Daimler Truck service campaign SF721
What it saysField Service Campaign for SF721 18k Front Suspension Shock Absorbers NHTSA’s full summary ↓
Daimler Truck filed this with NHTSA as a service campaign dated Sep 24, 2025, received Oct 3, 2025, about the suspension — 3 documents under this number: SF721-OWN LTR, SF721-DLR LTR, SF721-Bulletin. It names 7 model years across Freightliner and Western Star (2021–2025). 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 SF721 18k Front Suspension Shock Absorbers
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SF721-OWN LTR | Service campaign | Sep 24, 2025 | 11023686 | not found |
| SF721-DLR LTR | Service campaign | Sep 24, 2025 | 11023685 | not found |
| SF721-Bulletin | Service campaign | Sep 24, 2025 | 11023684 | 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 5 model years
Also filed against: 2021 Freightliner Cascadia; 2022 Freightliner Cascadia; 2023 Freightliner Cascadia; 2024 Freightliner Cascadia; 2025 Freightliner Cascadia.
Western Star 2 model years
Also filed against: 2024 Western Star 57X; 2025 Western Star 57X.
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 suspension
Source: same model, same component group1 other manufacturer communication filed against these Daimler Truck models under the same component group (suspension), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SF700 | Service campaign | Jun 27, 2024 | Field Service Campaign for Hadley (Link) Smart Valve |
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 SF721 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 SF721 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 SF721 cover?
The manufacturer filed it against 7 model years across 2 brands (Freightliner and Western Star): 2021 Freightliner Cascadia, 2022 Freightliner Cascadia, 2023 Freightliner Cascadia, 2024 Freightliner Cascadia, 2025 Freightliner Cascadia, 2024 Western Star 57X and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.