Hyundai Sonata Hybrid 2021 — technical service bulletin
Bulletin 21-01-040H · NHTSA communication 10196472 · issued May 24, 2021
Technical service bulletin
communication type
Power Train
component
2021
model years
1
vehicle entries
Official summary
This bulletin describes the procedure to update the Shift Control Unit (SCU) for Shift-by-Wire vehicles (SBW). The update improves the display in the cluster.
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.