Hyundai Sonata Hybrid 2011–2017 — technical service bulletin
Bulletin 5NP-S6S9Z-12 · NHTSA communication 10151896 · issued Nov 12, 2018
Technical service bulletin
communication type
Electrical System
component
2011–2017
model years
8
vehicle entries
Official summary
This bulletin provides information related to a BMS (Battery Management System) ECU software update that must be performed after replacing a high voltage Lithium Battery in a Sonata HEV (YF HEV) or Tucson Fuel Cell Electric Vehicle (LM FCEV).
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.