Kia Niro EV 2020–2021 — technical service bulletin
Bulletin PI2603Y_TSB · NHTSA communication 11035089 · issued Jul 8, 2026
Technical service bulletin
communication type
Fuel/propulsion System
component
2020–2021
model years
2
vehicle entries
Official summary
TECHNICAL SERVICE BULLETIN: BSA REPLACEMENT (PI2603Y) - This bulletin provides information related to the Technical Service Bulletin previously published under PI2603, titled “BMS Battery Diagnostic Logic Improvement.” If one or more of the Diagnostic Trouble Codes (DTCs) listed in the bulletin are present or stored after the Battery Management System (BMS) software upgrade has been performed per PI2603, follow the procedure outlined in this publication to replace the Battery System Assembly (BSA) on the applicable vehicle.
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.