# Service bulletin SC\-21\-159

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: 11013374
- Published by NHTSA: 2025\-02\-03
- Manufacturer's number: SC\-21\-159
- Manufacturer's date: 2022\-01\-22
- Campaign id or software version: SC\-21\-159
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

Transit bus bulletin to install snorkel to air compressor to prevent water and road grim from entering the intake.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-11013374-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-11013374-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- 2019 to 2021 PROTERRA CATALYST
- 2021 to 2022 PROTERRA ZX5

JSON: [/v1/bulletins/11013374](/v1/bulletins/11013374)

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