2020–2023 Thomas Built Buses Saf-T-Liner Efx Recall: Passenger seat mounting bolts may break due to improperly placed mounting…
NHTSA campaign 22V153000 · Seats · filed Mar 11, 2022 · verified Jul 30, 2026
The defect
Daimler Trucks North America, LLC (DTNA) is recalling certain 2020-2023 Thomas Built Buses Saf-T-Liner EFX School Buses. The passenger seat mounting bolts may break due to improperly placed mounting that allows contact with the chassis cross member bolts. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 210, "Seat Belt Assembly Anchorage" and 222, "School Bus Passenger Seating and Crash Protection."
The risk
A seat with broken mounting bolts may not properly restrain an occupant in a crash, increasing their risk of injury.
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 add a spacer to provide proper clearance between the passenger seat mounting and chassis cross member bolts, free of charge. Owner notification letters were mailed June 2, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-921.
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 Efx | 2020, 2021, 2022, 2023 |
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All Thomas Built Buses Saf-T-Liner Efx recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 22V153000 (manufacturer number FL-921). Data last verified Jul 30, 2026.