Mack service campaign S4342 022026
Mack filed this with NHTSA as a service campaign dated Feb 1, 2026, received Mar 3, 2026, about the fuel/propulsion system. It names 10 model years (2024–2025). 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationSC - Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does not meet our specifications.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| S4342 022026 | Service campaign | Feb 1, 2026 | 11029453 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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: 2024 Mack Anthem (an); 2025 Mack Anthem (an); 2024 Mack Granite (gr); 2025 Mack Granite (gr); 2024 Mack LR; 2025 Mack LR; 2024 Mack Pinnacle (pi/pn); 2025 Mack Pinnacle (pi/pn); 2024 Mack Terrapro (te); 2025 Mack Terrapro (te).
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 Mack S4342 022026 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 S4342 022026 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 S4342 022026 cover?
The manufacturer filed it against 10 model years: 2024 Mack Anthem (an), 2025 Mack Anthem (an), 2024 Mack Granite (gr), 2025 Mack Granite (gr), 2024 Mack LR, 2025 Mack LR and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.