Hyundai IONIQ Electric 2017–2021 — technical service bulletin
Bulletin 21-EE-001H · NHTSA communication 10190031 · issued Mar 16, 2021
Technical service bulletin
communication type
Equipment Adaptive/mobility
component
2017–2021
model years
7
vehicle entries
Official summary
This Service Information bulletin provides the instructions on how to adjust the maximum EV battery charging threshold in the radio head unit.
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.