Jun 13, 2026Electrical systemFuel system
On XXX, at approximately 2:20 PM, while driving about 30 mph on a suburban road in [XXX], a red battery warning light appeared on the main instrument cluster. I pulled over and contacted Hyundai support. When I attempted to resume driving, the vehicle accelerated sluggishly with noticeably reduced power. I pulled over a second time and parked with the vehicle still powered on. While I was on the phone with Hyundai roadside assistance, a red ‘Stop vehicle and check power supply’ warning message appeared on the dash, and the vehicle completely lost power several minutes later, becoming inoperable. It had to be towed to a Hyundai dealership. Weather was clear and road conditions were normal. There was no crash, fire, or injury. The vehicle had approximately 3,770 miles at the time of failure. As of this report, the dealer has not yet completed diagnosis. The symptoms are consistent with the integrated charging control unit (ICCU) failure pattern widely reported in Hyundai EVs, but this has not yet been confirmed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI 11743940
Jun 2, 2026Electrical systemFuel system
The Integrated Charging Control Unit (ICCU) on this vehicle produces loud whirring noises when charging at 80% or above. This has been documented in writing to the service department. The ICCU defect is a known systemic issue across the Hyundai and Kia EV platform. The vehicle is currently scheduled to return to the dealer for this and other defects. This is the second major service visit on a vehicle leased in March 2026 that was already out of service 28 consecutive days for a sunroof failure.
NHTSA ODI 11741651
Apr 10, 2026Transmission & drivetrainElectrical systemFuel system
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
Mar 22, 2026Electrical systemFuel system
Suspected ICCU failure. Progressed rapidly to car being immobile. Known issue not being addressed by Hyundai.
NHTSA ODI 11726175
Mar 5, 2026Electrical systemFuel system
The vehicle was being driven on a city street when it suddenly felt sluggish and lost acceleration ability. It would not drive above 43mph in a 50mph zone. The display showed the error "Check electrical vehicle system". After getting home a mile away and turning it on, driving was tested again after about 30 minutes. Upon entering drive mode, it beeps rapidly and displayed "Stop vehicle and check power supply". Battery would not charge, with the vehicle announcing "Charge unsuccessful". The Hyundai app shows an ELECTRIC VEHICLE DTC P1A9096 and DTC Sub System: Air Flap (which appears to be incorrect since the air flap is functional and it's an ICCU failure). The dealer inspected and diagnosed the issue as an ICCU failure, requiring a new ICCU and fuses. Parts are on backorder with availability unknown.
NHTSA ODI 11722307
Dec 16, 2025Transmission & drivetrainFuel systemLane Departure
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