Service bulletin SC-21-087
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 | 11013503 |
| Published by NHTSA | 2025-02-04 |
| Manufacturer's number | SC-21-087 |
| Manufacturer's date | 2021-06-23 |
| Campaign id or software version | SC-21-087 |
| NHTSA component | ELECTRICAL SYSTEM |
NHTSA's summary
Transit bus repair for horn relays, improved horn relay installed during retrofit.
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
Electrical system
| PROTERRA ZX5 | 2019 to 2022 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.