Freightliner 122SD 2017–2020 — technical service bulletin
Bulletin CALFTL31-003REV · NHTSA communication 10189341 · issued Mar 1, 2021
Technical service bulletin
communication type
Trailer Hitches
component
2017–2020
model years
8
vehicle entries
Official summary
Revised Customer Advisory Letter for Cascadia, New Cascadia, and 122SD Vehicles with Cracked Fifth Wheel Angles. Additional photos have been added.
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.