Hyundai Ioniq 5 Complaints

1,350 consumer complaints on file.

#11700677November 20, 2025
FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: ASSIST
Several times now the "Check Driver Assistance System" and "Check Lane Assist System" have come on and stayed on. I brought the car dealership, and they fixed it--but only temporarily--the problem recurs within a few days of the fix. All of the sensor cameras are clean. I have read that a weak 12-volt battery can cause this problem, but the car has only 28k miles on it, so the battery should not be weak yet. I will bring the car back to the dealer (again) and have them check the 12-volt battery strength. But I am at the point where the "check system" messages are on more than they are working correctly.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700370November 19, 2025
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
ICCU failure, confirmed by dealer. Vehicle was parked in garage connected to charger. The ICCU fuse blew, and the house breaker was tripped. The vehicle failure also ruined the Grizzl-E EVSE (charger).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700113November 18, 2025
UNKNOWN OR OTHER, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
Despite going back to the dealer to address the issue, and trying all the recommended modifications, the Forward Attention Warning (FAW) goes off repeatedly when the car is utilizing adaptive cruise control. I have written and called Hyundai National to ask to defeat this feature and it is not allowed. This FAW alarm (ironically) diverts my attention from driving as I am having to constantly respond to the alarm. I need the adaptive cruise control in certain situations and Hyundai will not allow me to override the FAW when the car is in adaptive cruise control. Other cars allow for this feature to be fully defeated (e.g. Toyota Prius Prime). I am worried I will have an accident because I am distracted by this alarm going off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700053November 18, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I was driving down the highway at about 65 mph. "Electrical failure" warning showed up and the abruptly began to lose power. We were able to pull over 2 lanes to the shoulder. The car then completely shut down after about 2 minutes. I was unable to have my hazards on and 2 young children in car seats were in my vehicle. I was on a really bad part of the road and had to move two young children into another car and barely had enough power to get over. The dealer told me I just had a bad battery and they replaced it and it was fine. I called Hyundai corporate and they said "they weren't aware of any issues with the cars ICCU" it wasn't until my husband called the dealer again and had to be extremely pushy with them that they saw it was an ICCU failure. They are replacing it now.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699879November 17, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
The Integrated Charging Control Unit (ICCU) failed - the car is no longer capable of driving due to the lack of ability to charge the battery. I was able to get it to the repair center. The ICCU on this model can fail in multiple ways, which includes the vehicle becoming inoperable at highway speeds. The issue first started 2025/11/13. I tried multiple charging units. It flipped the breaker on my home charger and caused issues for a public charger.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699832November 17, 2025
FUEL/PROPULSION SYSTEM
ICCU failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699614November 15, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
ICCU failure randomly while driving. Left me stranded during a cold night until a tow truck could come. Dealer has confirmed ICCU failure and Hyundai is repairing under warranty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699543November 15, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I was driving to work on the morning of Nov. 12th, 2025 in East Greenwich RI. The car had been fully charged on my home Level 2 charger the night before. It was a chilly morning so I turned on the heated driver seat and steering wheel. Less than a mile from my house, and without any warning or prior issues, I heard a loud pop from underneath the vehicle. Immediately the car displayed an error on the dash reporting electrical system issues. The car still seemed driveable so I began to drive back home, noting that the car wouldn't exceed ~30 mph, but before I went very far at all the error changed to "Stop vehicle and check power supply." I pulled the car over on a side road and called for a tow to the nearest Hyundai service center in North Kingstown, RI. The next day the Hyundai service center reported that their diagnostics revealed that the ICCU had failed. I subsequently learned that they had been unable to drive the car even from their lot into the service bay - even with a jump charger the car wouldn't drive and they had to carry the scanner to the lot for the diagnosis. The Hyundai app reports 96% battery charge even now, which says that the 12V battery has been fully discharged, consistent with ICCU failure. The service center has not reported that the ICCU has been inspected by any other authorities other than them. The replacement part is due to arrive today, 11/15, and should be installed on Monday 11/17. This exact problem is apparently very common to Hyundai and Kia EVs, and was the subject of a recall for the 2022-24 IONIQ 5 model years.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699281November 13, 2025
FUEL/PROPULSION SYSTEM, POWER TRAIN, ELECTRICAL SYSTEM
Was driving for 12 miles, at a stop light. Light turns green, I accelerate, loud collision warning goes off and warning “battery overheated! Pull over safely and leave the vehicle”. Could not pull over safely because the car immediately ceased and locked up, car behind me nearly rear ended me and swerved to avoid. Is this another ICCU unit failure? Car towed to dealership (car has 2056 miles in it, it’s practically new) and been there for almost a month now with no repairs done and still diagnosing the problem. This car is unsafe.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699269November 13, 2025
ELECTRICAL SYSTEM, POWER TRAIN
Carr went into limp mode and wouldn’t drive more than approximately 10 mph in traffic. Once I was able to pull over and reset the ignition button, the car seems to be operating normally.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699196November 13, 2025
POWER TRAIN, UNKNOWN OR OTHER
EV battery failure. This is a known issue that Hyundai is refusing to acknowledge is a common problem on their cars.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699016November 12, 2025
ELECTRICAL SYSTEM
While driving, heard a pop sounds from back seats. Then a warning appears on front screen : Check Electric Vehicle system. The car lost all power and stopped beside the road. The car has only 14K kms on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698705November 11, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, POWER TRAIN
Even after the recall service performed, the ICCU still failed 10 months later. DTC P1E011C is listed and will not charge. This is the same issue for the KIA EV9 and a TSB needs to be issued the same as the TSB 339 KIA did for the EV9.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698701November 11, 2025
POWER TRAIN, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
On the first snowy day of the year, the car experienced an apparent ICCU failure. Loud pop followed by warning lights, reduced power and eventual complete shutdown of the car. Car has been towed to dealership for diagnosis and repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698601November 10, 2025
ELECTRICAL SYSTEM
ICCU failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698598November 10, 2025
POWER TRAIN, FUEL/PROPULSION SYSTEM
I heard a "pop" and then immediately saw "check electric vehicle system". The code I'm receiving in the app is P1A9096. The car was limited in driving speed, and I managed to get the car to the dealer before it stopped driving completely. I have about 8000 miles on this <1 year old car, and it seems like the ICCU has fried. Hyundai says this is under 1% of all cars, but from the internet it seems like this happens way more frequently. Reporting to the NHTSA so that there's record of this happening, given the frequency it seems to happen on the internet and the paucity of solutions (beyond putting in another faulty part) from Hyundai.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698290November 7, 2025
ELECTRICAL SYSTEM
The car would not charge. The Dealership where the car was bought assessed the problem and found out that the Integrated Charging Control Unit (ICCU) of the car had failed. They already replaced the component, however I am reporting this problem so as to be included in the statistics for this common problem with this Hyundai make.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698026November 6, 2025
ELECTRICAL SYSTEM
While charging at home with provided Level 1 Charger, the vehicle will suddenly stop charging. When it stops, it appears to be surging an electrical charge back into the home (black marks on outlets requiring an electrician to replace, black marks on the charger plug, and most recently, threw a breaker on our home electrical panel). This is a fire hazard.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697678November 5, 2025
VEHICLE SPEED CONTROL, LANE DEPARTURE: BLIND SPOT DETECTION
1. Component/System: One-pedal driving / regenerative braking (i-Pedal mode). Vehicle is available for inspecti On three separate occasions since leasing the vehicle in April, 2025, the vehicle failed to decelerate when i-Pedal mode was active and I fully released the accelerator pedal. Instead of slowing immediately as expected, the car continued maintaining speed for a few seconds before eventually reducing speed. In all instances, the accelerator pedal returned fully to its default position, and my foot was completely off the pedal. My foot was hovering over the brake and prepared to brake manually. This unexpected continued acceleration created a safety risk, particularly in situations where I anticipated immediate slowing. Safety Risk: This behavior increases the risk of rear-end collisions or reduced reaction time in traffic. It causes uncertainty in vehicle response and requires sudden manual braking when the system fails to operate correctly. Inspection/Reproduction: The dealership has inspected the vehicle and has denied existence of any issues. Warning Lamps/Messages: No warning lamps or messages appeared before or during the events. ⸻ 2. Component/System: Blind spot monitoring / driver assistance sensors Since acquiring the vehicle, the blind spot monitoring system routinely activates warnings when vehicles are more than one lane away, not in the adjacent lane. This results in frequent false warnings, especially on multi-lane highways. Safety Risk: The false alerts cause distraction and hesitation during lane changes. The system startles the driver and forces additional visual checks beyond normal safe driving practice, increasing cognitive load and reducing confidence in the system’s accuracy. Inspection/Reproduction: This behavior is frequent and occasionally reproducible. Warning Lamps/Messages: System behaves as if detecting vehicles in blind spot even when lanes are clear.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697499November 4, 2025
ELECTRICAL SYSTEM, VEHICLE SPEED CONTROL, FORWARD COLLISION AVOIDANCE: WARNINGS
I was coasting into a library parking space with my foot off the accelerator. The car accelerated even with my foot on the brake, jumped a curb and was stopped with above ground tree roots. The dashboard should have been lighted up with collision warning indicators and the automatic braking should have engaged. It did none of that. The car was totaled. Nothing was ever checked to see if it was a mechanical error. My insurer totaled the car.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0

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