Hyundai and Kia EV Charging System Failures Under California's Lemon Law

Is an ICCU failure a lemon law defect in California?

An ICCU failure can absolutely be a lemon law defect, because losing drive power while driving substantially impairs both the use and the safety of the vehicle. The Song-Beverly Consumer Warranty Act, through Civil Code section 1793.2(d)(2), requires the manufacturer to repurchase or replace a vehicle it cannot conform to warranty after a reasonable number of repair attempts. A component that strands the car, kills the 12-volt system, or blocks charging is a textbook "nonconformity."

This page covers the EV charging side of the story. Hyundai and Kia combustion vehicles have their own well-known history, covered in our companion guide to Hyundai and Kia engine defects, and both are collected on the Hyundai and Kia overview page.

What is the ICCU problem in the Ioniq 5, Ioniq 6, and EV6?

The Integrated Charging Control Unit charges the 12-volt battery and manages onboard charging, and it has been the subject of NHTSA safety recalls because internal component failures can blow a fuse and cut off charging of the 12-volt system. Hyundai recalled Ioniq 5, Ioniq 6, and Genesis EV models beginning in March 2024 and again, in an expanded population of roughly 145,000 vehicles, in late 2024; Kia recalled 2022 through 2024 EV6 vehicles for the same component in 2024. In the recalled condition, the vehicle can enter a fail-safe mode and gradually lose drive power, in some descriptions within roughly 20 to 45 minutes of the warning.

The remedies have centered on software updates plus inspection, with fuse or ICCU replacement where needed. Public reporting and owner forums also describe vehicles that experienced ICCU failures again after receiving a recall remedy. None of this means every Ioniq or EV6 will fail. It means the defect pattern is publicly documented, which strengthens the credibility of an individual claim.

My car already got the ICCU recall fix. Can it still be a lemon?

Yes. A recall repair is a repair attempt, not a waiver of your rights, and a problem that returns after the recall remedy is one of the strongest fact patterns in lemon law. The statute asks a simple question: has the manufacturer conformed the vehicle to its warranty within a reasonable number of attempts? If your car went in for the recall, then came back with another 12-volt collapse, another tow, or another charging failure, each event counts. Keep the recall work order with the rest of your repair records, and make sure your specific symptoms, not just the recall campaign language, appear on it.

Do failures at home chargers or DC fast chargers count?

Yes, repeated charging failures can qualify as a nonconformity even without a dramatic roadside power loss, because a car you cannot reliably charge is a car whose use is substantially impaired. That includes Level 2 charging faults at home, DC fast-charging sessions that repeatedly abort or derate without explanation, and charge ports or onboard chargers that fail intermittently. The practical challenge is attribution: the dealer may blame your charger, the charging network, or the weather. Document failures across different chargers and networks, photograph the error screens, and get every complaint written on a repair order. A pattern across multiple chargers points at the car.

How does the Tanner presumption apply to a power-loss defect?

The Tanner presumption can apply quickly, because a defect that causes progressive loss of drive power in traffic is plausibly one "likely to cause death or serious bodily injury," and for that category two repair attempts within 18 months or 18,000 miles can be enough. The presumption in Civil Code section 1793.22 also arises after four or more attempts for the same nonconformity, or a cumulative total of more than 30 calendar days out of service. The 30-day prong matters here: ICCU parts backlogs have left some owners waiting weeks, and days waiting for parts while the car sits at the dealer count toward the total. The presumption is a shortcut, not a requirement; a claim can succeed without meeting any of the three thresholds.

What is a buyback worth on an Ioniq 5 or EV6?

A buyback returns your down payment, monthly payments, and loan or lease payoff, plus official fees and incidentals like towing and rental cars, minus a mileage offset under Civil Code section 1793.2(d)(2)(C): miles at the first repair attempt divided by 120,000, times the price paid. Because ICCU problems often show up early, the offset in these cases can be small. Run your numbers in our buyback calculator. If the manufacturer willfully dragged its feet, Civil Code section 1794(c) permits a civil penalty of up to two times your damages, and section 1794(d) shifts a prevailing consumer's attorney fees to the manufacturer.

Do the new AB 1755 rules apply to Hyundai and Kia?

Yes. Hyundai and Kia are separate manufacturers for this purpose, and as of July 6, 2026 the DCA's published list shows each of them elected in: Hyundai Motor America on April 28, 2025, Kia America on May 1, 2025, and Genesis Motor America on April 28, 2025. Under the 2025 changes made by AB 1755 and SB 26, that means the new shorter deadlines, pre-suit notice rule, and mandatory mediation apply to all three brands. Manufacturers can elect in at any time, so check the current status on the DCA's opt-in list when your claim starts. Our AB 1755 hub explains the two tracks, and the main lemon law guide covers the fundamentals that apply either way.