Hyundai Sonata 2015–2017 — technical service bulletin
Bulletin Campaign TWW Dea · NHTSA communication 10177132 · issued Jun 19, 2020
Technical service bulletin
communication type
Power Train
component
2015–2017
model years
3
vehicle entries
Official summary
This service campaign provides instructions to update both the ECM (Engine Control Module) and the TCM (Transmission Control Module) to improve the shift quality of the DCT (Dual Clutch Transmission) for these vehicles.
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.