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Service bulletin SC-21-130

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 id11013410
Published by NHTSA2025-02-03
Manufacturer's numberSC-21-130
Manufacturer's date2021-12-07
Campaign id or software versionSC-21-130
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

Transit bus repair to replace mudflaps behind the rear wheels. Larger mudflaps will be installed to minimize road grime and debris from entering the rear vehicle cage, thereby offering better protection for the components in the rear of the bus.

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 CATALYST2018 to 2020
PROTERRA ZX52020

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