Hyundai Ioniq 5 Complaints (2025)

290 consumer complaints on file.

#11714305January 29, 2026
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
The Integrated Charging Control Unit (ICCU) component of the 2025 Hyundai Ionic 5 with less than 6 months and 5,081 miles of driving failed. This failure was noted by the warning systems in the car indicating car needed to be stopped and not driven. (Photo attached in later section) Further information indicated a very limited distance to drive before complete car shutdown late at night. The ICCU component failure has been confirmed by the dealership service department where the car was purchased. No warnings were noted before the ICCU failure. This ICCU component failure seems to be common enough to be a known failure, but the frequency has not been made public.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714304January 29, 2026
ELECTRICAL SYSTEM
Backing out of a parking space, I heard a loud pop sound from the back of the cabin. A electrical warning showed in the dash to check the charging system. The vehicle was limited to 22 mph and I limped home. Just short of getting home, a warning alert sounded and the dash displayed an alert to stop the vehicle and park. Vehicle was towed to the dealer, who diagnosed it as an ICCU failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714070January 28, 2026
ELECTRICAL SYSTEM
While driving at normal city speeds, the vehicle suddenly displayed a warning message stating “Stop vehicle and check power supply,” accompanied by a red battery warning indicator. Shortly after the warning appeared, the vehicle entered a reduced-power or “limp” mode, with severely limited acceleration and speed. This created a safety concern as the vehicle could not maintain normal traffic flow. The high-voltage traction battery state of charge was normal at the time, indicating the issue was not related to battery depletion. Prior to the failure, there were no unusual driving conditions, accidents, or modifications to the vehicle. Ambient temperature was cool but within normal operating conditions. Due to the loss of power and safety risk, the vehicle was not driven further and was towed to an authorized Hyundai dealership for inspection. The problem was confirmed by the dealer, who diagnosed a failure of the Integrated Charging Control Unit (ICCU), which manages charging and power conversion between the high-voltage system and the 12-volt electrical system. The dealer determined that the ICCU requires full replacement. The vehicle remains at the dealership awaiting parts and is available for inspection. The failure resulted in sudden loss of drivability without prior meaningful warning, posing a potential hazard to the driver and surrounding traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714038January 28, 2026
ELECTRICAL SYSTEM
On Friday evening, my 2025 Hyundai Ioniq 5 was parked at a ferry terminal in central NJ in cold (~32°F), windy conditions near water. At approximately 6:20pm, I remotely activated climate control using the MyHyundai app. When I entered the vehicle around 6:25pm and attempted to start it, the dashboard immediately displayed “Stop vehicle and check power supply” and “Check electrical vehicle system.” The MyHyundai app reported diagnostic code PIA9096, which is widely reported by other owners as an ICCU failure. The vehicle became completely inoperable, could not be shifted into neutral, and could not be jump-started. I attempted boosting the 12V battery and AAA also attempted, with no success. Both AAA and Hyundai Roadside Assistance refused to tow the vehicle because it could not be placed in neutral, leaving me stranded in freezing conditions and forced to abandon the vehicle overnight in a public lot. The following morning, I installed a brand new 12V battery, which allowed the vehicle to power on, but the same electrical errors remained. The vehicle was then towed to a Hyundai dealer. After several days, the dealer confirmed diagnostic codes PIA961C, PIA9096, and P056216 and diagnosed failure of the ICCU and high-voltage fuse. The dealer ordered ICCU assembly 36400-1XAD5 and high voltage fuse 375F2-GI040. The dealer cannot provide any ETA for parts and stated the vehicle will be inoperable until repaired. I am informed by many other owners that multi-week or multi-month delays are common for this same failure nationwide. This failure resulted in a sudden, total loss of vehicle function, left me stranded in unsafe conditions, and made the vehicle impossible to move or tow normally. This appears to be a known, systemic defect affecting Hyundai EVs across multiple model years. Vehicle is currently at Hyundai dealer and available for inspection.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714009January 28, 2026
ELECTRICAL SYSTEM
While driving, all of a sudden I got a "Stop vehicle and check power supply" message on my dash and the car slowed down. I could not accelerate. It was dangerous as I was driving during commute time. I had the car towed to the nearest Hyundai dealership. The car completely died (no power) while parked at the dealer parking lot. After diagnosing the car, the technician said it was an ICCU failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713960January 28, 2026
ELECTRICAL SYSTEM, POWER TRAIN
ICCU failure. Vehicle was not able to be operated over 40mph creating significant safety risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713812January 28, 2026
ELECTRICAL SYSTEM
The ICCU was confirmed to have failed while I was driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713544January 27, 2026
POWER TRAIN
ICCU failed. ICCU fuse blew limiting power making car unsafe to drive.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713518January 27, 2026
POWER TRAIN, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
The ICCU in my Hyundai Ioniq 5 failed catastrophically today ([XXX]) after only 3109 mlles. I believe this to be the case because: • I heard a loud pop from behind me in the car. • The car immediately lost power and would only go very slowly. • An alert about the electrical system immediately came on and told me to stop driving as soon as possible. • A rather loud alarm sounded. • DTC P1A9096 appeared in my Bluelink app. All these point to a failed ICCU. 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
#11713499January 26, 2026
ELECTRICAL SYSTEM
The ICCU chip failed. This chip communicates between the propulsion battery and the smaller, traditional 12v battery. The chip failed, and the car thinks the propulsion battery is dead. This is very common occurrence I have learned, the ICCU chip is continuously on back-order.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713461January 26, 2026
ENGINE, ELECTRICAL SYSTEM
ICCU FAILURE. Went to start vehicle (at full charge) and warning light came on "Check Battery Health". Wouldn't move, got towed to service center. Diagnosed as an ICCU failure. Car is 6 months old, 9,400 miles on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713302January 26, 2026
ELECTRICAL SYSTEM
Battery electrical system, car gave warning to stop and park immediately , and stalled in the middle of the street while trying to make a turn, with no way to move it, or put it in neutral.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713165January 25, 2026
UNKNOWN OR OTHER
ICCU unit failed and was eventually replaced
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713102January 24, 2026
ELECTRICAL SYSTEM, POWER TRAIN
While driving in traffic I heard a loud pop coming from the rear of the vehicle. A warning light came on on the dash board and the vehicle immediately slowed to about 10 mph. This was a dangerous situation as I was actively passing a vehicle on the highway and could have ended up colliding with oncoming traffic!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713067January 24, 2026
FUEL/PROPULSION SYSTEM
ICCU failure while driving my kids to school. Heard pop sound and then dashboard showed electric system failure, car went limp mode and finally died on side of the road
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712987January 23, 2026
ELECTRICAL SYSTEM
ICCU failed during drive. Eventually died in the middle of the road. Took a month to fix
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712912January 23, 2026
POWER TRAIN, ELECTRICAL SYSTEM
On [XXX] my there was a loud pop from the rear of the vehicle and electric vehicle warnings popped up on my dash. I turned around at the light, and as I drove I could tell that the vehicle was slowly losing power. Speed was limited to 30mph. Barely made it back home before the warnings on the dash told me to immediately stop driving. Vehicle was towed to the dealership, and they informed me on January 8, 2026 that the ICCU had went out and blown a fuse, so they needed to replace both. The car is unable to be driven until this is replaced. The current odometer reading is 3,390 miles. I called yesterday, January 21st and was informed that Hyundai has the ICCU on backorder and it will be at least two weeks before they can update me again. I've reached out to Hyundai Motor America National Consumer Affairs. They stated: 1) No recall exists for this issue and claim this is only impacting 1% of vehicles. 2) The supply of ICCUs was depleted in December 2025 and have been on backorder since. 3) There are no plans to redesign the ICCU to prevent failures so this could very well happen again, and as there are no indicators as to what causes it to malfunction it is making the vehicle unreliable. They have 'escalated' this but I likely will not get the vehicle back for a few more weeks. 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
#11712887January 23, 2026
FUEL/PROPULSION SYSTEM, POWER TRAIN
As I was driving on a very busy city street I heard a loud pop and then got a warning to check electrical systems. Luckily I was able to get the car to a Walmart parking lot and arrange for the car to be towed to a dealer 90 miles away. The dealer contacted me and informed me the ICCU unit and high voltage fuse would have to be replaced and no time frame for parts availability to be determined. This is apparently a recurring problem with the ICCU component of Hyundai electric vehicles that could potentially leave a driver stranded in the middle of nowhere in the middle of winter.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712804January 22, 2026
FUEL/PROPULSION SYSTEM, ELECTRICAL SYSTEM
Failure of ICCU charging unit and Level 2 charging failure consistent with the description in this article [XXX] 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
#11712600January 22, 2026
ELECTRICAL SYSTEM
While driving, I heard a popping sound from the backseat area, and immediately experienced a sudden loss of power. Warning sounds came on and a dashboard warning to check the power supply. I was able get home on back streets with a maximum speed of 23 mph before the vehicle lost all power. I had it towed to the local Hyundai dealership where they diagnosed a failed ICCU unit. As of this writing it's been two weeks and I am still waiting for the part to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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