Jeep Compass 2018 — technical service bulletin
Bulletin 21-016-21 · NHTSA communication 10194071 · issued Apr 27, 2021
Technical service bulletin
communication type
Electrical System
component
2018
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Enhancements to this software release:Shift Quality improvements on coast down and all upshifts.
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.