Mack service campaign SC S4920 202604
Mack filed this with NHTSA as a service campaign dated Apr 2, 2026, received May 5, 2026, about the suspension. It names 6 model years (2024–2026). 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 - Trunion Nut Pinch Bolt.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC S4920 202604 | Service campaign | Apr 2, 2026 | 11032096 | PDF, 285 KB |
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: 2024 Mack LR; 2025 Mack LR; 2026 Mack LR; 2024 Mack Terrapro (te); 2025 Mack Terrapro (te); 2026 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.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mack, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mack SC S4920 202604 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 SC S4920 202604 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 SC S4920 202604 cover?
The manufacturer filed it against 6 model years: 2024 Mack LR, 2025 Mack LR, 2026 Mack LR, 2024 Mack Terrapro (te), 2025 Mack Terrapro (te), 2026 Mack Terrapro (te). Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.