2023–2025 Thomas Built Buses Saf-T-Liner C2, 2024–2025 Thomas Built Buses Saf-T-Liner C2 Jouley Recall: Audible emergency warning alarm sounds may not activate when the emergency…
NHTSA campaign 24V478000 · Structure · filed Jun 26, 2024 · verified Jul 30, 2026
The defect
Daimler Trucks North America, LLC (DTNA) is recalling certain 2023-2025 Thomas Built Buses Saf-T-Liner C2 and 2024-2025 Thomas Built Buses Saf-T-Liner C2 Jouley school buses. The audible emergency warning alarm sounds may not activate when the emergency hatch or window is open. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 217, "Bus Emergency Exits and Window Retention and Release."
The risk
An inaudible alarm that fails to warn the driver of an open emergency exit can increase the risk of injury in a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Dealers will update the emergency sound software, free of charge. Owner notification letters were mailed August 22, 2024. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is F1004.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Thomas Built Buses | Saf-T-Liner C2 | 2023, 2024, 2025 |
| Thomas Built Buses | Saf-T-Liner C2 Jouley | 2024, 2025 |
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All Thomas Built Buses Saf-T-Liner C2 recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 24V478000 (manufacturer number F1004). Data last verified Jul 30, 2026.