Daimler Truck bulletin D24R7
What it saysFor DD8 EGR Monitor Software Reprogramming NHTSA’s full summary ↓
Daimler Truck filed this with NHTSA as an emissions communication dated Jan 31, 2025, about the engine — 3 documents under this number: D24R7-OWN LTR, D24R7-DLR LTR, D24R7-Bulletin. It names 6 model years across Freightliner and Thomas Built Buses (2022–2024). An 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.
One page for every brand it was filed under. Each brand’s bulletins: Freightliner · Thomas Built Buses.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationEmission Recall for DD8 EGR Monitor Software Reprogramming
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| D24R7-OWN LTR | Emissions | Jan 31, 2025 | 11013295 | not found |
| D24R7-DLR LTR | Emissions | Jan 31, 2025 | 11013294 | not found |
| D24R7-Bulletin | Emissions | Jan 31, 2025 | 11013293 | not found |
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 themFreightliner 3 model years
Also filed against: 2022 Freightliner Business Class M2; 2023 Freightliner Business Class M2; 2024 Freightliner Business Class M2.
Thomas Built Buses 3 model years
Also filed against: 2022 Thomas Built Buses SAF-T-Liner HDX; 2023 Thomas Built Buses SAF-T-Liner HDX; 2024 Thomas Built Buses SAF-T-Liner HDX.
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.
More bulletins about the engine
Source: same model, same component group8 other manufacturer communications filed against these Daimler Truck models under the same component group (engine), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| F1015 | Emissions | Nov 14, 2025 | Revised Emissions Recall for VECI Label Emissions Recall |
| SF715 | Service campaign | Aug 29, 2025 | Field Service campaign for stalk switches |
| SF716 | Service campaign | May 23, 2025 | Field Service Campaign for DEF Regen Inhibit Dash Switch Indicator |
| D24M5 | Service campaign | Jan 30, 2025 | Detroit Field Service campaign for 2024 HDEP ACM Software Reprogramming. |
| D24R2 | Emissions | Dec 3, 2024 | Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming |
| WI24-019 | Warranty extension | Nov 11, 2024 | Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates |
| SF703 | Service campaign | Nov 4, 2024 | Field Service Campaign for Cummins Engine with Wired Regen Inhibit Switch |
| D24R5 | Emissions | Sep 3, 2024 | Detroit Emissions Recall Campaign for DD13 CARB 24 ACM Software Reprogramming |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Freightliner and Thomas Built Buses, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Daimler Truck D24R7 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 D24R7 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 D24R7 cover?
The manufacturer filed it against 6 model years across 2 brands (Freightliner and Thomas Built Buses): 2022 Freightliner Business Class M2, 2023 Freightliner Business Class M2, 2024 Freightliner Business Class M2, 2022 Thomas Built Buses SAF-T-Liner HDX, 2023 Thomas Built Buses SAF-T-Liner HDX, 2024 Thomas Built Buses SAF-T-Liner HDX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.