Kenworth / Peterbilt recall: Service brakes, air
What is wrong
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."
What could happen
An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
The fix
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.
Vehicles covered
- Kenworth T680 2027
- Peterbilt 579 2026–2027
Facts
- NHTSA recall number
- 26V442000
- Type
- Vehicle
- Filed by
- Paccar Incorporated
- Reported to NHTSA
- Jul 8, 2026
- Owners notified
- Not yet
- Vehicles or items affected
- 8
- Started by
- The manufacturer
- Built
- Mar 12, 2025 to Mar 12, 2025
- Part
- Service brakes, air › Supply › Quick release valve
- Maker's own recall number
- 26PACC
- Safety standard
- FMVSS 121
Other recalls for the same vehicles
- Kenworth / Peterbilt recall: Seat belts Oct 14, 2026
- Kenworth / Peterbilt recall: Seats Aug 21, 2026
- Kenworth / Peterbilt recall: Electrical system Jul 27, 2026
- Kenworth / Peterbilt recall: Exterior lighting Jun 26, 2025
- Kenworth / Peterbilt recall: Electrical system Mar 24, 2025
- Kenworth / Peterbilt recall: Electrical system Dec 9, 2024
To check one car, enter its 17-character VIN on the official NHTSA page: a recall may cover only some vehicles of a model year.
Recall data: National Highway Traffic Safety Administration (NHTSA). Nebula is not affiliated with or endorsed by NHTSA.