Kenworth T680, Peterbilt 579, model years 2026 to 2027. Filed by PACCAR Incorporated and reported to NHTSA on 8 July 2026. 8 vehicles potentially affected.
What the notice says PACCAR Incorporated (PACCAR) is recalling certain 2026-2027 Peterbilt 579 and 2027 Kenworth T680 tractors. The trailer air connection quick release (QR) valve in the air brake system may have been incorrectly installed, which can cause the trailer to become unstable after the driver applies the brakes. As such, these …
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
Paccar's own number for this recall: 26PACC. That is the number on the owner letter and on the dealer paperwork. 26V442 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 26V442 cover?
- Kenworth T680, Peterbilt 579, model years 2026-2027.
- What is wrong with them?
- PACCAR Incorporated (PACCAR) is recalling certain 2026-2027 Peterbilt 579 and 2027 Kenworth T680 tractors.
- What can happen if it is not put right?
- An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
- Is there a fix yet?
- Yes, and it is free. Paccar inspected and reinstalled the valves, as necessary, free of charge. All affected tractors have been repaired and therefore no owner notification letters are necessary. Owners may contact Peterbilt's customer service at 1-940-591-4220 and Kenworth's customer service at 1-425-828-5888.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Paccar calls this recall 26PACC, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.”
affected
in the notice
caught
| Campaign | 26V442 |
|---|---|
| Filed by | PACCAR Incorporated |
| System at fault | Service Brakes, Air:Supply:Quick Release Valve |
| Reported to NHTSA | 8 July 2026 |
| Model years | 2026-2027 |
| Vehicles named | KENWORTH T680, PETERBILT 579 |
What the notice says today
The defect
PACCAR Incorporated (PACCAR) is recalling certain 2026-2027 Peterbilt 579 and 2027 Kenworth T680 tractors. The trailer air connection quick release (QR) valve in the air brake system may have been incorrectly installed, which can cause the trailer to become unstable after the driver applies the brakes. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
The consequence
An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
The remedy
Paccar inspected and reinstalled the valves, as necessary, free of charge. All affected tractors have been repaired and therefore no owner notification letters are necessary. Owners may contact Peterbilt's customer service at 1-940-591-4220 and Kenworth's customer service at 1-425-828-5888. PACCAR's number for this recall is 26PACC.
What it said before
Nothing has changed while we have been watching. We last read the wording of this campaign on 17 September 2026, and it matched the copy we already held.
That copy hashes to a4dbc01e63a63c9e87cabaf831c18367…, so if it is ever edited the change is provable rather than a matter of memory.
This is one of 353 notices in the record whose component field names service brakes, air. Across that group the median wait before owners were written to was 43 days.
Last checked . No change has been recorded in the wording.
The models named here, across their whole recall history
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 26V442, wording as read on 17 September 2026. https://carsmultiverse.com/recall/26v442/
The copy quoted above hashes to a4dbc01e63a63c9e87cabaf831c18367…. If the notice is reworded later, that fingerprint will not match, which is how a reader checks that the quotation was of the version we say it was.
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other Paccar notices we hold
- 26V544: 2027 Peterbilt 567, 579, 589 and 2027 Kenworth T680, T880, and W990
- 26V485: 2027 Peterbilt and Kenworth
- 26V022: 2026 Kenworth L770 and 2024-2026 Peterbilt 520
- 25V795: 2026 Peterbilt 567 and 589 trucks
- 25V569: 2024-2026 Kenworth T680, T880, and W990 trucks
- 25V353: 2024 Peterbilt 367, 2026 Peterbilt 548, 589, and 2024-2026 Peterbilt 567 trucks
- 25V182: 2021-2026 Peterbilt 220, 2022-2026 Kenworth K370, and 2020-2026 K270 Medium-Duty Battery Electric
- 25V181: 2022-2025 Peterbilt 520, 579, and 2021-2025 Kenworth T680 trucks
All 138 Paccar campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 26V442 on 23 August 2026, they were:
- Defect summary
c13a513e - Consequence
3deab809 - Remedy
2928dce3
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 26V442 · how the whole register is watched
71 days after this was filed with the regulator, the register still carries no date for the letter to owners. The sixty days 49 CFR 577.7 allows have passed. A blank there is a gap in the record, which is not the same as a gap in the post: where this maker stands on the sixty days.
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Owners of these cars
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