2026–2027 Kenworth T680, Peterbilt 579: Service Brakes, Air recall
NHTSA campaign 26V442000 · 8 units potentially affected · filed Jul 8, 2026
What's 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."
Why it matters
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.
Recall details
- NHTSA campaign
- 26V442000
- Manufacturer no.
- 26PACC
- Manufacturer
- Paccar Incorporated
- Component
- SERVICE BRAKES, AIR:SUPPLY:QUICK RELEASE VALVE
- Units affected
- 8
- Report received
- Jul 8, 2026
- Owner letters
- —
- Type
- Vehicle
Check whether your vehicle is included with the official NHTSA VIN lookup or your dealer. Repairs for safety recalls are free.
Vehicles covered
- Kenworth T680 2027
- Peterbilt 579 2026, 2027