*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Electrical system
The vehicle experiences catastrophic, recurring 12V auxiliary battery discharge and complete electrical system collapse due to a suspected repeating failure of the Integrated Charging Control Unit (ICCU). The vehicle was previously serviced for identical 12V power-loss failures and recall interventions in June 2025. Despite those prior repair attempts, the defect has recurred aggressively, resulting in four separate 12V battery collapse events in October 2026 (specifically on October 10, October 13, October 17, and a complete breakdown requiring a flatbed tow on October 19). This defect presents an extreme safety hazard: when the ICCU fails to step down high-voltage power to maintain the…
Oct 19, 2026Electrical system
"stop vehicle and check power supply" came in from nowhere, The vehicle was fully charged and there were no previous issues noted. The charge quickly dropped down to about 8% After that. I searched for the error message online and learned about a recall specific to this exact year, make and model. The recall was related to this exact issue. I towed it to a dealer at 7300 Broadway, Denver.
Oct 18, 2026Electrical system
My partner drove it towards location about 1 mile away. Partner had driven it about 3 miles each way just a few hours earlier. Also drove it about 5 hours earlier in the morning, then I drove it about 10 miles. I charged it at home L2 (6.8kW) successfully hours before partner drove it and experienced the problem. Partner said it had low power after starting, then expected power. Drove about 1 mile then the Stop Safely and Check Power Supply displayed on the dash. Partner pulled over and parked the car and contacted me. I contacted Hyundai Roadside Assistance to have the car towed to the dealership. AAA towing service driver was able to start the car and drive it onto the flatbed. Drop off…
Sep 29, 2026Steering
My wife experienced a sudden loss/reduction of power-steering assist while driving the Ioniq 5 on [XXX], accompanied by warning indicators with "Check Driver Attention Warning (DAW) system". Vehicle required towing. Fault subsequently disappeared and could not be reproduced at the Hyundai dealership service department at Alexander Hyundai in Oxnard, CA. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Sep 11, 2026Unknown or other
Vehicle stopped responding at freeway speeds. Pedals didnât do anything. Slowly pulled over and off freeway powered off car and back on again. Was able to continue driving home. Almost got stuck in the middle of the freeway
Aug 25, 2026Fuel/propulsion system
Failure of the iccu. Needed complete replacement under warranty. Unable to charge via any AC charger. The iccu had already been repaired under an existing recall.
Jun 23, 2026Electrical system
After car has been parked, when trying to start car , car turns on briefly saying 12 v battery low come to safe stop. Then car dies. Car isnât in motion since itâs been parked. First time it happened I needed a tow truck and the tow truck needed to jump my battery. Since then battery keeps dying when trying to start this has happened every time I start the car since July 11 2026
Jul 11, 2026Power train
Was driving to vegas, it was 103-107 degrees After fast DC charging drivetrain had issues that when pressing acceleration the car would have almost a loss in power that caused a stuttering movement. If forcefully driven, the error message drivetrain electrical system would pop up. Issue can be resolved but only after letting the car stay in park for 10-15 minutes after finished charging. Issue was repeatable but only if weather was hot enough. This shouldn't happen or at least warn the driver to not drive for a certain period instead of guessing the issue.
Aug 9, 2026
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
