2023 Hyundai IONIQ 5 fuel/propulsion system problems
67 owner complaints filed with NHTSA name the fuel/propulsion system on the 2023 Hyundai IONIQ 5 — 17% of all complaints for this model year.
What owners report
“We are reporting a suspected thermal runaway incident involving our recently purchased used 2023 Hyundai Ioniq 5 and have significant concerns regarding the vehicle's safety. **Vehicle Information** * Purchased XXX, 36,662 miles * Clean inspection and no accidents per Carfax **Incident Timeline –…”
filed Aug 5, 2026
“1. What component failed, and is it available for inspection? The Integrated Charging Control Unit (ICCU) failed. The vehicle is currently at the dealer's service center, so the failed component is available for inspection upon request. 2. How was your safety or others' safety put at risk? After…”
filed Jun 22, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Certain 2022 – 2024 model year IONIQ 5, 2024 model year IONIQ 5 Robotaxi, and 2023 – 2025 model year IONIQ 6 vehicles may require a replacement of the Integrated Charging Control Unit (ICCU) and ICCU Fuse. At Hyundai…
Z14 OL · Warranty Program/Extension · issued Jun 25, 2026
Fuel/propulsion System problems in other IONIQ 5 years
| Year | Reports | Share |
|---|---|---|
| 2026 IONIQ 5 | 1 | 4% |
| 2025 IONIQ 5 | 66 | 22% |
| 2024 IONIQ 5 | 51 | 23% |
| 2022 IONIQ 5 | 89 | 22% |
Other reported problem areas on the 2023 Hyundai IONIQ 5
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.