Hyundai Ioniq 5 ICCU Recall: Check This Before Buying

Before you buy a used 2022-2024 Hyundai Ioniq 5, confirm by VIN that recall 24V-868 (Hyundai campaign 272) was completed, not just the earlier 24V-204 fix. The recall covers the Integrated Charging Control Unit, or ICCU, which can fail and stop charging the 12-volt battery, and that can end in a total loss of drive power. The same recall covers 2023-2025 Ioniq 6, Genesis GV60 and GV70 Electrified, and 2023-2024 G80 Electrified, while the Kia EV6 has its own version, 24V-867.

The ICCU is the box that handles charging, including keeping the small 12-volt battery topped up from the big pack. InsideEVs described it in March 2025 as bundling the charging controllers, converters and the vehicle-to-load hardware into one unit, sitting on top of the battery pack under the rear seat. When the low-voltage side fails, the 12-volt battery slowly drains while you drive, the car throws warnings and limits power, and eventually it stops. That is a tow, and on a highway it is a scary one.

What the recall actually covers

NHTSA's acknowledgment letter dated November 21, 2024 lists 145,235 Hyundai and Genesis vehicles. Hyundai's recall numbers are 272 for Hyundai and 025G for Genesis. The remedy: dealers inspect and replace the ICCU and its fuse as necessary, and update the ICCU software, free. The letter also says this recall expands and replaces 24V-204, and that vehicles already repaired under 24V-204 need the new remedy done.

That last line is the trap for used buyers. A seller can honestly say "the ICCU recall was done" and be talking about the 2024 fix that Hyundai later replaced. Ask which campaign number is on the repair order. If it says 257 or 24V-204 only, the car still needs 272.

Kia's EV6 recall, 24V-867, covers 2022-2024 models. Kia's owner letter says the ICCU can be damaged by transient high voltage and thermal cycling, that it supersedes the earlier 24V-200 recall (Kia SC302), and that owners who had SC302 done still need the new one. InsideEVs put the EV6 count at 62,872.

Kia first mailed EV6 owners on December 13, 2024, then sent a renotification dated April 30, 2025 to registered owners whose cars, by Kia's records, still had not had the recall done. So on an EV6, ask the seller whether they got either letter. The same letter says owners who paid for this repair before the notice may be able to get reimbursed by submitting receipts to Kia, which is worth knowing if the seller swapped an ICCU out of pocket.

How bad is the failure, really

Hyundai's own chronology, filed with NHTSA, is the best data we have. In testing, a car with a failed low-voltage converter kept full power for a while and then stepped down through stages of warnings and reduced power. One Hyundai test showed full power for about 22 minutes and up to 45 minutes of total driving. A joint test with NHTSA's Vehicle Research and Test Center under harsh conditions, with accessories on and a hilly test track, showed about 10 minutes of full power and roughly 21 to 26 minutes before a complete stall. Hyundai confirmed 57 unique US incidents between March 25 and November 5, 2024 and reported no crashes or injuries tied to the condition.

The chronology also admits why the recall was redone: Hyundai started getting reports of ICCU failures on cars that had already had the first remedy. InsideEVs collected owner complaints of second failures after repair and long waits for parts, including one owner who said they waited five months. Honestly, that is the real cost for a used buyer. The repair is free; the weeks without a car are not.

What the fix involves

According to the service procedure InsideEVs described, the technician first scans for trouble code P1A9096. If it is not stored, the car gets the software update. If it is stored, the ICCU and fuse are replaced, the low-conductivity coolant is flushed, and the software is updated. MotorTrend reported, as InsideEVs relayed, that the new software soft-starts the 12-volt charging and changes fan and pump behavior to keep the unit cooler. So a car that got "only software" may be fine. It just means no fault was stored on the day it was checked.

Checks to run on a used Ioniq 5 or EV6

• Run the VIN on NHTSA's recall search and with Hyundai or Kia. Our Hyundai recall check and Kia recall check show how.
• Get the dealer repair order for campaign 272 (Hyundai) or the 24V-867 campaign (Kia) and see whether the ICCU was replaced or only reflashed.
• On the test drive, watch for a "Check electric vehicle system" message, a charging system light, a power-limited or turtle warning, or a "Stop vehicle and check power supply" alert, which are the warnings Kia lists in its letter.
• Test both AC charging and, if you can, a DC fast charge session before you buy, since the ICCU sits in that path.

Our used Ioniq 5 guide and used EV6 guide cover battery health, tires and the rest. For other high-voltage campaigns, see used EV battery recalls.

Where a history report fits

A history report will not tell you whether the ICCU is about to fail. It can show repeated dealer visits, a tow-in, title brands and accident damage, and EVs with flood or crash history are their own headache. CARFAX's retail price for one report has hovered around $39.99 to $44.99, with Edmunds listing $44.99 in June 2026. We are a licensed CARFAX and AutoCheck reseller, not affiliated with either company or with Experian; our guest price has been about $5.50, about $4.50 for members and about $6.75 for both reports together. Prices do change, so confirm at checkout.

Sources

• NHTSA acknowledgment, recall 24V-868 (Hyundai 272 / Genesis 025G), November 21, 2024
• Hyundai chronology of events for 24V-868 (via NHTSA)
• Kia owner notification and renotification, recall 24V-867, EV6 (via NHTSA)
• InsideEVs: Hyundai's ICCU problem, here's what we know (March 2025)
• Edmunds: CARFAX and AutoCheck pricing, June 2026