Hyundai Ioniq 5 Complaints

1,350 consumer complaints on file.

#11741501June 2, 2026
STEERING, VEHICLE SPEED CONTROL, ELECTRICAL SYSTEM
This is the second time the ICCU failed. The car is waiting for a full EV battery replacement. The first time the failure happened on 12/11/25, at 9,165 miles, the alert happened just before the car came to a full stop as we were driving along the road near our house, it was very difficult to steer, we were sort of stopped in the road and had to get it towed. The second time the alert came on 4/16/26 and we were able to get it to the dealer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741290June 1, 2026
UNKNOWN OR OTHER
All symptoms of a 2nd iccu failure. Pop noise heard. Warning lights came on 12v drained, vehicle towed to nearest dealer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741280June 1, 2026
ELECTRICAL SYSTEM
The ICCU failed to charge the car via level 1 (120VAC or 240VAC), but does charge using public DC chargers. Fortunately the issue occurred at home so no traffic issue occurred, in this case. The level 1 charger indicated a fault and would not charge the car. I drove the vehicle without any issues to a public charger and established that the DC charging is working. Hyundai repair center diagnosed the problem and confirmed that a repair is needed. I am currently awaiting a repair. The fault was diagnosed on January 22, 2026 and as of June 01, 2026 no repair has been done.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741000May 30, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, POWER TRAIN
Vehicle was parked in closed garage overnight. In the morning I tried to start the car and it was unresponsive. key fobs, digital keys, NFC cards none of them were able to open the car. Used a physical key to open the door, and then tried to turn the car on, nothing worked all screens remained black and car was unresponsive. AAA confirmed that the 12V battery was fully dead. When they jumped the vehicle we heard a pop in the car, which is a known ICCU failure indication. The car still turned on and was drivable. I got it to the dealership safely and they confirmed that the 12V battery was fully dead and car only turns in if jumped. They also confirmed that the ICCU had a failure as well and they are going to need to replace the entire battery pack/ICCU assembly.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11740966May 29, 2026
BACK OVER PREVENTION: WARNINGS, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Vehicle: 2026 Hyundai Ioniq 5 Description of Safety Defect:The Reverse Parking Collision-Avoidance Assist (PCA-R) system exhibits a severe software logic flaw that creates an immediate traffic hazard. When a standard, hitch-mounted bike rack is installed, the vehicle’s rear sensors detect the rack as an imminent collision obstacle while in reverse. The system responds by executing an abrupt, violent emergency brake application, bringing the vehicle to an unexpected dead stop. The primary safety failure is a lack of non-volatile memory retention for driver settings. In the infotainment system under "Parking Safety," a driver can manually deselect or disable the "Rear Safety" automatic braking feature to accommodate hitch accessories. However, this setting completely resets to "Enabled" by default every single time the vehicle is restarted. Safety Risk & Real-World Consequences:This defect has caused multiple documented near-miss incidents. Specifically, when attempting to reverse off a main roadway into a driveway with cross-traffic present, the vehicle suddenly slams on the brakes due to the bike rack. This leaves the vehicle unexpectedly stranded and protruding into active lanes of traffic, nearly causing severe rear-end and T-bone collisions with passing vehicles. Requested Corrective Action: Hyundai must issue a software update changing the ADAS memory logic. The Reverse Parking Collision-Avoidance Assist state should persist in the exact state it was in when the vehicle was last turned off (Last-Mode Memory). If a driver explicitly disables the feature to safely operate a bike rack or hitch accessory, it must remain disabled until the driver intentionally re-enables it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11740761May 29, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
The ICCU failed on my 2025 Ioniq 5 within 3 months of ownership and only 811 miles on it. The weather that morning was slightly chilly but not cold. I turned on the car and put it into reverse and after backing up only a couple feet, I heard a pop and the "Check Vehicle Electrical System" message and warning light came on. I had not DC fast charged the car since owning it and had only charged it on level 2 chargers at about 9.6kw to 12kw. The car was not charging the night before the issue occurred and had not been on the charger for several days previously as the battery level was around 70%. There were no issues or symptoms before prior to the failure. The car was towed to the dealership and the ICCU and high voltage were replaced under warranty. This is a major issue with the car and it keeps on happening to eGMP platform cars. The same issue happened with my 2023 Ioniq 5. Hyundai is not providing any information to consumers if they have actually identified the cause of the frequent failures or have manufactured a new part that corrects the manufacturing defect. Please direct Hyundai to issue a statement if they have found a fix or there needs to be a major recall until they identify and correct the underlying problem with the ICCU.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11740340May 27, 2026
STRUCTURE:BODY, UNKNOWN OR OTHER
The Moon Roof glass, which is not designed to open, developed a non-impact, or stress fracture. Since it is not supposed to open, the glass is a structural part of the vehicle. It was not cracked when I first took possession of the vehicle, and since I did not open the interior screen all winter, I never noticed the crack. I reported it to the dealer, but it did not take responsibility or offer a replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11740117May 26, 2026
TIRES
TIRE SIZE 235 / 55 R 19. Vehicle is a 2024 IONIQ 5. Issue began at/around 10k miles of use. Sound dampening foam inside of the tires comes loose and bunches up in the tire, creating varying degrees of car shaking and vibration. At its worst, the steering wheel and tires violently shake, especially between 50 - 75 mph. On the highway this causes a very dangerous situation of the driver fighting the wheel to remain safely within their lane. This can happen with no warning (or very little) as the vibration may be subtle at lower speeds on local roads, only to become unexpectedly extreme and violent while speeding-up to join highway traffic. Local Hyundai dealership inspected and tried rotating and balancing which did not fix the problem. Finally they removed the tires and inspected the foam which fixed the issue on one single tire. Cost was passed to the consumer, who is not at fault. And with only one tire addressed, the potential remains for each tire to experience the same failure without warning as time goes by. This is a very dangerous issue, well known as evidenced by complaints since 2023 online, and is going to cause accidents. It is unacceptable that drivers have risk their safety and that of other drivers if they lose control of the car due to the inability to control the steering wheel. Then have to pay to fix this issue or pay for new tires after only 10-12k miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11739712May 23, 2026
STEERING, ELECTRICAL SYSTEM, VEHICLE SPEED CONTROL
I was driving on a busy highway at a high but legal speed. For a few seconds the vehicle appeared to reset. I lost control and the screen went blank. It was a miracle I did not hit another vehicle. I contacted the dealer and they stated unless it was happening frequently - there is nothing they could do. I spent hours on the phone with the dealer attempting to schedule an appointment, they stated their EV person was not available. I contacted Hyundai customer service. They ignored me for months. They assigned me a contact person - but she would never return my calls. I called the main support number and started over after several months. This representative collected all my info - title, purchase receipt, etc - but then closed my case after a couple calls. They totally ignored the concern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11739646May 22, 2026
ELECTRICAL SYSTEM, POWER TRAIN, FUEL/PROPULSION SYSTEM
Car indicated 12v battery was critically low and that I should stop safely. I was just starting it in a parking lot. This is a classic ICCU failure and the car is up to date on all recall updates. The car requires manual key unlocking for outside access at this point, and the rear hatch is only unlockable using the manual release mechanism which is recessed into the rear hatch and needs the key. The back two doors cannot be opened at all, from either direction and the handles don't work when the electrical system has failed and the child lock was engaged accidentally when it happened. This legitimately terrifies me for anyone traveling with back seat passengers who need quick exit. There isn't one.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11739295May 21, 2026
LANE DEPARTURE: ASSIST
The Driver Attention Warning system fails every time I put the car in Cruise Control. I have adjusted my seat and the steering column but no relief. I have removed my hat and sunglasses with no relief. I have my hands at 8 and 4. The DAW IR tracking causes a visual warning in the dashboard and then a horrific cacophony if I try to ignore the warning. Two weeks ago an OTA was downloaded which purported to improve the sensitivity of head movement. It is not improved, if anything it is quicker to warn. In settings I turned off the Lane Following Assist and Driver Warning Assist each time I start the car. This does nothing to impact the failure of the DAW. The lack of Cruise Control on long drives causes fatigue and does not help with safety. The constant harassment of the DAW warning does not lend to safer driver. This whole system is intrusive and not making driving safer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11738922May 20, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
The Integrated Charging Control Unit (ICCU) failed on my 2023 Hyundai Ioniq 5. The vehicle stopped charging prematurely overnight via AC Level 2 charging and then refused to charge again at all. The ICCU is responsible for maintaining the 12V battery by topping it up during normal operation. No warning or check engine light came on, I was only made aware when I attempted L2 charging and the car would refuse to take the charge. I understand that with a failed ICCU, if I'm unaware of the failure (e.g., relies solely on DC fast charging which bypasses the ICCU), the 12V battery can deplete without warning while the vehicle is in motion, potentially causing sudden loss of vehicle systems including power steering, brakes, and other safety-critical electronics. The vehicle was parked at the time charging failure was discovered. No injuries occurred.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11738816May 19, 2026
ELECTRICAL SYSTEM
Our *2025* Hyundai Ioniq 5 experienced a complete failure of the ICCU (Integrated Charging Control Unit). The car displayed numerous warnings including "Check brake system", "Check 12V battery. Stop safely and engage parking brake", and "Check parking distance warning system". The car stopped working completely and would not turn on again. A towing company had to be called as the car was completely inoperable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#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
#11738598May 18, 2026
ELECTRICAL SYSTEM
The vehicle flashed a warning and suddenly lost power, forcing me to pull over or be stuck in the middle of the road. The vehicle could no longer be driven, as this problem occurred quickly after subsequent restarts. I had the vehicle towed to the dealership, who confirmed it was a broken ICCU, and stated that this had been happening a lot to the Ioniq5s. The replacement part was on backorder. It ended up taking nearly 60 days for the replacement to arrive and to be installed.
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
#11738416May 17, 2026
ELECTRICAL SYSTEM, POWER TRAIN
The ICCU died a second time
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11737714May 13, 2026
SERVICE BRAKES, ELECTRICAL SYSTEM, LANE DEPARTURE: ASSIST
Unknown. It just happened in November and i called Hyundai but they didn't want to fix it. I haven't been able to use my car properly since then.
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

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