2026 Thomas Built Buses Saf-T-Liner Hdx problems, complaints & recalls
Safety recalls (3)
Engine And Engine Cooling:cooling System:hoses/Lines/Piping/Fittings 2026-02-13 · campaign 26V086000 · 2,843 vehicles
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain Thomas Built Buses 2023-2026 Saf-T-Liner EFX and Saf-T-Liner HDX school buses. The heater hose clamps may not have been tightened properly, causing the hose to disconnect and leak heating coolant inside the passenger compartment.
Risk: Contact with hot heating coolant may burn occupants, increasing the risk of injury.
Fix: 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.
Engine And Engine Cooling:cooling System:hoses/Lines/Piping/Fittings 2026-02-13 · campaign 26V087000 · 52 vehicles
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.
Risk: Contact with hot heating coolant may burn occupants, increasing the risk of injury.
Fix: 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.
Equipment Adaptive/Mobility:wheelchair Restraints/Securement:latch/Anchor: 2025-12-09 · campaign 25V849000 · 600 vehicles
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2025 Thomas Built Buses Saf-T-Liner EFX, 2025-2027 Thomas Built Buses Minotour DRW, 2026 Thomas Built Buses Saf-T-Liner C2 Jouley, Thomas Built Buses HDX, and 2026-2027 Thomas Built Buses Saf-T-Liner C2 school buses equipped with certain QRT-Deluxe and QRT-Max wheelchair restraints. The wheel chair restraint retractor may not lock, preventing the wheelchair from being properly secured.
Risk: An unsecured wheelchair can move during transit, increasing the risk of injury.
Fix: Dealers will inspect and replace the retractors, as necessary, free of charge. Owner notification letters were mailed February 5, 2026. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is F1028.
Service bulletins (2)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-04-23 · SS 306-TBB · Other
service solution for hdx def header service replacement additional parts
Electrical System 2026-03-20 · SS 308-TBB · Other
service solution for timer relay tbb 202400 replacement
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.