The Integrated Charging Control Unit (ICCU) failed on my 2025 Hyundai Tucson PHEV at approximately 6,600 miles. The failure manifested through multiple concurrent symptoms. First, the vehicle displayed a "car not charging" warning light and completely refused to accept an electrical charge when plugged into a charger. Simultaneously, the Check Engine Light illuminated on the dashboard. While driving, the vehicle experienced a sudden and unsafe loss of propulsion power when attempting to drive uphill. This sudden drop in power created a hazardous driving condition in traffic. The vehicle was taken to an authorized Hyundai dealership, where technicians ran diagnostics and officially confirmed that the ICCU had failed and required a complete replacement.

Source: NHTSA complaint ODI #11744295 · view all complaints for this vehicle at nhtsa.gov

Advanced Driver Assistance System not listed: "Forward Attention Warning" I recently purchased the 2025 Hyundai Tucson PHEV Limited and on a road trip the next few days later I tried to activate the cruise control when all of a sudden a few seconds later it gave a warning and shut off. I tried again and it did the same thing. I had to pull over, check the setup menu and even though this is a process to deactivate the system it DOES stay active. After researching this online and looking up the Hyundai Manual, when you activate cruise control it automatically activates lane assist which automatically activates the Forward Attention Warning which, at that point, deactivates the cruise IF you are either wearing sunglasses or blocking the view of your face from the steering column camera using say your arm. The "assistance" does not allow you to drive with your arm at the top of the steering wheel, I was getting tired using both arms on each side and had to give one of my arms a rest only to realize this was an issue and couldn't. Add to this that it was sunny and could not use sunglasses as the camera couldn't see my eyes. I researched this online and there's several recent videos and Reddit messages across various platforms that this is a major issue for people and a serious risk for some as they can not use sunglasses on sunny days and the fact it automatically deactivates after a while. All it would take is to actually have this fully deactivated where it's listed in the Driver Assistance section.

Source: NHTSA complaint ODI #11686862 · view all complaints for this vehicle at nhtsa.gov