Kenworth 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.
The short version
PACCAR Incorporated reported a problem with the supply quick release valve. Here is what owners need to know.
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."
An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
Paccar inspected and reinstalled the valves, as necessary, free of charge.
Affected vehicles
These model years are included in NHTSA campaign 26V-442.
| YEAR RANGE | MODEL |
|---|---|
| 2027 | Kenworth T680 |
| 2026–2027 | Peterbilt 579 |
What changed
Newest first. The record shows both when the recall began and what has changed since.
- Recall reported to NHTSA. LATEST
Drive one of these? Check your VIN to see if your specific vehicle is affected.
Check your VINWhat this record means
Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.
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MyAutoRecalls is not affiliated with PACCAR Incorporated or the National Highway Traffic Safety Administration.