Thomas Built Buses Saf-T-Liner Efx, Thomas Built Buses Saf-T-Liner Hdx, model years 2023 to 2026. Filed by Daimler Trucks North America, LLC and reported to NHTSA on 14 February 2026. 2,843 vehicles potentially affected.
What the notice says 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.
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
Thomas Built Buses's own number for this recall: F1030. That is the number on the owner letter and on the dealer paperwork. 26V086 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 26V086 cover?
- Thomas Built Buses Saf-T-Liner Efx, Thomas Built Buses Saf-T-Liner HDX, model years 2023-2026.
- What is wrong with them?
- 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.
- What can happen if it is not put right?
- Contact with hot heating coolant may burn occupants, increasing the risk of injury.
- Is there a fix yet?
- Yes, and it is free. 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.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Thomas Built Buses calls this recall F1030, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “Contact with hot heating coolant may burn occupants, increasing the risk of injury.”
affected
in the notice
caught
| Campaign | 26V086 |
|---|---|
| Filed by | Daimler Trucks North America, LLC |
| System at fault | Engine And Engine Cooling:Cooling System:Hoses/Lines/Piping/Fittings |
| Reported to NHTSA | 14 February 2026 |
| Model years | 2023-2026 |
| Vehicles named | THOMAS BUILT BUSES SAF-T-LINER EFX, THOMAS BUILT BUSES SAF-T-LINER HDX |
What the notice says today
The 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.
The consequence
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.
What it said before
Nothing has changed while we have been watching. We last read the wording of this campaign on 17 September 2026, and it matched the copy we already held.
That copy hashes to 9d4c1f703d5ade9d033593dda4b8c110…, so if it is ever edited the change is provable rather than a matter of memory.
This is one of 588 notices in the record whose component field names engine and engine cooling. Across that group the median wait before owners were written to was 47 days.
Last checked . No change has been recorded in the wording.
The models named here, across their whole recall history
- Thomas Built Buses Saf-T-Liner Efx recalls: 42 US campaigns
- Thomas Built Buses Saf-T-Liner HDX recalls: 78 US campaigns
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 26V086, wording as read on 17 September 2026. https://carsmultiverse.com/recall/26v086/
The copy quoted above hashes to 9d4c1f703d5ade9d033593dda4b8c110…. If the notice is reworded later, that fingerprint will not match, which is how a reader checks that the quotation was of the version we say it was.
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 26V086 on 23 August 2026, they were:
- Defect summary
2eb79ac8 - Consequence
aa96375f - Remedy
4775a3ae
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 26V086 · how the whole register is watched
This notice names one vehicle among several registers that have written about it. Every notice this site holds for the Thomas Built Buses Saf-T-Liner Efx, in all seven, is kept on that vehicle's own page, with the newest in each.
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Owners of these cars
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