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Service bulletin SB-18-28

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 id11014243
Published by NHTSA2025-02-12
Manufacturer's numberSB-18-28
Manufacturer's date2021-10-05
Campaign id or software versionSB-18-28
NHTSA componentSERVICE BRAKES

NHTSA's summary

Transit bus repair to upgrade the ABS controller to communicate with clever ITS ABS monitoring.

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

Brakes

Vehicles listed
PROTERRA CATALYST2018

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