision or leaving me stranded in an unsafe area. The vehicle has been taken to a dealership for diagnosis, they had stated there is a recall on this vehicle, iccu unit failed and needs to be replaced. It has been inspected by the dealership service department, but not by police or insurance representatives. Prior to the failure, there were clear warning lights or messages indicating an issue. The problem appeared suddenly while driving, within 5 minutes the car shut down.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730806April 13, 2026
ELECTRICAL SYSTEM
On [XXX], my 2024 Hyundai Ioniq 5 experienced a sudden and complete failure of the Integrated Charging Control Unit (ICCU). The failure rendered the vehicle inoperable without warning, requiring it to be towed to a dealership. The vehicle is currently located at AutoNation Hyundai in North Richland Hills, TX and should be available for inspection upon request. This failure created a significant safety risk. The vehicle lost functionality unexpectedly, which could have resulted in a dangerous situation if it had occurred at highway speeds, in traffic, or in an unsafe location. A sudden loss of power or inability to restart the vehicle presents a clear hazard to both the driver and others on the road. Prior to the failure, there were no clear warnings indicating an imminent critical issue. A 12V battery issue was suspected at the time of failure, and roadside assistance replaced the battery, but this did not resolve the problem. The root cause was later identified as an ICCU failure. The problem has been confirmed by an authorized Hyundai dealership (AutoNation Hyundai, North Richland Hills, TX) on April 10, 2026. The dealership determined that the ICCU requires replacement, with an estimated minimum repair timeline of four weeks due to part availability. The vehicle has been inspected by Hyundai roadside assistance and an authorized Hyundai dealer. No inspection has been conducted yet by the manufacturer directly, law enforcement, or insurance representatives. This issue appears to be consistent with widely reported ICCU failures in Hyundai Ioniq 5 vehicles, suggesting a potential systemic defect that may warrant further investigation and possible recall action. 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
#11730552April 11, 2026
ELECTRICAL SYSTEM, ENGINE
For the second time, the integrated control unit, ICCU, has failed to this is AFTER being replaced under the recall. The recall solution has not fixed the problem, and is a fake bandaid on a problem that means cars will totally stop working in the middle of the road. This is totally unsafe and unacceptable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730250April 9, 2026
UNKNOWN OR OTHER
On 3/19/2026. Battery was at 20% SOC. Plugged in my home L2 charger. Car did not start. Took vehicle to dealer the next morning 3/20/2026. It was diagnosed as an ICCU failure. Parts ordered car left at dealer but still waiting on 4/9/2026 for issue to be resolved.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729789April 7, 2026
FUEL/PROPULSION SYSTEM, ELECTRICAL SYSTEM
2/28/26 Driving home, heard a loud pop, notice is on the dash say check vehicle electrical system. Vehicle begins to slow down and eventually die. Called the manufacturer and had it towed to the dealership. The ICCU had failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729747April 7, 2026
ELECTRICAL SYSTEM
My on Thursday, April 2, my 2024 Hyunda Ioniq 5 displayed the "Check Electrical System" message displayed. I had just started the car. I started to lose propulsion on a busy street [XXX] ). I managed to get the car to [XXX] and had to pull over. I had the car towed to the Luther Hyundai, [XXX] . On Monday, April 6, the dealer informed me the ICCU failed. The ICCU and a fuse were replaced. I picked up the car April 7. Although Hyundai has supposedly fixed the ICCU problem, it continues to fail, as mine did. 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
#11728898April 2, 2026
ELECTRICAL SYSTEM
There were no dash warnings. The car slowed to 20MPH and then stopped just as we were about to pull onto a busy freeway. The dash stayed on and then went blank while I waited for the tow truck to take it back to the dealer. The tow truck driver was unable to move the car without jumping the dead battery to get the car to pull up the tow truck ramp. We were told it was an ICCU failure. The car was in the Hyundai dealer for replacement of the ICCU unit for approximately 10 days.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11728139March 30, 2026
FUEL/PROPULSION SYSTEM, ELECTRICAL SYSTEM
Car won’t start and is completely dead. Doors won’t open, including charge port door. Once you manually unlock car is totally dead inside. Took to dealer for an ICCU replacement under warranty but died again 1 week later. Another ICCU failure? Terrible.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11727611March 27, 2026
ELECTRICAL SYSTEM
Based on all symptoms - loud pop followed by limp mode and electrical warning, and inability to charge -- iccu is busted.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11727550March 27, 2026
POWER TRAIN, ELECTRICAL SYSTEM
ICCU failure. Common problem but Hyundai seems to have no fix despite it happening for years now.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11727506March 27, 2026
ELECTRICAL SYSTEM
ICCU and its fuse blew randomly while reversing out of a parking spot. A warning light appeared on the dashboard saying "check electric vehicle system" after a loud pop noise came from the rear passenger side. The ICCU charges the 12V battery on board, and when the 12V dies the whole car dies, resulting in the car shutting down suddenly. It's a known issue with this model car. The service center confirmed the ICCU blew when they ran diagnostics.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11727361March 26, 2026
ELECTRICAL SYSTEM
I was driving at 25 mph when I heard a loud pop come from the rear of the car and subsequent warning message came up on the dashboard - "STOP VEHICLE AND CHECK POWER SUPPLY". In an electric vehicle this is a very alarming message to see. I was fortunate to be close to home so I was able to drive home and call roadside assistance for my car to be towed to the dealer. The vehicle has since been diagnosed with an "ICCU" failure. I had no indication or warning that this was going to happen, just a sudden failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11726091March 21, 2026
ELECTRICAL SYSTEM
I was driving in a parking lot and heard a “pop” sound like a balloon breaking. The Ionic 5 lurched and stopped. A red circle appeared on the dash and said “check electrical system.” I slowly maneuvered the car into a parking spot because there was very little power and turned off the car. I called the Hyundai dealer and they told me to have the car towed to the dealer in Palm Springs, CA. When the tow truck unloaded the Ionic 5 at the dealer, I attempted to move the car into a parking spot so it was out of the traffic lane. I started the car again it again lurched and a yellow circle came up with a turtle icon. Then another red circle appeared “check 12V battery”. The car would not move after that. I went into the Hyundai service department and talked to the service representative. He said he would take the vehicle in for service and I signed the paperwork.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725950March 20, 2026
ELECTRICAL SYSTEM
ICCU failure while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725845March 20, 2026
ELECTRICAL SYSTEM, POWER TRAIN
Received multiple "Check Vehicle Electric Systems" on a drive which went away and then got into the car, turned it on, shifted into drive, and heard a pop from bellow before moving at all and the car went into Turtle Mode and blasted warnings. The car completely died with zero power leaving it stranded in sub freezing temperatures and unable to lock the car or open the lift gate to access the trunk area. Eventually it was towed to the dealership and was diagnosed to have a faulty ICCU which took 5 weeks to replace.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725754March 20, 2026
ELECTRICAL SYSTEM
Pop sound while driving. Lost ability to drive at normal speed. Was able to take car to repair shop and was informed of ICCU failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725713March 19, 2026
ELECTRICAL SYSTEM
ICCU failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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