Daimler Truck service campaign D24M3
What it saysField Service Campaign for Drilled Exhaust Rocker Arm Installation NHTSA’s full summary ↓
Daimler Truck filed this with NHTSA as a service campaign dated May 10, 2024, received Jun 5, 2024, about the engine — 3 documents under this number: D24M3-OWN LTR, D24M3-DLR LTR, D24M3-Bulletin. It names 5 model years across Freightliner and Western Star (2021–2023). A service campaign 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 · Western Star.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationField Service Campaign for Drilled Exhaust Rocker Arm Installation
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| D24M3-OWN LTR | Service campaign | May 10, 2024 | 11000964 | PDF, 474 KB |
| D24M3-DLR LTR | Service campaign | May 10, 2024 | 11000963 | PDF, 474 KB |
| D24M3-Bulletin | Service campaign | May 10, 2024 | 11000960 | PDF, 474 KB |
What the document itself lists
The manufacturer titles it “Drilled Exhaust Rocker Arm Installation”.
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| D24M3 | Drilled Exhaust Rocker Arm Installation | 3.1 hrs |
Read by machine from the document NHTSA serves (10 pages), read Sep 30, 2026. A part number is shown only where it matches Daimler Truck’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote.
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: 2021 Freightliner Cascadia; 2022 Freightliner Cascadia; 2023 Freightliner Cascadia.
Western Star 2 model years
Also filed against: 2022 Western Star 49X; 2023 Western Star 49X.
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 group12 other manufacturer communications filed against these Daimler Truck models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Freightliner list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TITANX EXTENSION | Warranty extension | Feb 4, 2026 | Standard Warranty Extension for vehicles with TitanX Radiators |
| 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 |
| F1014 | Emissions | Mar 25, 2025 | Emission recall for Western Star DEF Header |
| 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 |
| D24R4 | Emissions | Nov 27, 2024 | Detroit Emission recall for GHG14 DETROIT DD16 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 Western Star, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Daimler Truck D24M3 a recall?
No. A service campaign 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 D24M3 repair free?
A service campaign 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 D24M3 cover?
The manufacturer filed it against 5 model years across 2 brands (Freightliner and Western Star): 2021 Freightliner Cascadia, 2022 Freightliner Cascadia, 2023 Freightliner Cascadia, 2022 Western Star 49X, 2023 Western Star 49X. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.