The defect
Daimler Trucks North America, LLC (DTNA) is recalling certain Thomas Built Buses 2023-2025 Saf-T-Liner EFX and 2023-2026 Saf-T-Liner HDX vehicles. The heater hose clamps may not have been tightened properly, causing the hose to disconnect and leak heating coolant inside the passenger compartment.
The risk
Contact with hot heating coolant may burn occupants, increasing the risk of injury.
The remedy
Dealers will inspect and replace the heater hose clamps, as necessary, free of charge. Owner notification letters were mailed April 10, 2026. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is F1030.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Thomas Built Buses SAF-T-Liner EFX | 2023, 2024, 2025 |
| Thomas Built Buses SAF-T-Liner HDX | 2023, 2024, 2025, 2026 |
Components: ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Thomas Built Buses SAF-T-Liner EFX | 2023 | 0 | 6 |
| Thomas Built Buses SAF-T-Liner EFX | 2024 | 0 | 2 |
| Thomas Built Buses SAF-T-Liner EFX | 2025 | 0 | 5 |
| Thomas Built Buses SAF-T-Liner HDX | 2023 | 0 | 8 |
| Thomas Built Buses SAF-T-Liner HDX | 2024 | 0 | 2 |
| Thomas Built Buses SAF-T-Liner HDX | 2025 | 0 | 3 |
| Thomas Built Buses SAF-T-Liner HDX | 2026 | 0 | 3 |
Other engine and engine cooling recalls in 2026
17 of the 666 recall campaigns reported to NHTSA in 2026 concerned the engine and engine cooling; Daimler Trucks North America, LLC filed 166 campaigns in all.
| 26V659000 7 Oct 2026 | Toyota Motor Engineering & Manufacturing |
| 26V573000 3 Sept 2026 | Nova Bus (US) Inc. |
| 26V548000 25 Aug 2026 | Ford Motor Company |
| 26V532000 13 Aug 2026 | Ford Motor Company |
| 26V343000 27 May 2026 | Ford Motor Company |
| 26V320000 20 May 2026 | Toyota Motor Engineering & Manufacturing |
| 26V287000 6 May 2026 | Corp. Micro Bird, Inc. |
| 26V286000 6 May 2026 | Corp. Micro Bird, Inc. |
NHTSA recalls (public domain) · all recalls of 2026