Recall 26V442 covers 8 2026-2027 Peterbilt 579 and Kenworth T680 tractors for incorrectly installed brake valves. Valves were reinstalled free.
Peterbilt is recalling 8 2026-2027 579 and T680 tractors because the trailer air connection quick release valve in the air brake system was installed incorrectly. When the driver applies the brakes, the trailer can become unstable, increasing crash risk; the dealer repair will be free once available.
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What's wrong?
The trailer air connection quick release valve is part of the air brake system on the 2026-2027 579 and T680 tractors covered by NHTSA campaign 26V442. It helps control air pressure at the trailer connection, so the trailer brakes apply and release in the intended timing after the driver presses the brake pedal. The valve has a marking that shows the trailer side, and that marking is supposed to face the trailer.
On these tractors, the trailer air connection design showed the fastbreak valve facing the wrong way, opposite normal air flow to the trailer. That led to the quick release valve being installed backwards. With the valve reversed, brake application and release timing no longer matches the intended air brake system setup, and the trailer can become unstable after the driver applies the brakes.
There is no warning sign before failure. The filing lists no driver-visible symptom before the trailer becomes unstable, so the VIN and inspection decide whether this tractor is included.
Who's affected?
Covers the 579 and T680 across the 2026 and 2027 model years, with each truck tied to the brake system.
| 2026 Peterbilt 579 | brake system |
|---|---|
| 2027 Peterbilt 579 | brake system |
| 2027 Kenworth T680 | brake system |
| Units affected | 8 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
An incorrectly installed quick release valve can keep the air brake system from working as intended, increasing crash risk. No warning sign is listed, so confirm your VIN and ask the dealer whether the inspection and valve reinstall are complete. Repair will be free at any franchised Peterbilt dealer once available.
What should I do?
- Check your VIN to confirm your 2026-2027 Peterbilt 579 or T680 tractor is included in this recall.
- Contact a franchised Peterbilt dealer if your VIN still shows this recall open.
- Ask the dealer to confirm the trailer air quick release valve was inspected and reinstalled so the trailer stays stable when braking.
- Reference recall number 26V442 when you call.
- Call Peterbilt customer service at 1-940-591-4220 with questions about the completed free repair.
What happens at the repair
Peterbilt says the affected tractors have already been inspected, with the trailer air connection quick release valve reinstalled where needed. That work was completed free of charge, so no owner notification letters are being sent for this recall. If you already paid out of pocket for the same valve repair before the recall work, ask the service desk or Peterbilt customer service how to submit documentation under the standard reimbursement plan on file.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 8, 2026 | NHTSA published the recall |
|---|
Frequently asked questions
What is recall 26V442?
Recall 26V442 covers 8 2026-2027 Peterbilt 579 and T680 tractors with a trailer air connection quick release valve installed incorrectly in the air brake system. The defect can make the trailer unstable after braking and increase crash risk. Peterbilt inspected and reinstalled the valves for free.
What should I do if my 2026-2027 Peterbilt 579 or T680 is on this recall?
Check your VIN to confirm whether your specific tractor is included in recall 26V442. PACCAR says all affected tractors have already been repaired, so use the VIN result to confirm the repair status. If it still shows open, contact a franchised Peterbilt dealer and reference recall 26V442.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and PACCAR says the valve inspection and reinstallation were completed free of charge. If your VIN still shows an open recall, a franchised Peterbilt dealer handles the recall repair for free.
Is it safe to drive with recall 26V442 open?
The recall risk is tied to trailer instability after braking. An incorrectly installed quick release valve that does not function properly can increase the risk of a crash. Check your VIN first. If the recall is still open, ask a franchised Peterbilt dealer how to move the tractor in safely.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/26V442000 |
|---|---|
| Peterbilt customer service | 1-940-591-4220 |
| NHTSA recall # | 26V442 |
| NHTSA recall # (full) | 26V442000 |
Source documents
This article is generated from NHTSA's primary recall filings and reviewed against the source on July 26, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →