NHTSA Complaint #11718580 — 2025 HYUNDAI IONIQ 5

POWER TRAIN issue reported to NHTSA

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Complaint Details

ODI Number	11718580
Vehicle	2025 HYUNDAI IONIQ 5
Component	POWER TRAIN
Date of Incident	January 27, 2026
Date Filed	February 17, 2026
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	OR

Consumer Description

The 12V system battery failed to keep a charge and the vehicle slowly reduced maximum speed until it fully died causing the car to coast to a stop on a 55MPH highway. At 9,500 miles on the odometer the ICCU has failed. The part is on backorder and my car has been in the shop for three weeks with no estimated completion date. A LOT of IONIQ 5 owners are encountering the ICCU failure.

Related Complaints for the 2025 HYUNDAI IONIQ 5

Other POWER TRAIN Complaints

#11718509 — February 17, 2026 — Main battery failure, can not charge, can not drive car. Warning light(s) on dashboard. High voltage battery needs ...

#11717905 — February 13, 2026 — ICCU needs to be replaced.

#11717915 — February 13, 2026 — Vehicle experienced a dashboard alert, "Check electric vehicle system." The car produced an OBD code: P1AD3(00). Upon...

#11716579 — February 8, 2026 — What failed: On February, 6, 2026, I experienced a complete failure of my Ioniq 5's electrical system due to the ICCU...

#11716380 — February 7, 2026 — 2:27 pm on 02/06/2026. Pop heard from the trunk area, then displayed "Stop vehicle and check power supply," the car l...

Recent Complaints for the 2025 HYUNDAI IONIQ 5

#11719702 — ELECTRICAL SYSTEM — February 22, 2026 — The ICCU (integrated charging control unit) failed on the vehicle, which resulted in the vehicle not being able to ch...

#11719702 — FUEL/PROPULSION SYSTEM — February 22, 2026 — The ICCU (integrated charging control unit) failed on the vehicle, which resulted in the vehicle not being able to ch...

#11719627 — ELECTRICAL SYSTEM — February 21, 2026 — The ICCU component failed on me at 4,356 miles. Heard a pop with the car and then the dash started displaying electri...

#11719627 — UNKNOWN OR OTHER — February 21, 2026 — The ICCU component failed on me at 4,356 miles. Heard a pop with the car and then the dash started displaying electri...

#11719025 — ELECTRICAL SYSTEM — February 19, 2026 — ''Stop vehicle and check power supply'' At this point I heard a pop sound and the car died. The dealer said this is a...