2014–2015 Thomas Built Buses Saf-T-Liner Efx Recall: In the affected vehicles, due to an incorrect calibration, the speedometer…
NHTSA campaign 13V639000 · Electrical System · filed Dec 20, 2013 · verified Jul 30, 2026
The defect
Daimler Trucks North America (DTNA) is recalling certain model year 2014-2015 Thomas Built Saf-T-Liner EFX school buses manufactured September 30, 2013, through November 15, 2013. In the affected vehicles, due to an incorrect calibration, the speedometer may display a speed lower than the vehicle is actually traveling.
The risk
With the incorrect calibration, the driver may unknowingly exceed the posted speed limit, increasing the risk of 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
DTNA will notify owners, and dealers will update the instrument cluster software to correct the calibration, free of charge. Owners may contact DTNA at 1-800-547-0712. DTNA's number for this recall is FL-658.
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.safercar.gov.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Thomas Built Buses | Saf-T-Liner Efx | 2014, 2015 |
Related recalls
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Other campaigns involving Thomas Built Buses vehicles
- 2026–2027 Thomas Built Buses Saf-T-Liner EFX2 and 1 other model — Entrance door may fail to open or close when the switch is…
- 2026–2027 Thomas Built Buses Saf-T-Liner HDX2 — Entrance door may fail to open or close when the switch is…
- 2027 Thomas Built Buses Saf-T-Liner HDX2 — Front and mid-body interior joints may have been…
All Thomas Built Buses Saf-T-Liner Efx recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 13V639000 (manufacturer number FL-658). Data last verified Jul 30, 2026.