PACCAR bulletin 43-087
What it saysEMY21-25 GHG Label Replacement (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation. NHTSA’s full summary ↓
PACCAR filed this with NHTSA as an emissions communication dated May 5, 2026, received May 6, 2026, about the engine — 3 documents under this number. It names 56 model years across Kenworth and Peterbilt (2021–2026). An emissions communication 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: Kenworth · Peterbilt.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
EMY21-25 GHG Label Replacement (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation. (PB) Certain Model 367 / 389 / 567 / 579 / 589 have updated GHG labels available for order and installation.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 43-087 | Service bulletin | May 5, 2026 | 11033349 | PDF, 186 KB |
| 43-087 | Service bulletin | Apr 28, 2026 | 11032295 | PDF, 186 KB |
| 43-087 | Emissions | Apr 4, 2026 | 11032297 | PDF, 598 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 themKenworth 31 model years
Also filed against: 2022 Kenworth T680; 2023 Kenworth T680; 2024 Kenworth T680; 2025 Kenworth T680; 2026 Kenworth T680; 2022 Kenworth T800; 2023 Kenworth T800; 2024 Kenworth T800; 2025 Kenworth T800; 2022 Kenworth T800B; 2023 Kenworth T800B; 2024 Kenworth T800B; 2025 Kenworth T800B; 2022 Kenworth T880; 2023 Kenworth T880; 2024 Kenworth T880; 2025 Kenworth T880; 2026 Kenworth T880; 2022 Kenworth W900; 2023 Kenworth W900; 2024 Kenworth W900; 2025 Kenworth W900; 2022 Kenworth W900B; 2023 Kenworth W900B; 2024 Kenworth W900B; 2025 Kenworth W900B; 2022 Kenworth W990; 2023 Kenworth W990; 2024 Kenworth W990; 2025 Kenworth W990; 2026 Kenworth W990.
Peterbilt 25 model years
Also filed against: 2021 Peterbilt 367; 2022 Peterbilt 367; 2023 Peterbilt 367; 2024 Peterbilt 367; 2025 Peterbilt 367; 2021 Peterbilt 389; 2022 Peterbilt 389; 2023 Peterbilt 389; 2024 Peterbilt 389; 2025 Peterbilt 389; 2021 Peterbilt 567; 2022 Peterbilt 567; 2023 Peterbilt 567; 2024 Peterbilt 567; 2025 Peterbilt 567; 2026 Peterbilt 567; 2021 Peterbilt 579; 2022 Peterbilt 579; 2023 Peterbilt 579; 2024 Peterbilt 579; 2025 Peterbilt 579; 2026 Peterbilt 579; 2024 Peterbilt 589; 2025 Peterbilt 589; 2026 Peterbilt 589.
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 group19 other manufacturer communications filed against these PACCAR models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Kenworth list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| E340 | Emissions | Oct 16, 2026 | KW Certain vehicle model year 2026 Kenworth chassis equipped with EMY2025 PACCAR MX engines require an amended engine label. The engine labe… |
| P001 | Service campaign | Sep 11, 2026 | "KW: The chassis list has been updated to include 1 chassis. The total chassis count is now 53. A link to the PACCAR Powertrain Prognostics… |
| 41-028 | Service campaign | Sep 5, 2026 | The campaign expiration date has been extended from 10/01/2026 to 04/01/2027. |
| P003 | Service campaign | Sep 3, 2026 | "KW: A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section. PB: The chassis list has been updated to incl… |
| P002 | Service campaign | Sep 3, 2026 | "KW: A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section. PB: The chassis list has been updated to incl… |
| E316 | Service campaign | Aug 1, 2026 | 235 chassis have been removed from the chassis list and unflagged in PRWS due to expiration of applicable warranty coverage. 5 chassis have… |
| E335 | Emissions | Jul 18, 2026 | Expiration Date Format Update - Certain EPA21 compliant PACCAR MX-13 engines were built with intake valve springs that could fail. This fail… |
| CE033 | Warranty extension | Jun 25, 2026 | "KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to this warranty policy." |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kenworth and Peterbilt, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is PACCAR 43-087 a recall?
No. A emissions communication 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 43-087 repair free?
A emissions communication 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 43-087 cover?
The manufacturer filed it against 56 model years across 2 brands (Kenworth and Peterbilt): 2022 Kenworth T680, 2023 Kenworth T680, 2024 Kenworth T680, 2025 Kenworth T680, 2026 Kenworth T680, 2022 Kenworth T800 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 12 Jan 2021 – 13 Nov 2025; built 29 Jan 2021 – 13 Nov 2025 — the build date is on the certification label in the driver’s door jamb.