Hyundai Elantra 2016–2018 — technical service bulletin
Bulletin 21-AT-013H · NHTSA communication 10201468 · issued Aug 19, 2021
Technical service bulletin
communication type
Power Train
component
2016–2018
model years
6
vehicle entries
Official summary
Certain vehicles (listed below) equipped with 7-speed Dual Clutch Transmission (DCT) may exhibit abnormal vibration at low speeds. This bulletin outlines the procedures for diagnosing and replacing the Double Clutch, including a Transmission Control Unit (TCU) software update.
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.