Freightliner Cascadia 2017–2021 — technical service bulletin
Bulletin SB09-038 · NHTSA communication 10181322 · issued Oct 16, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2021
model years
5
vehicle entries
Official summary
Freightliner Service Bulletin for Air Cleaner Support Bracket Bolt Replacement. On New Cascadia vehicles, the air filter housing rear mounting bracket bolts may be found to be loose or missing. If allowed to continue, this can lead to complete bolt failure which will allow the filter housing to rest on and possibly wear through the valve cover.
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.