Electrical system failure. Available for inspection upon request. While driving, warning appeared on dashboard. Warning said, "Stop Vehicle and Check Power Supply" The safety of vehicle occupants and others on the road was put at risk. I lost control of the vehicle in the middle of traffic due to the loss of electrical power. The problem has been confirmed by San Leandro Hyundai as part of the Safety Recall for the Integrated Charging Control Unit, Recall number 272. NHTSA Recall number 24V-868. The recall repair was completed but the ICCU was not replaced and is still defective. A few minutes prior to the eletrical failure a warning message appeared on the dashboard. The warning message said, "Stop Vehicle and Check Power Supply". First appeared on Saturday January 11th at 4PM (PT).

- Oakland, CA, USA

On December 22, 2024, I went out at 8 AM to have breakfast with my dad. On the way back, I noticed my car starting to slow down, and the "turtle mode" activated. Normally, this mode only occurs when the battery level is under 1%, but my battery was at 75%. As I tried to park in a safe location, the car suddenly lost power and displayed a warning instructing me to stop due to an electrical problem and to contact service. I was able to safely stop at a small shopping center plaza and called Hyundai's towing service. When the towing company arrived, they found they couldn-??t turn the car on and had to use a wheel-lift tow method. Unfortunately, I had to wait nine hours for the car to be towed. The car was dropped off at the dealership on December 22, 2024, but it wasn-??t checked until December 31. By the end of the first week or early in the second week of January, I was informed that the replacement ICCU (Integrated Charging Control Unit) had arrived. However, due to the dealership's schedule, they said they wouldn-??t begin the installation until the following Tuesday, with hopes of completing the work by the end of that week. This incident was especially frustrating because I had already experienced an ICCU failure in January 2023, just nine months after purchasing the vehicle. At that time, no one could explain why the ICCU component had failed, and now I-??m facing the same issue again.

- Lansdale, PA, USA

The vehicle has no power whatsoever. Upon approaching the vehicle, it did not unlock. I used the physical key to open the drivers door. I then tried starting the vehicle only to have the gauge and center display flashing on and off with a red warning That the 12v was dead, to pull over and top immediately then the displays turned off. There are no lights or power to the vehicle no whatsoever. It cannot turn on any of the interior lights or even power door locks. This means only the front doors can be opened or locked and the vehicle will obviously not move. The 12v battery system has been a continuing issue with the vehicle. It has been repaired and the subject of several recalls during my short ownership and is still a problem. Due to a blizzard, I have been unable to have the vehicle taken to the dealership and have been without transportation for 3 days already with no clear resolution from Hyundai.

- Lawrence, KS, USA

The ICCU on my Ioniq 5 failed without any warning from the car or mobile app. All recalls were performed on the vehicle prior to it failing. I was unable to charge the vehicle on level 1 or level 2 charging. The dealership replaced both the ICCU and fuse on the vehicle.

- Hamilton, NJ, USA

12 V battery died after being plugged in to charge overnight. The 12V battery was replaced in May 2024 due to a similar issue. It seems that the ICCU recalls and software updates have not been fixing the problem.

- Ithaca, NY, USA

Open ICCU Fuse, car would not charge

- Walnut, CA, USA

Hyundai has absolutely dropped the ball on this Ioniq 5's ICCU and 12V battery issue. After numerous recalls to fix a hardware problem through a series of software fixes that don't work and refusal to give a loaner for loss of use, I would like to pursue a buyback option for this vehicle. On Tuesday, [XXX], I went to Napleton Valley Hyundai in Aurora, IL to complete RECALL CAMPAIGN #272 NHTSA RECALL # 24V868000. After the recall, my 12V battery went dead on Wednesday, [XXX] and had to be towed to dealership. Their only solution was yet another software update and then charge the 12V and said it was ready for pickup on Thursday, December 5. I told them then to also do a wheel alignment and they said during that process, the 12V battery went down again. They then charged it back up and gave it back to me and said it was good. I encouraged them to pursue a better solution but they had no interest. So, it was picked up on Friday, [XXX]. On Saturday [XXX], the 12V battery went dead again and will have to be towed back to the dealership. Over the phone, my service advisor said it would have to be charged and released. If this issue then happens again, then a replacement might be considered. Calls to Hyundai North America headquarters have not yielded any results and they claim they need 3 business days to assign my case while I have no working car. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Lisle, IL, USA

Received an error message upon starting car that said "stop vehicle and check power supply". Had car towed to dealership.

- Selden, NY, USA

Hyundai issued TSB 22-01-094H for my vehicle which is an update to the battery management system, , but after 4 attempts Hyundai dealerships have still not been able to complete the TSB. Hyundai corporate has also not helped after multiple cases. After many hours of research, I have determined that my vehicle's BMS software was updated to an intermittent version (version 700x) that does not support this TSB via automatic update, and the correct BMS Rom (version 540x) must be selected manually, which the dealerships are unwilling or unable to do.

- Omaha, NE, USA

Hyundai of Fort Myers Repair Order Number [XXXX] Dear NHTSA Team, I am reaching out to formally report a significant safety concern involving our Hyundai Ioniq 5, which recently experienced an Integrated Charging Control Unit (ICCU) failure. This malfunction occurred despite our vehicle receiving all relevant software and hardware updates that Hyundai implemented to address this known issue. This experience has caused our family considerable distress and has raised serious doubts about the reliability of this model, as well as the adequacy of Hyundai-??s current safety measures to prevent ICCU failure. While my wife and young daughter were in the car, the ICCU failure occurred suddenly, producing a loud pop that alarmed us all, particularly my daughter who was seated in the rear. She has since expressed fear about riding in the Ioniq 5, making it clear that this issue has impacted her sense of security in the car. Despite the updates Hyundai has issued, the failure occurred without warning, putting us in a vulnerable situation and highlighting that the current remedies may be insufficient to prevent this risk. The gravity of this problem is amplified by my wife-??s critical health needs. She is currently on the waiting list for a kidney transplant, and our family requires a dependable vehicle to ensure she can be transported quickly and safely to her medical appointments and, when the time comes, to the hospital for her transplant. We cannot rely on the Ioniq 5 for these crucial needs given our recent experience with this unexpected breakdown. I am requesting that the NHTSA investigate this issue, as our experience suggests that Hyundai-??s current measures to address ICCU failure may not adequately safeguard Ioniq 5 owners. A comprehensive review of this problem could be critical in ensuring the safety of other drivers and families who may be unknowingly exposed to the risk of sudden vehicle malfunctions. We hope that the NHTSA will consider further action

- Fort Myers , FL, USA

Today when I was driving down a canyon going 40 mph, the car started coasting and the accelerator was unresponsive. I couldn't keep the car from decreasing speed and regen braking wasn't working either. I don't know whether it's related, but this happened within seconds of me turning off daylight savings time in the menu. I coasted to a safe place to pull over (the brakes worked fine), but I could not get the accelerator to work after switching from drive to park to drive again. After turning the car off and then back on, the accelerator again worked like normal. After continuing driving, I turned daylight savings time on and off a few times, but nothing adverse happened.

- Boulder, CO, USA

While we were driving the Ioniq recently when it suddenly lost all power. We had a very brief warning on the dash that it was losing its power; we barely had enough time to pull onto a side street. It lost power so quickly we couldn't position the car properly and it stayed in the middle of the side street until the tow truck came and jumped the 12 volt battery enough to get the car into gear so it could drive up the tow truck ramp. The scary part was that we were only a block away from turning onto busy Highway 522 when it died. Had the car died on the highway we could have been stranded in a very unsafe position. The dealer later diagnosed the problem as a failed ICCU and 12-volt battery and replaced both. We had to rent a car for 3 days.

- Seattle, WA, USA

Car on 2 separate occasions once parked the other while in motion discharged unexpectedly and would not start. I was later notified by a contracted service station that the 12V battery is discharging and needs to be replaced or serviced by dealer. These events only started happening after a recent recall update was done to the vehicle for battery management. Warning signs on the vehicle said 12v voltage low stop safely.

- Jonesboro, GA, USA

After all the recalls and TBS that Hyundai has performed on this car to prevent any ICCU failures I still had the failure after all the updates. Last week after AC charging to 80% (7.6kw) the car thru an error code to check EV when starting up. It was only yellow so I attempted to drive it. Within 1/4 block the error code was flashing red and a warning was given to pull over and stop. Since I was only a block away I made it back home. The car had to be towed to the local dealer. Upon inspection they retrieved error code P1A9096 that said the ICCU failed. The ICCU fuse was also blown (open). This did not cause a safety issue this time but if I would have been on the road who knows. Also the replacement ICCU appears to be the same part number as removed? I do not believe Hyundai fully understands the issue and software updates have only corrected or is masking some larger issue.

- Silver Lake, MN, USA

On Saturday, [XXX], at approximately [XXX], I drove my 2022 Hyundai Ioniq 5 north on [XXX]. The car was operating normally. I stopped at the red light at the corner of [XXX] and noticed a large red circle with a "Check electrical system" warning on the driver's display screen. When the traffic light turned green, I pressed the accelerator pedal, and the car did not move. I looked at the "Park, Neutral, Reverse, Drive" shifter. The "P" was lit up, indicating the car was in "Park." I attempted to switch to "Drive, " and the status indicator remained in "P." I then pushed the "EV START STOP" switch to see if I could cycle the vehicle off and then back on to clear the problem. The switch had no effect. [XXX] is a busy four-lane, undivided street near the University of Colorado at Boulder campus. I selected the hazard flashers and called 911 to alert the Boulder Police Department that I was in a car that was immobilized in the middle of the right-hand northbound lane. Cars had to swerve to avoid me. The Police Department dispatched a vehicle that arrived 10 minutes later, pulled up behind me, and put its flashing lights on to alert traffic. While waiting for the tow truck, I received another alert on the driver's display that informed me that the 12-volt battery was nearly completely discharged, and I had 10 minutes of power left. The warning counted the remaining minutes to 0, and the displays shut down. From the first warning message to the shutdown, I could not turn the car system off or shift the car out of the park. The tow company had to put dollies under the rear wheels of the Ioniq 5 and lift the front end off the ground to tow the vehicle, as all four wheels were locked. The car was towed to Crossroads Hyundai in Loveland, Colorado. It had just been serviced to address all the recall issues, including the ICCU software update. The car has approximately 16,000 miles on it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Boulder, CO, USA

A warning to check electrical system was displayed. The battery did not have sufficient charge to drive it to a dealer so I tried to charge and the car would not charge past 60%. I was able to drive the car to the dealer where they diagnosed a failed EV battery. Prior to the failure the car would use battery percentage much faster than it should have. For example, a fifteen mile drive would deplete the battery 25 miles. The dealer still has the car waiting to replace the battery.

- Silverado, CA, USA

The Integrated Charging Control Unit failed. My vehicle would not accept a level one or level two charge. You would have to remove the rear seats to inspect. No one-??s safety was put at risk. The problem has been confirmed by a dealer. The vehicle has not been inspected by the manufacturer, police, insurance representatives or others. There were no warning lamps, messages or other symptoms of the problem prior to the failure. No warning lamps appeared at all.

- Boca Raton, FL, USA

What component or system failed or malfunctioned, and is it available for inspection upon request" The ICCU failed. The car won't charge on a level 1, 2, or 3 charger. The failure happened in the middle of a charging session. Since failing when trying to charge the car says "charging unsuccessful". The dealer has had the car for 28 days and won't tell me when it will be fixed. How was your safety or the safety of others put at risk? Yes. My family. Thankfully the failure happened in our garage. If it had of happened when we were away from home we would have been left stranded unable to charge. Also, if the ICCU fails while driving the car loses all power and comes to a stop. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. It has been at the dealer for 28 days Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? It has been inspected by the dealer Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear" No, there were no warnings prior. All ICCU related recalls had been performed.

- Delmar, DE, USA

When charging the car on level 2 charger at 40 amps, the connector where the charger plugs in overheats. Based on updated software the car reacts by turning off the charging, but I am concerned it may not always do that and the connector would overheat and fail. Also the car is not fully charged as it should be. This occurs perhaps 1 out of 2 or 3 charging sessions. Hyundai is aware of this but has chosen not to address the issue beyond shutting off charging, which is not an acceptable response. The local dealer appears to be unaware of the problem. They indicated I would have to pay for them to inspect it and only be reimbursed if the issue is under warranty

- Montpelier, VT, USA

This has happened twice so far. I was driving down the street on the main road and the check evs error came on with a yellow triangle -??? light came on. Suddenly the car slowed down, it was hard to steer but I was able to get it to a neighborhood near the school before it shut down. It scare me to know what would have happened if that was on a freeway. Now, because of the fear I hardly drive the car. The last time this happened was yesterday.

- Murrieta, CA, USA