Kenworth service campaign FS015
Kenworth filed this with NHTSA as a service campaign dated Jan 29, 2026, received Dec 5, 2025, about the power train — 2 documents under this number. It names 2 model years (2022–2023). 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationCertain chassis equipped with a PACCAR TX-12 transmission have Mechatronic Transmission Module (MTM) rail cylinder cap screws that could become loose. This may cause the transmission not to shift and the transmission service lamp to illuminate.
Documents filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| FS015 | Service campaign | Jan 29, 2026 | 11028312 |
| FS015 | Service bulletin | Nov 10, 2025 | 11026419 |
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: 2022 Kenworth T680; 2023 Kenworth T680.
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 Kenworth FS015 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 FS015 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 FS015 cover?
The manufacturer filed it against 2 model years: 2022 Kenworth T680, 2023 Kenworth T680. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.