Jeep Compass 2018–2021 — technical service bulletin
Bulletin S2103000001 · NHTSA communication 10219990 · issued Aug 31, 2021
Technical service bulletin
communication type
Back Over Prevention
component
2018–2021
model years
4
vehicle entries
Official summary
Ratcheting Or Growling Noise From Rear Differential Module (RDM).
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.