Service bulletin SC-21-121
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11013418 |
| Published by NHTSA | 2025-02-03 |
| Manufacturer's number | SC-21-121 |
| Manufacturer's date | 2022-08-26 |
| Campaign id or software version | SC-21-121 |
| NHTSA component | UNKNOWN OR OTHER |
NHTSA's summary
Transit bus repair, retrofit adds guard to prevent horn from accumulating road debris.
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.
| PROTERRA CATALYST | 2020 |
|---|---|
| PROTERRA ZX5 | 2021 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.