# Service bulletin TSIB 25\-03

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: 11018099
- Published by NHTSA: 2025\-05\-07
- Manufacturer's number: TSIB 25\-03
- Manufacturer's date: 2025\-04\-16
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

This TSIB identifies the special procedures necessary when the bus is not in regular use and the air compressor is operated at a low duty cycle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11018099-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11018099-9999.pdf)

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

## Components

Brakes

## Vehicles listed

- 2023 to 2025 NEW FLYER XCELSIOR

## Other bulletins for the same vehicles and component

- [TSIB 26\-08](/bulletins/11036148.md), 2026-08-12, Service bulletin: SERVICE BRAKES. This bulletin introduces new improved banjo bolts for buses equipped with a Haldex tandem air dryers. The updated banjo bolts feature enhanced corrosion resistance and are designed to replace the current banjo bolts to help minimize corrosion\-related issues that may affect air dryer performance and reliability.

JSON: [/v1/bulletins/11018099](/v1/bulletins/11018099)

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