Supply: quick release valveRecall 26V-442 · Kenworth and Peterbilt vehicles
PACCAR Incorporated recall 26V-442 covers 8 Kenworth and Peterbilt vehicles for a supply: quick release valve problem, reported to NHTSA on July 8, 2026.
Source: NHTSA recall 26V442000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
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."
The risk
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 repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from March 12, 2025 to February 10, 2026. Not every vehicle in these model years is included; check by VIN.