# Service campaign Freightliner Air Horn

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 campaign
- NHTSA id: 11022363
- Published by NHTSA: 2025\-09\-03
- Manufacturer's number: Freightliner Air Horn
- Manufacturer's date: 2025\-07\-31
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

The Freightliner chassis horn button on the steering wheel was supposed to control both the city horn and the air horns. The button would work for the city horn but not for the air horn. Freightliner had to change their programming to get the air horns to come on with the button. They both come on at the same time after programming is changed. We are anticipating a formal document from Freightliner to send to customers who are affected by this issue. This informal documentation was sent out to our customers on July 30, 2025.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11022363-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11022363-9999.pdf)

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

## Vehicles listed

- 2024 to 2025 MIDWEST FIRE ALL\-POLY SERIES

JSON: [/v1/bulletins/11022363](/v1/bulletins/11022363)

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