{"nhtsa_id":11022363,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-09-03","date":"2025-07-31","document_id":"Freightliner Air Horn","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11022363-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11022363-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11022363","components":[],"codes":[],"topics":[],"vehicles":[{"make":"MIDWEST FIRE","model":"ALL-POLY SERIES","year_from":2024,"year_to":2025,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"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.","attribution":[]}