Hyundai IONIQ 5 2025–2026 — warranty extension
Bulletin 26-01-046H DCS · NHTSA communication 11033697 · issued May 16, 2026
Warranty extension
communication type
Electrical System
component
2025–2026
model years
2
vehicle entries
Official summary
Certain IONIQ 5 (NEA EV) vehicles may have 12V battery drainage due to the scheduled climate feature. Technical Service Bulletin (TSB) 26-01-046H provides instructions to perform a software update for the Vehicle Control Unit (VCU) to improve the logic of the scheduled climate reducing battery drainage.
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.