Hyundai IONIQ Electric 2019–2023 — service campaign
Bulletin 26-01-065H DN · NHTSA communication 11036685 · issued Aug 13, 2026
Service campaign
communication type
Electrical System
component
2019–2023
model years
7
vehicle entries
Official summary
Certain Kona Electric (OS EV) and Ioniq Electric (AE EV) vehicles are eligible for a Battery Management System (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.