Hyundai, Kia ICCU Recall Fails: Owners Sue Over Persistent EV Power Failures

Hyundai, Kia, and Genesis electric vehicle (EV) owners continue to face persistent power failures linked to the Integrated Charging Control Unit (ICCU), despite manufacturer recalls. A new class action lawsuit alleges that replacement ICCUs may be just as defective as the originals, leaving drivers stranded with issues such as 12-volt battery drain, limp mode, and total power loss.

ICCU Failures Plague Hyundai, Kia, and Genesis EVs

The ICCU is a critical component that manages charging between the high-voltage battery and the 12-volt system, ensuring both operate in harmony. When the ICCU fails, the vehicle can become inoperable, effectively turning into a "giant brick." Despite recalls issued by Hyundai and Kia to address these issues, the lawsuit claims the replacements have not resolved the problem.

Class Action Lawsuit Targets Hyundai, Kia, Genesis, and Supplier

The lawsuit, filed in the U.S. District Court for the District of New Jersey, names Hyundai Motor Company, Kia, Genesis Motor, and Hyundai Kefico—the supplier of the charging control units—as defendants. The affected vehicles include:

• 2022–2024 Kia EV6
• 2022–2024 Hyundai IONIQ 5
• 2023–2025 Hyundai IONIQ 6
• 2023–2025 Genesis GV60
• 2023–2025 Genesis Electrified GV70
• 2023–2024 Genesis Electrified GV80

Owners Report Persistent Issues After Recall Repairs

Two plaintiffs, Hayes Young of New Jersey and Roy Williams of Kentucky, allege that their recall repairs failed to resolve the ICCU-related problems.

Hayes Young reported that his 2023 Hyundai IONIQ 5 SEL experienced a dead 12-volt battery in December 2025, requiring a warranty replacement. However, the problem recurred, and the dealer reportedly identified the ICCU as the cause, yet no further action was taken.

Roy Williams said his leased 2025 Kia EV6 entered limp mode after a loud bang, necessitating a tow to the dealership. Despite attempts to resolve the issue through battery charging, software updates, and even a battery replacement, the problem persisted. Eventually, the ICCU was replaced in March 2026, but the issue remained unresolved.

Additional Complaints Highlight Charging and Warning Issues

The lawsuit also cites owner complaints involving:

• Damage to charging plugs during home charging
• Dashboard warnings such as "Check Electric Vehicle System"
• "12-volt battery voltage low" alerts, requiring drivers to stop safely

Automakers Have Not Yet Responded to the Lawsuit

As of now, none of the defendants—Hyundai, Kia, Genesis, or Hyundai Kefico—has responded to the lawsuit. In similar cases, automakers typically file a motion to dismiss, but this process may take several days or longer before any further action is taken.

"The central grievance isn’t that these cars have problems. It’s that they allegedly keep having them after a recall was meant to put the matter to rest."