2025 HYUNDAI IONIQ 5 Complaints

While driving, the car abruptly became unable to access the operational battery or to operate the vehicle.

While pulling out of the garage after charging our 2025 Ionic5 we heard a loud “pop”. As soon as we started driving we got a “Check Electrical System” message. We returned home and had our car towed to the Hyundai dealer. We were told that our ICCU failed and would need to be replaced. We are glad this did not happen while we were driving at speed. We are very concerned that Hyundai has a known issue with a critical component and has not resolved the issue.

When using cruise control the Driver Warning Alert sends visible and audible alerts (Keep your eyes on the road) even when I'm looking straight ahead, not wearing glasses, and not blocking the camera. I have tried multiple steering wheel angles and seat positions. At times I can drive for 30 minutes with no alarms but at other times it goes off every 30 seconds. This takes my attention away from my driving as I work on cancelling the alarm and puts me in a dangerous situation - exactly the opposite of its intended use. I have taken it to the dealer who claims there is nothing they can do about it even though two of their service reps told me they have the same problem. I have contacted Hyundai and they claim that the feature is acting as it was designed and refuse to fix it. On a long trip this can drive you crazy and forces me NOT to use cruise control which further takes my attention off of the road as I'm constantly monitoring my speed to avoid speeding.

On October 10, 2025, while driving the car, a turtle suddenly popped up in place of the speedometer. The car's power and speed was drastically reduced. There was a car behind me that started tailgating me and I could not go any faster than about 15 mph. I was able to make it home. Later that night, I tried to charge the car and it started to overheat. The ICCU recall need to be extended to 2025 models. Ours has been replaced, as well as the PCM and many other parts. Our car still sits at the Hyundai service center because they cannot figure out why the car won't charge.

The ICCU (Integrated Charge Control Unit) failed. Fortunately I was in a parking lot at the time, as the vehicle limited its top speed to around 25 mph. Had the failure occurred on a highway it could have caused a collision. While this is a 2025 model year Ioniq 5, the ICCU hardware (part 36400-1XAA0) remains unchanged across all Hyundai/Kia/Gensis vehicles sharing the eGMP platform. NHTSA previously issued recall 24V-868 intended to address such ICCU failures. While the modified software is included from the factory in the 2025 model year Ioniq 5, it appears that the 24V-868 recall is not a complete fix. Indeed, ICCU failure continues to be one of the most commonly reported owner issues, both for vehicles which have already had the “fix” from recall 24V-868 and for newer vehicles outside of the recall’s scope. This can be confirmed from the numerous posts and videos online (YouTube, Reddit, Ioniq forums, etc.). Given that ICCUs continue to fail at a significant rate, resulting in reduced vehicle speed and vehicle shutdown within minutes (as soon as the 12 V battery is exhausted), I strongly urge NHTSA to do the following: 1. Consider the current ICCU software update to be an ineffective remedy for recall 24V-868. 2. Broaden the scope of recall 24V-868 or create a new recall for all Hyundai/Kia/Genesis eGMP platform vehicles to address this defect. 3. Require that Hyundai/Kia/Genesis create and deploy a truly effective remedy for this defect.

Driving a loud bang was heard from the back of the car. Stopped to check, no obvious physical issue. A warning light came on, it was described as an issue with the air flap. Started driving again, it worked for a few 1000 feet. The car went into a limp mode while an arterial road, in the dark, slowing to not more than 20 mph on a 45 mph road putting driver and child passenger as well as other vehicles at risk. Had to limp until a driveway was found about 3/4 mile later. We got DTC P1A9096 code. The dealer confirm this was an ICCU issue and the related fuse was blown.

This morning my new Hyundai Ioniq 5 with 1900 miles made a loud pop noise and suddenly the car acceleration slow to almost a halt. Then the “Check electric vehicle system” warning light came up on the dashboard. From what I have seen from forums, this most likely a ICCU malfunction needing a replacement. This was scary because the car behind me could have crash into us since the car literally almost a full stop without any warning.

Heard a pop and received warnings of electrical failure. Car could only accelerate to 10 mph and battery eventually died. Towed it to the dealer and they confirmed that the ICCU failed and needed replacement.

The contact owns a 2025 Hyundai Ioniq 5 N. The contact stated that while driving at 40 MPH, the service battery immediate warning light illuminated. A dealer was contacted. The vehicle was taken to the dealer because the ICCU unit needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 8,000.

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.