2025 Hyundai Ioniq 5

On [XXX], the vehicle was unable to be started - no lights, no power, unable to open the doors. I called Hyundai Roadside Assist and they sent someone from AAA a few hours later who was able to "jump start" the vehicle. I took it to the dealer, Manly Hyundai, on December 17th, 2025 and they determined nothing to be wrong with either the battery or the electrical system. On [XXX], while driving from home to the local grocery store, the car presented a warning light on the dash and the “gas pedal” stopped working. I was able to coast into a parking lot at which point an even larger warning light appeared and the vehicle then lost all electricity completely. I again called Hyundai Roadside Assist and they sent someone from AAA a few hours later who determined that the car was unable to be “jump started” and would have to be towed to the local dealer, Manly Hyundai. The dealer reported back to me that the component that failed is called an “ICCU” and is some kind of controller related to the charging and motors of the electric drivetrain. It is available to be inspected at the dealer currently, Manly Hyundai. My safety was put as risk because the car became essentially inoperable while driving downhill and gave no warning signs ahead of time before the lights lit up on the dash and I lost control. The dealer has confirmed that it is an issue with the “ICCU”. The dealer has inspected the component at their service department. The first warning light that appeared came at the same instant that the vehicle lost drive power. The second warning light that appeared came at the same time that the vehicle lost all electricity entirely. There were no indications that something might be wrong with the vehicle prior to the vehicle actually producing symptoms of being undriveable. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2025 Hyundai Ionic 5. The contact stated that shortly after purchasing the electric vehicle, while charging the battery there was a loud banging and the battery failed to charge. The vehicle was driven to the dealer, who diagnosed that the Integrated Charging Control Unit (ICCU) had failed and needed to be replaced. The ICCU was replaced, but the failure reoccurred. The vehicle was returned to the dealer under the State Lemon Law Act. The manufacturer was notified of the failure. The failure mileage was 200. The VIN was not available.

The car is a brand-new 2025 Ioniq 5 with only 2,949 miles. All of a sudden and without warning, it entered "limp mode" while driving and did not go past 25 miles per hour. I was close to home so luckily I was able to street park it safely. Called roadside assistance and the car completely powered off (died) in front of the tow truck. The dealership says it is an ICCU failure and need to be entirely replaced. The part is backordered with no ETA for replacement.

The Integrated Charging Control Unit (ICCU) failed. While driving, we heard a 'pop' noise from the rear, which was a blown fuse. Immediately after, alarms were sounding, display showed electrical system failure, and car would only drive in turtle mode (extremely limited speed). Car was drivable for approximately 100 feet and then totally died. Car needed to be towed to dealer for repair.

My electrical warning light came on for the second time in under a year. The first time I was pulling out of my driveway, so I was able to stop safely. This time I was a block from my house, so I was able to safely pull to the side of the road. In both cases the car was towed to the dealership and both were confirmed to be a bad ICCU. The first time I was able to get it fixed within the week. This time the dealership has said the part is on back order and there is no ETA.

On 1/15/2026, my 2025 Ionic 5 Limited AWD car with 11K miles on it suddenly lost power about 1/2 mile from my home. I pulled over to the side of the road and within seconds the car was totally dead (nothing worked). After waiting 1 1/2 hours (in an unheated car with outside temperatures in the 30's (F)) the car was towed to the dealership, where the ICCU was determined to be the problem. The dealership apparently has 3 other Ionic's waiting for new ICCU's. My car has been in the shop ever since, waiting for the replacement ICCU to be delivered to the dealership (delivery is apparently expected sometime in the next couple of weeks).

Battery warning light went on as I left my house. Since this is an EV, naturally became concerned. Car was towed to Heritage Hyundai, Towson Md and I was later informed by the technician the ICCU went bad and this was a common problem for the Hyundai/Kia EVs which Hyundai/Kia have not fixed. The car is currently at the dealer's service department.

Diagnosis: ICCU and fuse failure. Situation: 1/17/26 No issues starting when starting/driving car to first store. Car started without issue and I drove to next store a few minutes away. Came out of store to start car and got a notification on dash to check electric vehicle system. Checked app and had error P1A9096 Air Flap Turned car off for a minute, turned car back on and still received the same error. Tried to drive back to house (only about 6 miles away) and realized the car was limited to 25 mph although no indication/notification of limit. Notification continued and I ended up getting a stop vehicle and check electrical system with flashing lights. Stopped and cycled off and on the vehicle a few times. Started vehicle and only check electrical system notification was on (no indication not to drive vehicle so I continued driving). Continued driving and heard what I believe was a pop noise and also got the notification to stop vehicle and check system. Pulled over turned vehicle completely off and checked app again. and Still only PA9096 error. Contacted Hyundai roadside. Truck driver contacted me shortly after letting me know they were on the way. Tried to turn vehicle around in parking lot so easier to tow. Vehicle limited to 1 mph. Vehicle died when I got in spot and wouldn't turn back on. Vehicle towed to dealer. 1/28/26 Over a week after issue, dealer diagnosed as ICCU and fuse failure.