Hyundai IONIQ Electric 2019–2023 — service campaign
Bulletin 9C5 OL · NHTSA communication 11037293 · issued Sep 9, 2026
Service campaign
communication type
Fuel/propulsion System
component
2019–2023
model years
7
vehicle entries
Official summary
Hyundai has determined that certain Kona Electric and Ioniq Electric vehicles are eligible for a BMS software update. This update to the BMS software improves the system’s diagnostic capability.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.