Kia EV9 2026 — technical service bulletin
Bulletin TSB_ELE405 · NHTSA communication 11025763 · issued Nov 7, 2025
Technical service bulletin
communication type
Electrical System
component
2026
model years
1
vehicle entries
Official summary
TECHNICAL SERVICE BULLETIN: SERVICE ACTION: VCU OPERATION LOGIC IMPROVEMENT (SA634) - This bulletin provides information to upgrade the Vehicle Control Unit (VCU) system software on certain 2026MY EV9 (MV1a) vehicles produced from January 2, 2025 through November 3, 2025, where the Integrated Electronic Brake (IEB) Controller Area Network (CAN) times out on startup, resulting in a DTC warning light and failure to restart charging when the connector remains connected after charging is completed. This condition is not associated with any braking or drivability symptoms.
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.