Hyundai IONIQ Hybrid 2017–2018 — technical service bulletin
Bulletin 5NP-X2L9K-10 · NHTSA communication 10145507 · issued Sep 6, 2018
Technical service bulletin
communication type
Electrical System
component
2017–2018
model years
2
vehicle entries
Official summary
This bulletin provides information related to a BMS (Battery Management System) ECU software update to revise the 12V LiOn battery system management and diagnostics.
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.