2024 Thomas Built Buses Saf-T-Liner Efx problems, complaints & recalls
Safety recalls (2)
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.
Service bulletins (16)
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.
Unknown Or Other 2026-07-06 · TSB-54-029-FTL · Service Bulletin/Repair Instructions
technical service bulletin for electrical wiring modifications for type dfootwell heater
Visibility/Wiper 2026-04-24 · SS 305-TBB · Other
service solution for efx ac upper bracket tbb 130987 replaced with tbb 248310
Electrical System 2026-03-20 · SS 308-TBB · Other
service solution for timer relay tbb 202400 replacement
Unknown Or Other 2026-01-26 · SS 582773-TBB · Other
service solution for efx shock mount frame rail crack repair
Unknown Or Other 2025-09-09 · MYCOM_09092025-1 · Other
my communications for dtna announces extended coverage policy updates
Unknown Or Other 2025-06-17 · SS1033857-TBB · Other
service solution for floor covering bubbles
Showing the 6 most recent of 16 bulletins. Search all of them free at nhtsa.gov.
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.