2024 Hyundai Ioniq 5 Other Problems

Your car's 12-volt battery suddenly died while you were driving, causing the vehicle to stop completely with no power and no tail lights working. This created a dangerous situation on the road since other drivers couldn't see your vehicle and you were stranded for an hour waiting for a tow truck. The car was able to run again after a jump-start, but there were no warning signs before the failure happened. The fix will likely involve replacing the 12V battery and having the electrical charging system inspected to prevent this from happening again.

Your car's integrated charging control unit (ICCU) failed, causing a battery warning light to appear several hours before the vehicle stopped working completely. Your car became inoperable and required towing to a service facility. The ICCU will likely need to be replaced or repaired by a technician.

Your car lost all power while driving and went into a reduced-power "turtle mode," then displayed a message telling you to stop immediately and have the vehicle towed. After diagnosis, the dealership identified a failure in the Integrated Charging Control Unit (ICCU), which manages your car's battery charging system. Fixing this will likely require replacing the ICCU module at the dealership.

Missing a spot weld point on liftgate frame panel and rood panel. Also, the panel gaps are open widely compare to left and right side. No accident happen, I am from a collision center, I found these factory defects.

Car would not turn on in the morning. Replaced 12v battery. After battery replacement, received "CHECK ELECTRICAL SYSTEM" warning message. Car was able to be driven, but could not be driven faster than 25mph. Taken to dealer where it was confirmed the car's ICCU malfunctioned and would need to be replaced.

On January 17, 2026, I was driving my Hyundai Ioniq 5, when it began to decelerate and lose power while I was pressing the accelerator pedal. The deceleration progressed. A small flashing battery icon appeared on the upper display. This icon had never been on the display before. Fortunately, I was traveling downhill and able to safely pull the car over to a stop. I turned the car off. I restarted the car with the same issue recurring. I turned the car off and called the dealer and scheduled an appointment. After about 5 minutes I restarted the car and was able to safely drive home without further incident. The dealer checked the car out and determined that nothing is wrong with it. The dealer was unable to replicate the problem. I have no confidence in continuing to drive the car safely as a loss of power could cause a serious accident. I contacted Hyundai USA customer service and a case was opened. They closed the case explaining that since the dealer found nothing wrong there is nothing they could do. Thank you.

On January 28th 2026, I got red warning signs on dashboard said: "Stop vehicle and check power supply" and "12V battery voltage low. Stop safely". I was still in the parking lot, so the issue did not pose any safety issue. The vehicle towed to Hyundai dealership. They confirmed and pre-approved "Replace ICCU +fuse". The part is on 1 month back order. While the dealership initially did not commit to giving me alternate transportation, I insisted and after 6 days, I was able to get a much lower class and smaller replacement vehicle (Hyundai Venue with entry level trim). My vehicle is a lease. Since I'm paying for enjoying the vehicle amenities for a limited time, and my vehicle will not be available for at least a month, I requested Hyundai to reimburse me (or let me skip) lease payments until my vehicle is usable again. So far, the company has denied my request.

Horn keeps breaking and doesn't work dealer said this is a known issue. This will be my second time replacing it when I schedule appt maybe water keeps getting inside it and ruining it? Please fix this it is a safety hazard

On Monday morning (3/24/2025), my 2024 Hyundai Ioniq 5 lost power and I received the "Check electric vehicle system warning." After that I received another warning that said, "Stop vehicle and check power supply." The car had lost most of its power by this point, but I was less than a mile from my house, so I was able to make it home by turning the car on and off every couple of blocks. It was towed from my house to the dealership the same morning, where it's been ever since. I was just informed that the ICCU needs replacement. My understanding is that this is a prolific problem with this car, and I'm very concerned because my car is less than 8 months old and has less than 8,000 miles on it.

Car won't super charge. ICCU has been backordered for a month.

Car will randomly start giving warning messages (while driving or parked). Messages include pull over and check brake system, lane departure system failure, check battery, the speedometer will read 0 while driving, among multiple others. Dealership has ' fixed' multiple times, replacing fuses, bumper, sensors, but the problem keeps happening

I took my 2024 limited Ioniq 5 to the dealership [XXX] to have a TSB looked at and because on [XXX], I took out the cabin air filter out of the car, as I have been noticing a smell of chemical in the cabin of the car. I noticed that the filter was covered in blue windshield wiper fluid and smelled of the same chemical smell as what my wife and I had been smelling and what I believe has been giving us headaches on long trips when driving to San Antonio, Texas to visit our grandson over the last two months. The Technicians at the Hyundai Dealership where I took my car had conducted an inspection and found the filter was covered in windshield fluid and noted that it is most likely caused by a defect in manufacturing or design within the vents where the fluid drains. Which also means that rainwater or water from washing the car could also be going into the cabin air filter housing. The dealership informed me that they have taken pictures and will forward to Hyundai as part of the process however they believe that this could result in a recall, as they noted that there is not a fix, they can provide to stop the fluid from going into the housing and that it is a health risk among other things. They noted that they believe this to be on the new 2024 models as they have not had the issue on the 2022-2023 models. I am concerned that drivers such as myself are being exposed to the effects of inhaling these fluids which include Headaches, blurred vision, vomiting and other unpleasant effects related to inhaling the vapors from this fluid. I only have this one car and cannot simply avoid driving it in weather where I would have to use my wipers and fluid. I would like to have this defect corrected ASAP to avoid any long-term health effects. The dealership was unable to provide a loaner vehicle and I have to wait until Hyundai is able to work a solution or more people complain about it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)