Hyundai Ioniq 5 Complaints (2025)

290 consumer complaints on file.

#11738604May 18, 2026
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, LANE DEPARTURE: ASSIST
The vehicle’s driver monitoring / Forward Attention Warning system repeatedly gives false inattentive-driver warnings during normal highway driving, even when I am actively watching the road and driving normally. The system does not appear to function reliably with ordinary sunglasses and common driving conditions. The issue happens frequently when wearing sunglasses. The system incorrectly determines that I am not paying attention, despite looking directly ahead at the roadway. When this happens, Highway Driving Assist and lane-centering functions may disengage or become unavailable. This occurs in normal daytime driving conditions and appears overly sensitive to environmental factors, including reflections, lighting conditions, and driver seating position. I typically receive multiple false warnings during a single drive. This is a significant safety concern because: Driver assistance features can unexpectedly disengage during highway driving. The repeated false warnings are extremely distracting and can result in drivers ignoring or becoming desensitized to alerts. There are many similar owner reports online describing the same issue with Hyundai’s driver-monitoring system. Hyundai has issued a technical bulletin describing the problem but has made no indication that it intends to fix this significant flaw. My vehicle's software is fully up-to-date.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11738555May 18, 2026
ELECTRICAL SYSTEM
ICCU or other electrical issue. The problem was confirmed by dealer. Car was towed after it would not start.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11738548May 18, 2026
ELECTRICAL SYSTEM
The iccu (Integrated Charging Control Unit) failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11737562May 13, 2026
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Heard a pop sound, drove three-mile back to house, with car throttled speed to 20 MPH on 35 MPH roads. Leased 2025 Ioniq 5 at 4553 mi. Once back, completely died, vehicle wouldn't lock, start or move. We had vehicle towed to Dealer (20 miles away). No warning lights, no notices. The vehicle needs a new ICCU, the associated fuse and a new 12-volt battery. This is a known recall for the Ioniq 5 2020-2024. When leasing this 2025, we were assured the problem was fixed on the 2025 - Clearly that is not the case. This is ridiculous- it should be a recall and fixed proactively rather than a crash potential hazard for the driver.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736931May 11, 2026
ELECTRICAL SYSTEM
The ICCU failed just before the vehicle had 20k miles on it. It failed on a warm afternoon with about 77% SOC after not being charged for more than 24 hours. Immediately after starting the car with the push button ignition, I heard an audible "pop" come from the back of the passenger cabin followed up by a "Check Vehicle Electrical System" message on the dashboard. There was no warning prior to this issue and the vehicle had been driven approximately 5 miles around town about an hour earlier. I can confirm the failure was the ICCU because the 12V batter stopped receiving charge thereafter confirmed by me watching the battery voltage drop for about 10 minutes. The vehicle has not been assessed by a dealership yet as of this writing.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736145May 6, 2026
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
The ICCU went bad. I am not able to charge it at my house, because it causes the breaker to trip. It does successfully charge at a charging station. But then I learned the power could also go at any point and leave me stranded. The local Hyundai dealer (Burns Hyundai) cannot even look at my car for a month. I discovered that Hyundai has known about this issue for four years and doesn't have a real solution, just replaces the part with another of the same one. The car is not safe to drive at the moment, but I also feel like it will never be trustworthy on a longer drive as long as there's no real fix. Along with the dealer, I reported this twice to Hyundai customer service.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736141May 6, 2026
STEERING, FORWARD COLLISION AVOIDANCE: WARNINGS, UNKNOWN OR OTHER
The emergency steering will engage at random times. The car makes a loud noise, a light on the dashboard illuminates, and the car will try to drive into another lane. This happens at least once a week, and it has never happened when there was another car around, so I wasn't about to get into a collision. It has happened when there is construction and the lane markers are unclear, when the road is a little wet and other times I can't explain. I have always been able to shove it back into the lane I want to be in, but this also seems incredibly unsafe. It could drive me into any sort of situation involving other cars or off the edge of a road. I've Googled and I am not alone in experiencing this problems. I reported this twice to Hyundai customer service.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735686May 4, 2026
FORWARD COLLISION AVOIDANCE: WARNINGS, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
A collision occurred when the vehicle failed to detect a stationary stop‑sign pole directly in front of it. The forward collision‑avoidance system did not provide any braking assistance or intervention before impact. The vehicle is equipped with the full safety and driver‑assistance package, including camera and radar‑based collision‑avoidance features, so the system was expected to recognize an obstacle in the vehicle’s path. The failure created a safety risk because the vehicle did not respond to an object directly ahead, and the driver relied on the advertised safety features to help prevent or mitigate such collisions.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735454May 4, 2026
AIR BAGS, SERVICE BRAKES, ENGINE
On April 20th while parking the vehicle suddenly had a power surge crossing over multiple curbs and across a parking lot and landscaped areas and hitting a tree. The vehicle refused to brake and the driver airbag never deployed.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11735345May 3, 2026
ELECTRICAL SYSTEM
Integrated Charging Control Unit failure. Common issue apparently and I've been waiting over a month for a repair. No loaner offered. Could not guarantee that it won't happen again as it's a "common issue. "
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735342May 3, 2026
ELECTRICAL SYSTEM
ICCU / 12‑V failure & repair – 2025 Ioniq 5 (Illinois) Bought my 2025 Ioniq 5 new in Feb 2025. On 4/21/26, at about 8,653 miles, I suddenly got a red battery icon and “Stop vehicle and check power supply” while driving. I pulled over, limped it home, and it wouldn’t reliably go into READY. Bluelink showed DTC P1A9096 (Electric Vehicle / “Air Flap”), so I had it flat‑bedded to Happy Hyundai of Libertyville. They confirmed ICCU/12‑V system failure. On 4/29/26 they completed the fix under recall/warranty. Key detail: they installed the latest ICCU revision, part# 36401‑1XAD6. They also replaced the ICCU high‑voltage fuse and the 12‑V battery (Interstate H5).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734920April 30, 2026
ELECTRICAL SYSTEM
1. The repair work was done at San Leandro Hyundai service department. I do not have the parts that were worked on. 2. Fortunately, both incidents happened when the car was parked at home. The unpredictable nature of the issue though, raises safety concerns as it's unknown when the car is going to die. 3. I have repair orders from San Leandro Hyundai service department of the error codes and repair work conducted. 4. Unknown. I assume the dealership sent the faulty ICCU back to the manufacturer. 5. For the first incident, yes, there were brief notifications on the dashboard about the battery discharging. That was happening for a couple of months prior to the car dying the first time, Feb 9, 2026. For the second incident, no there were no warning messages before the car died the second time Apr 27, 2026. SUMMARY OF INCIDENTS Incident #1 — February 2026 — ICCU failure, vehicle towed to dealer — DTC P1A9096 fault code identified — 22 days out of service — ICCU assembly and high voltage fuse (H110) replaced — 12V battery tested healthy but not replaced, despite Service Advisor Alexa's explicit assurance that replacement was standard protocol for this repair type — Rental reimbursement of $209.96 still outstanding — Maintenance warning appeared approximately one month post-repair; dismissed by resetting service clock with no diagnosis Incident #2 — Current (April 2026) — 12V battery drained to 0%, vehicle completely unresponsive, towed to dealer — Hyundai app showed 47% battery and 'all systems normal' at point of complete failure — D00 fault code identified on 12V battery; sensors reactivated and battery recharged — Traction battery range reduced approximately 50% (~150 miles vs. expected ~344 miles); attributed to battery learning reset, root cause unknown — 4 panic notifications received from Hyundai app on April 30, 2026 while vehicle is in dealer's possession — cause unknown
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734887April 30, 2026
ELECTRICAL SYSTEM
The contact leased a 2025 Hyundai Ioniq 5. The contact stated that while driving at 25 mph, the battery warning light, reduced power warning light, and an unknown warning light depicting a vehicle with an exclamation mark illuminated. Additionally, a "stop vehicle and check power supply" message appeared, and the vehicle lost power. The driver steered to the side of the road, and the vehicle was towed to a dealer. It was diagnosed that the ICCU unit and ICCU fuse were defective and needed replacement. The vehicle was repaired, and the manufacturer was notified of the failure. The failure occurred at approximately 82,069 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734831April 30, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
ICCU failure at 6,126 miles. Vehicle went into limp mode and had to be towed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734383April 28, 2026
ELECTRICAL SYSTEM
While backing out of my driveway at less than 5 mph, I heard a sudden loud pop noise from the rear of the vehicle, immediately followed by a dashboard warning: 'Check Electric Vehicle System.' Since I was still in my driveway, I was able to safely park and exit the vehicle. There were no injuries and no other vehicles or property were involved. The vehicle was undriveable and required towing to the dealership. The dealer diagnosed the failure as a defective Integrated Charging Control Unit (ICCU) and replaced the unit. The vehicle was out of service for approximately 6 days.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734318April 28, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
While driving on [XXX] , I heard a 'pop' towards the rear of the car. A dashboard warning appeared notifying me of an electrical fault. The car went into 'limp' mode, which allowed me to drive no faster than around 25 mph. Fortunately, I was within a half mile of my home, so I was able to do a U turn and return home. I called a tow truck, which towed the car to the local Hyundai dealer in Lebanon, NH. This was a Saturday in February, 2026, so dealer inspection did not occur until the following Monday. The dealer confirmed that the problem was a failed ICCU assembly and the associated high voltage fuse. 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
#11733719April 25, 2026
ELECTRICAL SYSTEM
ICCU blew while driving and immediately slowed me to 45 mph
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733713April 24, 2026
ELECTRICAL SYSTEM
Vehicle shut down with minimal warning due to “integrated charging control unit” failure. Vehicle left my wife stranded on rural road. Current mileage is 12k.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733575April 24, 2026
ELECTRICAL SYSTEM
ICCU failed and blew high power fuse. Car displayed warning and only drove slowly. I went to the selling dealer and they confirmed the ICCU and fuse failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733134April 22, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I was driving on the highway when the car suddenly flashed a “check power supply” warning and then immediately shut down. I was traveling approximately 55 mph when the car came to a sudden stop and I was almost rear-ended as a consequence. I was not rear ended because I had a wide shoulder to immediately pull over onto, but if this had happened in a location without a shoulder, it likely would have caused an accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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