Hyundai and Kia EVs Face Recurring Power Failures Despite Recalls

Published: February 18th, 2026

Thousands of Hyundai, Kia, and Genesis electric vehicle owners continue reporting sudden power losses while driving, even after multiple recalls and repairs aimed at fixing a faulty component that’s plagued the brands’ EVs for three years.

The culprit is the Integrated Charging Control Unit, or ICCU—a component that converts high voltage to recharge the 12-volt battery powering critical systems like infotainment, safety features, and vehicle controls. When it fails, drivers can lose power entirely, even with a fully charged main battery.

Consumer Reports found that between 2 and 10 percent of Hyundai and Kia EV owners experienced ICCU-related issues in its survey of 380,000 vehicle owners. That’s dramatically higher than the typical rate of charging problems for other EVs, which runs at 1 percent or less.

Key Takeaways

• A defective ICCU can cause Hyundai, Kia, and Genesis EVs to suddenly lose power.
• The problem has continued despite multiple recalls and repairs.
• Failure rates are significantly higher than normal for EVs.
• The issue affects the 12-volt system, which controls essential vehicle functions.
• Shared parts spread the defect across several models and brands.
• Reliability ratings have suffered even though the vehicles perform well otherwise.

What’s happening on the road

Owners report vehicles coming to “a dead stop on the road” in intersections and on highways, according to Corbin, a Hyundai Ioniq YouTuber who runs an owner Facebook group. The failures often strike without warning, leaving drivers stranded in traffic with sufficient charge to drive but no power to critical systems.

“Owners who received the software updates still experienced failures, and brand-new cars continue to fail,” Corbin said. “Many reports indicate people suddenly losing power in intersections and on the highway.”

The problem worsens in cold weather, when complaints spike across owner forums and social media channels. Some drivers experience “charging error” warnings, limp-home mode that restricts speed, or complete loss of electrical features. While DC fast charging can temporarily restore the main battery, the 12-volt system’s failure leaves other functions inoperable or working only briefly.

The technical breakdown

The ICCU serves a role similar to a starter and alternator in gas-powered cars. It manages the 12-volt battery that powers auxiliary systems separate from the large propulsion battery. The 12-volt battery handles everything from door locks and lights to critical safety systems and the vehicle’s computer.

The failure occurs when a MOSFET transistor inside the ICCU breaks down due to overvoltage or thermal stress during the 12-volt battery’s charging cycles. When the transistor fails, it blows a fuse and drains auxiliary power, leaving the vehicle unable to operate normally despite having charge in the main battery.

Affected models include the Hyundai Ioniq 5 and Ioniq 9, Kia EV6, and Genesis GV60, GV70, and G80 from 2022 onward. The three brands share components—Hyundai owns Genesis and holds a significant stake in Kia—which amplified the problem’s reach across their EV lineups.

Recalls haven’t solved it

The automakers have issued at least two recalls and attempted fixes through software updates and hardware replacements. The repair process involves scanning the vehicle’s computer for specific trouble codes like P1A9096. If detected, technicians replace the ICCU, the corresponding fuse, and perform a low-conductivity coolant flush at no cost. Without the trouble code, they apply a software update.

But owners report the problem persists. Some have needed three ICCU replacements on a single vehicle within a few years of purchase. Repair wait times have stretched to two months in some cases due to parts shortages, though Kia told Consumer Reports that necessary parts are now in stock.

Independent repair services have begun offering ICCU module rebuilds by replacing failed internal components for 2022-2025 Genesis models, addressing symptoms like “Check Electric Vehicle System” warnings that dealerships haven’t permanently resolved.

“It’s not unusual for our reliability surveys to uncover so many issues related to a single part, but the fact that we continue to see this year after year is interesting,” said Steven Elek, program leader of auto data analytics at Consumer Reports.

Impact on reliability scores

The ICCU failures have severely damaged these EVs’ reliability rankings. The Hyundai Ioniq 5 outperformed the Tesla Model Y in Consumer Reports’ road tests but received a lower overall score due to ICCU problems, disqualifying it from the publication’s Top Picks list.

In Consumer Reports’ 2026 rankings, the Hyundai Ioniq 9 and Kia EV6 landed among the 12 least reliable EVs due to persistent ICCU-related battery drain and charging failures. The contrast is stark: while these vehicles excel in performance testing, the single component’s failure rate drags down their overall reliability far below industry norms.

Jake Fisher, senior director of Consumer Reports’ Auto Test Center, noted the double-edged sword of parts sharing. “Sharing parts and designs across multiple models and brands can bring great efficiency and cost savings,” he said. “However, that means a single fault can affect several models.”

What owners should do

Current owners should watch for warning signs: “charging error” messages, “check electric vehicle system” alerts, or unexpected power loss. Contact a dealership immediately for ECU scans and recall work. DC fast charging offers temporary relief but doesn’t fix the underlying problem and risks leaving drivers stranded when the 12-volt system fully depletes.

Fisher advised owners to stay in close contact with dealerships about repairs. “If you feel that your local dealership isn’t helpful, try another one nearby, or contact the automaker directly,” he said.

Hyundai told Consumer Reports it’s working with suppliers to ship parts to dealerships quickly and will reimburse owners for some out-of-pocket expenses related to the issue. Kia attributed the problem to “thermal loading and transient high voltage” and said parts are available for repairs.

Prospective buyers face a trade-off: these EVs offer strong driving dynamics and competitive pricing, but carry a 2 to 10 percent chance of experiencing ICCU failure—up to ten times the industry average for charging problems. Those prioritizing reliability may want to consider models with updated ICCUs or competitors like Tesla that haven’t shown similar patterns.

Owners can also file complaints with the National Highway Traffic Safety Administration to push for more comprehensive solutions beyond the current recall efforts. Some are exploring extended warranties that specifically cover electronic components to protect against repeat failures.

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