Hyundai Ioniq 5 Complaints (2023)

385 consumer complaints on file.

#11665583June 8, 2025
ELECTRICAL SYSTEM
The ICCU failed while I was driving on the interstate, resulting in a loss of power. The car had to be towed. I waited 2 hours on the side of the freeway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664301June 2, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, POWER TRAIN
Vehicle warning alarm came on with message to immediately pull over and check power supply. Towed car to dealer where ICCU and fuse were replaced. This after 1-2 recalls were completed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662933May 24, 2025
ELECTRICAL SYSTEM, POWER TRAIN
My car’s ICCU (Integrated Charging Control Unit) failed, causing the 12-volt battery to stop charging and die, leading to a loss of power to the vehicle, resulting in the vehicle being completely immobile. I was driving on a busy road when all of a sudden the car started to slow down dangerously which almost caused the cars behind me to crash into me. The car's screen said it was entering limp mode. Then the vehicle completely stopped. I was stranded far away from home. I had to call a tow truck to tow the car to the dealer. The problem was confirmed by the dealer. The dealer confirmed the ICCU and 12-v battery failed. The dealer took 3months to repair the car.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662757May 23, 2025
ELECTRICAL SYSTEM
The ICCU died, causing the car to stop working while I was in traffic. This represented danger to me and my passenger, as well as other vehicles on the road. The car is currently with the dealer awaiting a new part.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661905May 19, 2025
ELECTRICAL SYSTEM
The ICCU in my 2023 Hyundai Ioniq 5 failed unexpectedly, despite the vehicle having completed all applicable recall campaigns intended to address this issue. The failure resulted in a sudden loss of power, with multiple warning messages appearing on the dash (e.g., “Check Electric Vehicle System”) and the inability to drive or charge the vehicle. This posed a serious safety concern as the vehicle became disabled without warning. This issue is known among Ioniq 5 owners and appears to persist even after recall software updates or prior service actions. It raises concerns about the effectiveness of Hyundai’s recall remedies and the reliability of the ICCU hardware itself. The problem poses a potential safety risk due to the loss of propulsion, especially if it were to occur at highway speeds or in high-traffic environments. Requested Action: I urge NHTSA to investigate the continued failure of ICCU units post-recall and whether current recall remedies are adequate to ensure long-term safety and reliability.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661862May 19, 2025
POWER TRAIN, ENGINE, ELECTRICAL SYSTEM
The car lost its ability to accelerate during rush hour on a very busy interstate while I was in the far left lane. It started by jerking really hard off and on, like a very hard brake for a second, and then normal for a few seconds, and then hard braking again. I could accelerate after the "braking". There were no warnings or errors. This continued for about a minute while I was trying to decide if it was triggered by accelerating or braking, and I couldn't figure it out. At that point, I couldn't accelerate and received a number of lights and a message to check the EV system or the electrical system. I don't remember because at that point I was trying to immediately figure out how to pull over and not get hit. Luckily, it was slow enough and traffic had just thinned out enough, having passed a popular exit, so that I could coast to the shoulder across all of the traffic. I noticed at this point that the car was in neutral. I couldn't shift into drive, however. I tried to see if turning it off and back on might help. It did at that point. There were no error messages, and I could shift into drive and drive normally after turning it off and back on. Again, I wasn't concerned with documenting an error message that I assumed would be stored. The car is available for inspection. The safety of myself and my kids and other drivers around me was at risk as we could not accelerate and I was in the far left lane to the right of an express lane and left of a lot of traffic to have to cross to get out of traffic. No, the problem has not been reproduced, and it was taken in the next morning to the dealer who found nothing wrong and no stored error codes. No lamps or messages appeared before the loss of acceleration and promptly disappeared after restarting the car. Nothing was stored for the dealer to retrieve, either. The dealer ran diagnostics and found nothing wrong.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661743May 18, 2025
ELECTRICAL SYSTEM
I am filing this complaint regarding a serious safety defect in my 2023 Hyundai Ioniq 5 that occurred on 5/14/2025. The vehicle experienced a complete failure of the 12-volt auxiliary battery while parked in my driveway. As a result, the vehicle became fully unresponsive (“bricked”), and I was unable to open the passenger side front door, either of the rear passenger doors, or the back lift door. Only the front driver door could be opened manually and it had been unlocked at the time of the battery failure. I suspect that if I had locked the door prior to the battery failure I would have been locked in the car and I would have had to call for emergency help. This failure posed a significant safety risk, as passengers or I could have been trapped in the vehicle if this had occurred while on the road, in an emergency, or in a remote location. Larger or mobility-impaired passengers would likely be unable to exit safely through the narrow front passenger side if I had been able to open it. Even if I had broken the windows, it is unlikely that larger people could have escaped. There are no mechanical release mechanisms for the doors, and no clear emergency override was functional during this failure. This issue is further exacerbated by the fact that: •The Ioniq 5 relies entirely on the 12V system for door actuation and vehicle wake-up, even when the high-voltage battery is full. •There is no redundancy or mechanical failsafe for opening all doors in a total electrical failure. I have since lift wheel towed the vehicle to the Hyundai of Escondido where the 12V battery was diagnosed as faulty and replaced. The service representative acknowledged other similar occurrences and acknowledged there has been no permanent resolution or acknowledgment of the inherent design risk in such scenarios. This is not an isolated case — numerous owners have reported similar issues across online EV forums and to NHTSA. The lack of emergency door egress is a unexcusable defect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660965May 14, 2025
ELECTRICAL SYSTEM
The ICCU unit failed for the second time. The part is on back order and has not yet shipped, my car has been at the dealership for a month waiting for the part. ICCU failure has been a known issue for some time and the lack of parts to replace is astonishing.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660750May 13, 2025
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
Code P1A9096 Iccu and fuse. The car is currently at a dealer in Barre, VT. While driving numerous warning lights appeared lowering my speed to 10 MPH immediately leaving me vulnerable to a collision in moving traffic. Warning lights include "Check Vehicle Electric System", "Power Limited". Issue confirmed at dealer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660536May 12, 2025
POWER TRAIN, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
2023 Hyundai Ioniq 5 ICCU failed with DTC P1A9096 which renders the vehicle in limp mode once the 12V battery drains. This is a major issue which keeps happening even after severals recalls with software updates related to this problem. When this incident happened i had gotten all the recalls and software updates available for the entire care and still it failed prematurely at 35K miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11659859May 8, 2025
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
Was driving on highway and started receiving error messages for "check electrical system". Car speed dropped to max of 45mph while actively on a highway. Was able to pull off an exit but car needed a 55 mile tow to the closest dealer. Dealer has identified that the ICCU needs to be replaced but has no timeline as the item is on back order. Car is model year 2023, purchased in February of 2023 and has 22,000 miles on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11659542May 7, 2025
ELECTRICAL SYSTEM
ICCU failed for a second time and needed to be replaced. This happened within 24 hours of the initial replacement. There is a major problem with this part. Car was parked in my garage charging when the failure occured.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11659280May 6, 2025
ENGINE, POWER TRAIN
One month ago, my car experienced an failure and the warnings on the dash reported to check the electrical supply and then to stop driving the car immediately. I had it towed to a dealership who reported the ICCU failed and it'd take 1-2 weeks to get replacement parts and repair. A month later, I was just told the part is on indefinite back-order and they have no ETA when a replacement part will be available. Hyundai is selling an unsafe vehicle without that can die on the road and have no way to fix the issue. Google "Hyundai ICCU failure" and you'll see this is a systemic problem and Hyundai is doing nothing to fix these issues and is putting out 2025 models that are dying on the road with no solution.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657736April 30, 2025
ELECTRICAL SYSTEM
Vehicle suddenly lost power. Towed to Hyundai dealer. Diagnosed as ICCU failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657639April 29, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
This morning I heard a "pop" sound from the back of my 2023 Ioniq 5. A short while later a warning message appeared about the cars electrical system. A minute or two later a "Stop Vehicle and check power supply" message appeared. The infotainment screen said "A possible condition has occurred with your vehicle. A full system check is recommended TODAY." This is likely a malfunction of the ICCU. I have already taken this car in 2 or 3 times for recalls related to the ICCU, including one dealership visit within the last 30 days. As this is an electrical vehicle, electrical problems could leave me stranded. Without propulsion I would be at risk of getting hit on the highway. The same error message appeared at the service center. The car has been at the dealership all day, and I don't expect to get it back anytime soon. There was no warning of the failure before today.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656292April 23, 2025
VEHICLE SPEED CONTROL, POWER TRAIN, ELECTRICAL SYSTEM
Vehicle stopped responding to all inputs while cruising on the highway. Vehicle was charged and running fine up until that point, for about 40 minutes of continuous driving. Accelerator pedal, regen paddle shifters, cruise control buttons all would not work and display was unresponsive. Vehicle slowly lost speed as if it was shifted into neutral, forcing us to pull over to the side of the road. Turning vehicle off, waiting for a minute, and turning it back on restored functions. Vehicle malfunction occurred right after a busy intersection on LA highways and we were able to make it to the shoulder, but if it had happened just 1-2 minutes earlier, we would have been in a lot of traffic merging in and out of lanes at significant speeds. There were no warning lights, messages, or auditory alerts during the occurrence. Vehicle simply lost all power. When I took it into the dealer for inspection the next day, the service staff were unable to find any issues or errors during diagnostics. Battery health was in the green and vehicle checked out fine and was released to me after a thorough inspection.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656219April 23, 2025
FUEL/PROPULSION SYSTEM
The iccu failed causing the vehicle to suddenly go into limp mode
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656196April 22, 2025
ELECTRICAL SYSTEM
The ICCU failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656078April 22, 2025
ELECTRICAL SYSTEM
The contact owns a 2023 Hyundai Ioniq 5. The contact stated while driving 45 MPH, the message "Electrical System Failure - Please Stop the Vehicle" was displayed and the vehicle unintendedly decelerated and failed to exceed 25 MPH. The contact pulled into a parking lot and the vehicle was towed to a dealer where the vehicle was diagnosed, and the contact was informed that the Integrated Charging Control Unit (ICCU) had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 53,131.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655942April 21, 2025
ELECTRICAL SYSTEM
ICCU failure after the recall was updated.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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