Thomas Built Buses bulletin FL997
Thomas Built Buses filed this with NHTSA as a emissions communication dated Nov 25, 2025, received Aug 2, 2024, about the engine — 7 documents under this number: FL997-DLR LTR, FL997-Bulletin, FL997-OWN LTR. It names 6 model years (2019–2024). A emissions communication is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationRevised emissions recall for FCCC Clean Idle Label
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| FL997-DLR LTR | Emissions | Nov 25, 2025 | 11025890 | not yet checked |
| FL997-Bulletin | Emissions | Nov 25, 2025 | 11025887 | not yet checked |
| FL997-DLR LTR | Emissions | Jan 7, 2025 | 11013222 | not yet checked |
| FL997-Bulletin | Emissions | Jan 7, 2025 | 11013208 | not yet checked |
| FL997-OWN LTR | Emissions | Jul 11, 2024 | 11005481 | not yet checked |
| FL997-DLR LTR | Emissions | Jul 11, 2024 | 11005474 | not yet checked |
| FL997-Bulletin | Emissions | Jul 11, 2024 | 11005460 | not yet checked |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themAlso filed against: 2019 Thomas Built Buses SAF-T-Liner C2; 2020 Thomas Built Buses SAF-T-Liner C2; 2021 Thomas Built Buses SAF-T-Liner C2; 2022 Thomas Built Buses SAF-T-Liner C2; 2023 Thomas Built Buses SAF-T-Liner C2; 2024 Thomas Built Buses SAF-T-Liner C2.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
Common questions
Source: NHTSA, 49 CFR 579.5Is Thomas Built Buses FL997 a recall?
No. A emissions communication is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls.
Is the FL997 repair free?
A emissions communication is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does FL997 cover?
The manufacturer filed it against 6 model years: 2019 Thomas Built Buses SAF-T-Liner C2, 2020 Thomas Built Buses SAF-T-Liner C2, 2021 Thomas Built Buses SAF-T-Liner C2, 2022 Thomas Built Buses SAF-T-Liner C2, 2023 Thomas Built Buses SAF-T-Liner C2, 2024 Thomas Built Buses SAF-T-Liner C2. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.