2012–2013 Thomas Built Buses Saf-T-Liner C2, 2011 Thomas Built Saf-T-Liner C2 Recall: Software controlling the affected transmissions may improperly raise the…
NHTSA campaign 13V633000 · Power Train · filed Dec 16, 2013 · verified Jul 30, 2026
The defect
Daimler Trucks North America (DTNA) is recalling certain model year 2011-2013 Thomas Built Saf-T-Liner C2 school buses manufactured December 3, 2009, through February 8, 2012, and equipped with Eaton hybrid automated transmissions. The software controlling the affected transmissions may improperly raise the vehicle's engine speed during downshifts without the driver's input.
The risk
The increase in engine speed may result in unintended acceleration, 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 hybrid transmission software, free of charge. The recall began on February 5, 2014. Owners may contact DTNA at 1-503-745-6910. DTNA's recall number is FL-657.
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 C2 | 2012, 2013 |
| Thomas Built | Saf-T-Liner C2 | 2011 |
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All Thomas Built Buses Saf-T-Liner C2 recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 13V633000 (manufacturer number FL-657). Data last verified Jul 30, 2026.