Vehicle recall 26V442000 · July 8, 2026
Peterbilt 579 and Kenworth T680
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…
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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."
- Consequence
- An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
- 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.
Recall details
- NHTSA campaign
- 26V442000
- Reported to NHTSA
- July 8, 2026
- Filed by
- PACCAR Incorporated
- Manufacturer campaign
- 26PACC
- Vehicles potentially affected
- 8
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Supply › Quick release valve
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Kenworth T680 (2027): 2027
- Peterbilt 579 (2026-2027): 2027, 2026
Has your Kenworth been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Kenworth dealer can also check your VIN. Recall repairs are free.