Hyundai Ioniq 5 Complaints

1,350 consumer complaints on file.

#11720462February 25, 2026
FUEL/PROPULSION SYSTEM
ICCU failed at ~27,000 miles. Loud pop came from the under the vehicle. Afterwards, car could only accelerate to 35 mph. Dashboard error message told driver there was an electrical issue and advised us to pull over. Car had to be towed. Currently at the dealer awaiting a replacement. Dealership said it could take "weeks or months" to get a replacement part. Sudden loss of propulsion is a safety risk to other drivers. We were on the highway and could not get to speed. ICCU malfunctions appear to be very common with Hyundai EVs. Hyundai appears to be aware that this is a problem but doesn't seem very interested in solving it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720460February 25, 2026
FUEL/PROPULSION SYSTEM
ICCU failure, stranded wife and kids in the Minnesota cold. This issue is not fixed.
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
#11720400February 25, 2026
ELECTRICAL SYSTEM
The ICCU of my vehicle failed and couldn't charge using AC power which also caused my 12V battery to fail. The car has had the old recall completed month prior to this failure so Hyundai didn't replace the defective part just updated software in hope the defect wouldnt happened. Regardless the defect happened and the car while still under warranty has not been fixed in 57 days. Hyundai states my vin has no ETA for part to be delivered and fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720364February 25, 2026
ELECTRICAL SYSTEM
I was driving on a 4 lane major artery on 12 / 30/2025 traveling approximately 50 mph. Heard a loud bang and car loss power and suddenly slowed. Vehicles behind me had to swerve to miss hitting me. The vehicle could move approximately 5 mph afterward. We pulled off the road onto a side road. We later found out the ICCU failed from the Hyundai dealership. It has been there since that date awaiting parts to repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720286February 24, 2026
ELECTRICAL SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720282February 24, 2026
POWER TRAIN, ELECTRICAL SYSTEM
During level 2 AC charging the circuit breaker in the house tripped. Tried again on a level 1 charger that came with the car and again it tripped the home circuit. Again, the car overloaded the house electricla system to a point it tripped the circuit breaker. Car taken to dealership for repairs. Dealership trouble shooting identifed failed ICCU with burnt connecter pins. HyundaiCase Management number 42152269 THIS IS A FIRE HAZARD FOR THE CAR AND HOUSE.
Crash:
No
Fire:
Yes
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
#11720223February 24, 2026
ELECTRICAL SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720208February 24, 2026
ELECTRICAL SYSTEM
ICCU unit failed on 1/27/26, vehicle entered limp mode and is unusable. This is affecting thousands of Hyundai Ioniq 5 autos, and probably others as well. Due to the widespread problem, Hyundai is unable to give an estimate on finding a replacement part.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720190February 24, 2026
POWER TRAIN
There was a failure of the Integrated Charging Control Unit (ICCU) on my Hyundai Ioniq 5. We were driving home from the beach, approximately 1 mile away. When I turned the car on and started driving home, the dashboard lit up with an error and the vehicle turned on the "turtle" mode, which limited my speed. I managed to make it into my subdivision where it finally died and I was unable to get it into garage. Vehicle would not turn on, would start up momentarily, lots of errors, screen would flash, and then nothing. Very scarily, the wheels would not park and remained in neutral. This made it easy to load onto a tow truck, but scary that it could only be stopped on a flat surface. Mine and my wife's safety was at risk, as we were nearly stranded on the side of the road, I hate to imagine if this happened on a highway. The dealer confirmed our ICCU blew and we had our car back about 2 weeks later. The dealer inspected and replaced the component under warranty. This ICCU issue must be fixed by Hyundai, or at least extend the warranty. This is unacceptable.
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
#11720145February 24, 2026
ELECTRICAL SYSTEM
While driving, heard a POP sound, followed but multiple warnings to stop vehicle and check the electrical system. The car went into turtle mode. luckily I was close to home, but any other situation could have been dangerous. This is a commonly known issue with these Ioniq 5 vehicles. The ICCU fails and can no longer charge the 12v battery, causing loss of electrical systems and possibly even the ability to have hazards on if you are stuck in traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720128February 24, 2026
ELECTRICAL SYSTEM
The vehicle was in the middle of a u-turn when the ICCU fuse suddenly and without warning blew. Display warning messages came on to "check electrical system". Car was able to drive in "limp mode" at about 40 mph on level roads, but not more than 25 mph on any uphill. This is a well known problem with Hyundai EVs. It will be towed to a dealer to confirm. It felt extremely unsafe to be in the middle of a turn on a public street and have the car power system fail. Luckily there was minimal traffic at the moment. A few minutes earlier or later would have been on a heavily trafficked road
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720110February 24, 2026
UNKNOWN OR OTHER
I was on the freeway and went into limp mode and almost got into a traffic accident. My ICCU unit failed after two recalls on it.
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
#11720055February 24, 2026
UNKNOWN OR OTHER
The component that failed was the Integrated Charging Control Unit (ICCU). This component has failed twice within the past ten months. The failed components are not available for inspection, as they were replaced during prior service repairs. The failure created a significant safety risk because it resulted in a sudden loss of normal vehicle function without advance warning during operation. This placed both myself and others on the road at risk, as the vehicle could become disabled unexpectedly while being driven. The issue has been inspected and confirmed by dealer-authorized mechanics following each occurrence. There were no earlier symptoms prior to the moment of failure. Warning messages related to the vehicle’s electrical system appeared only at the time the malfunction occurred. At the time of each incident, the failure occurred without advance warning during operation. Failures of the ICCU are believed to occur due to electrical overcurrent and thermal stress damaging internal power components during high-voltage to low-voltage conversion. When these internal components fail, the system may no longer maintain the 12V electrical supply, which can lead to loss of vehicle function or sudden loss of motive power during operation. Software updates have been issued to address the issue, but failures have continued to occur.
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
#11720013February 23, 2026
ELECTRICAL SYSTEM
ICCU failure. Vehicle has 5200 miles on it. A loud "pop" was heard then the vehicle went into "limp mode" and restricted speed to 30 mph. After about 10 miles the car totally lost power and wouldn't start. Warning l messages said to get it serviced which is what I was attempting to do.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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