Kia Optima 2018 — technical service bulletin
Bulletin TSBENG177B_R1CLO · NHTSA communication 10133181 · issued Mar 21, 2018
Technical service bulletin
communication type
Power Train
component
2018
model years
2
vehicle entries
Official summary
Tsb - service action: 2.4l shift quality & wake-up logic improvement (sa316b) - this bulletin has been closed and superceded by tsb-eng177c r3.
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.