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Service bulletin SC-21-166

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11013372
Published by NHTSA2025-02-02
Manufacturer's numberSC-21-166
Manufacturer's date2022-04-25
Campaign id or software versionSC-21-166
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

Transit bus repair for exterior compartments gas strut brackets. Document provides instruction to improve the securement of the fixed brackets.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Body and frame

Vehicles listed
PROTERRA CATALYST2019 to 2020
PROTERRA ZX52019 to 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.