Recall 26V442000: 2026–2027 Peterbilt 579 and 1 other model

Report received

Jul 8, 2026

Manufacturer

PACCAR Incorporated

Potentially affected

8vehicles

Model years

2026–2027

Check your own vehicle. A recall applies only to vehicles within the affected build range. Enter your VIN at nhtsa.gov/recalls. Recall repairs are free at a franchised dealer.

What NHTSA recorded

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."

Possible 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.

Affected model years

Pages for each model year show complaints, parts, mileage and other recalls.

• 2027 Kenworth T6801 complaints
• 2026 Peterbilt 5791 complaints
• 2027 Peterbilt 5790 complaints