What 25 owners told NHTSA about the 2026 Hyundai Ioniq 9 Bev

My 2026 Hyundai Ioniq 9 (Performance Calligraphy AWD), leased new in late April 2026 from Team Hyundai of Bend, OR, suffered an Integrated Charging Control Unit (ICCU) failure at approximately 1500 miles in late June 2026, roughly two months into ownership. The failure progressed over several days. First, at a ChargePoint Level 2 (AC) station, the vehicle repeatedly displayed "charging started" every few minutes in a continuous start/stop/retry loop. Within days, AC charging failed completely: the vehicle reported "charging unsuccessful" on two separate EVSEs (a hardwired Level 2 charger and the Hyundai portable charger) across two different circuits. DC fast charging still worked. No other dashboard warnings were displayed. The dealer diagnosed a failed ICCU and replaced the unit. The vehicle was out of service for approximately 2 days thanks to the dealership's great service team. Luckily we were not out on a road trip which we have planned in the next 2 weeks which would have left us stranded with a newborn. This is a documented, ongoing safety defect across Hyundai, Kia, and Genesis E-GMP vehicles. ICCU failure can cause the 12-volt battery to stop charging, leading to reduced power or sudden loss of motive power while driving, which creates a crash risk. NHTSA previously opened an Office of Defects Investigation into this issue, and Hyundai issued recalls 24V204 and 24V868 to address it. What makes this report significant: the 2026 Ioniq 9 uses the second-generation ICCU that Hyundai represents as containing the corrective hardware changes. My failure occurred on this redesigned part, on a vehicle barely two months old, which indicates the underlying defect has not been resolved in current-production vehicles. This is the family's primary vehicle and we have a newborn at home, so the loss of use was a significant hardship. I am filing so this second-generation ICCU failure is on the record and counts toward any future investigation or recall action.

NHTSA ODI 11746752

Vehicle was operating perfect then got alert indicating electrical system fault but vehicle still drove (was just 2 miles from home ) but then alarms sounded and just able to pull off road before vehicle died. Checked and see code DTC PIA9096 and car was inoperable after. Towed to dealer for replacement of ICCU module. They acknowledged they have seen this before. I was on a local road, but if this happened on a highway, would have been more hazardous!

NHTSA ODI 11731046

Failure of the ICCU during normal driving conditions. The vehicle was controllable, and driver was able to bring the vehicle to a safe location as vehicle performance deteriorated. The failure left the driver and passenger without power during a storm in an unfamiliar area. After about 45 minutes of waiting for roadside assistance, the vehicle lost all auxiliary power and no functions were available (including lights and door lock controls). Vehicle was towed to a local dealership, where issue was diagnosed and part has been replaced. The failure was not preceded by any significant event. Warnings present on the driver's information panel while driving.

NHTSA ODI 11730311

The vehicle was plugged in overnight. To the set 80% limit. When I got up to leave for work and take family out. The vehicle check electrical system warning ️ came on and the then the vehicle would not drive past 41mph. Then in a few minutes dropped down to 28mph and would not go any further. Took the car to dealership which was miles away and 18 miles per hour was my top speed when I pulled in to the dealership lot. This was one day after I had dropped the car off for a route 7K mile tire rotation and filter change. They claimed they topped off fluids. I keep reading that the ICCU is failing on the Ioniqs and this symptoms seem to match. I am now waiting on diagnosis to be done Tuesday or Wednesday this week of the 5th.

NHTSA ODI 11708703

While driving on the freeway utilizing Highway Drive Assist, I suddenly received a warning on the heads up display stating that assisted systems were unavailable, at which point the Adaptive Cruise Control & Lake Keep Assist both deactivated. I pressed the button on the steering wheel to reactive the system and received "conditions not met" error. At this point, I placed my foot on the accelerator and it was completely unresponsive. I stabbed at hte accelerator as well as held it down without issue. Regenerative breaking also did not reactive. Fortunately, I had enough momentum to change lanes safely to the shoulder and power cycle the car. I took the car to my local dealership who did a brief test drive and could not recreate, returning the car to me without contacting Hyundai proper, and recommending I call them directly myself.

NHTSA ODI 11705434