2009–2015 Thomas Built Buses Saf-T-Liner HDX Recall: Condensation in the intake manifold may freeze during cold weather…
NHTSA campaign 14V079000 · Engine and Engine Cooling · filed Feb 21, 2014 · verified Jul 30, 2026
The defect
Daimler Trucks North America LLC (Daimler) is recalling certain model year 2009-2015 Thomas Built Saf-T-Liner HDX school buses manufactured February 25, 2008, through February 11, 2014, equipped with Cummins Westport Model ISL G engines. Condensation in the intake manifold may freeze during cold weather conditions and interfere with the proper operation of the intake manifold pressure sensor.
The risk
The sensor malfunction could induce elevated exhaust temperatures or flames from the exhaust pipe, increasing the risk of a vehicle fire or burn injury to a person near the exhaust pipe.
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
Cummins and Cummins Westport will notify owners, and authorized Cummins service facilities will upload a new ECM calibration, free of charge. The recall began on April 12, 2014. Customers may contact Daimler at 1-800-385-4357 or Cummins Inc. at 1-800-343-7357. Daimler's number for this recall is FL-660.
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 HDX | 2009, 2010, 2011, 2012, 2013, 2014, 2015 |
Related recalls
More Thomas Built Buses Saf-T-Liner HDX recalls
- 2023–2026 Thomas Built Buses Saf-T-Liner Efx and 1 other model — Heater hose clamps may not have been tightened properly…
- 2023–2025 Thomas Built Buses Saf-T-Liner Efx and 1 other model — Heater hose clamps may not have been tightened properly…
- 2025–2027 Thomas Built Buses Minotour DRW and 4 other models — Wheel chair restraint retractor may not lock, preventing…
- 2025–2026 Thomas Built Buses Saf-T-Liner C2 and 4 other models — Tie rod castle nut and cotter pin may not be installed…
- 2019–2022 Thomas Built Buses Minotour DRW and 5 other models — Emergency Exit Label lettering is too small and may be…
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 HDX recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 14V079000 (manufacturer number FL-660). Data last verified Jul 30, 2026.