Kia Niro 2020–2022 — technical service bulletin
Bulletin PI2603_TSB · NHTSA communication 11033933 · issued Jun 15, 2026
Technical service bulletin
communication type
Electrical System
component
2020–2022
model years
3
vehicle entries
Official summary
TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: BMS BATTERY DIAGNOSTIC LOGIC IMPROVEMENT (PI2603) - This bulletin provides information regarding a Battery Management System (BMS) software update for certain 2020–2022MY Niro (DE EV) vehicles produced from June 2, 2020, through November 8, 2021. Kia has developed improved battery health monitoring software to enhance the BMS diagnostic performance of the high-voltage battery (HVB) cells produced by a specific supplier in the subject vehicles. This improved software will enhance the long-term issue detection capabilities of the high-vol
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.