NHTSA Recall 24V204: Hyundai & Genesis ICCU Loss of Drive Power

What the recall covers

Recall 24V204 addresses the Integrated Charging Control Unit, the component that manages AC and DC charging and keeps the 12-volt battery topped up. A transistor inside the ICCU can fail under thermal load and transient high voltage, blowing a fuse and stopping the 12-volt battery from charging. Because the 12-volt system powers the vehicle's controls, the battery eventually drains and the car loses drive power — typically after a "Power Limited" warning, and in many owner reports while driving at speed.

The remedy

Hyundai and Genesis dealers will update the ICCU software and inspect the unit, replacing the ICCU fuse or the entire ICCU where necessary, free of charge. Hyundai's internal campaign number for this recall is 257/021G. Note that this was not the last word on the ICCU: Hyundai has issued further campaigns in the same family adding VINs as failure data accumulated, so a vehicle repaired under 24V204 may still be covered by a later campaign.

What owners should do now

• Treat a "Power Limited" or reduced-power warning as urgent — pull over somewhere safe rather than trying to reach your destination.
• Check your 17-digit VIN at nhtsa.gov/recalls, and check it again periodically — later ICCU campaigns have added VINs that were not in the original population.
• Schedule the free software update and ICCU inspection at an authorized dealer.
• Keep every repair order, and make sure the specific symptom you experienced is written on it — not just the recall number.
• Write down each date the vehicle was in the shop or undrivable, including tow dates and any period spent waiting on a backordered ICCU.
• If the failure returns after the recall repair, do not assume it is fixed the second time — document it and get advice.

How to check your VIN

Confirm whether a specific vehicle is included by entering the 17-digit VIN at nhtsa.gov/recalls, or by calling the NHTSA Vehicle Safety Hotline at 888-327-4236. Inclusion depends on the VIN, not just the model and year, and because Hyundai has issued more than one ICCU campaign it is worth rechecking a VIN that came back clear previously.

Hyundai and Genesis customer service: 855-371-9460 (Hyundai's number for this recall is 257/021G) — recall updates at hyundaiusa.com and genesis.com.

When this recall can become a California lemon law claim

A recall is not automatically a lemon — it is the manufacturer acknowledging a defect and offering a free fix. Your Hyundai may qualify under California's Lemon Law if the recall repair is significantly delayed, doesn't resolve the problem, or your vehicle has other unrepaired warranty defects. In those cases you may be entitled to a buyback, replacement, or cash settlement, with the manufacturer paying your attorney fees. For the full breakdown, see the guides below.