Campaign 26V-087

Heater hose clamps may not have been tightened properly, causing the hose to disconnect and leak heating coolant inside the passenger compartment

Defect summary

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.

Consequence

Contact with hot heating coolant may burn occupants, increasing the risk of injury.

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.

Source: NHTSA ODI recalls file, campaign 26V087000. Text as published by NHTSA.

Vehicles covered

2 product lines are covered

Owner complaints filed with NHTSA about engine and cooling on these vehicles: 0, of which 0 involved a crash, fire, injury or death. Complaints are not verified by NHTSA.

Vehicles covered by campaign 26V-087
Make	Model	Model years	Complaints on this component
Thomas Built Buses	Saf-T-Liner EFX	2023 to 2025	0
Thomas Built Buses	Saf-T-Liner HDX	2023 to 2026	0

Source: NHTSA ODI recalls and complaints files. Equipment, tire and child-seat campaigns list products, not vehicles.

Investigation

No NHTSA investigation is linked to this recall

Most recalls are started by the manufacturer. This one lists "Manufacturer" as its origin.

Before the recall

No service bulletins on this component preceded the recall

Distinct manufacturer communications on the same component group, make, model and model year in the 24 months before the report date.

Source: NHTSA manufacturer communications file.

Service bulletins

26V-109 Feb 24, 2026
Heater hose may rupture, which can result in hot coolant leaking inside the passenger compartment
26V-086 Feb 13, 2026
Heater hose clamps may not have been tightened properly, causing the hose to disconnect and leak heating coolant inside the passenger compartment
24V-924 Dec 11, 2024
Engine protection and inducement software may cause the engine to shut down unexpectedly
23V-737 Nov 2, 2023
Rear lifting bracket that attaches to the engine cylinder head may be insufficiently secured, which can allow it to detach
22V-554 Jul 29, 2022
Engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down
22V-553 Jul 29, 2022
Engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down