The Hyundai Ioniq 5, one of the best-selling electric vehicles in the U.S., has encountered an issue with its charging system. According to Consumer Reports, some owners are experiencing failures in the Integrated Charging Control Unit (ICCU), which manages the charging of the 12-volt battery.

This problem isn't limited to the Ioniq 5. Similar cases have been reported for the Hyundai Ioniq 6, Ioniq 9, Kia EV6, EV9, and the Genesis GV60. Since these brands share common components, the defect has affected multiple models.

A survey indicates that between 2% and 10% of Hyundai and Kia EV owners have reported ICCU issues. For comparison, other electric vehicles from the 2023–2025 model years show such complaints at 1% or less. When the ICCU malfunctions, drivers may see dashboard warnings, experience reduced power, or even lose propulsion entirely. Manufacturers have already issued recalls and worked with suppliers to address the defect, but reports of failures continue to surface.

If a "charging error" notification appears, owners are advised to contact their dealer. Should the vehicle enter a limp mode, it's recommended to pull over and call for a tow.

Despite these concerns, in road tests by Consumer Reports, the Ioniq 5 scored higher than the Tesla Model Y. However, recurring problems have impacted the brand's reliability rating. Overall, electric vehicles show about 80% more issues compared to gasoline models, while hybrids remain the most reliable type of powertrain.