United StatesCertain 2026–2027 Peterbilt 579 and 2027 Kenworth T680 tractors (8 potentially affected; NHTSA campaign 26V442000, manufacturer campaign 26PACC) are included in this recall. The trailer air connection quick release (QR) valve may have been incorrectly installed, which can make the trailer unstable after the driver applies the brakes and fails FMVSS 121. PACCAR inspected and reinstalled the valves as necessary free of charge, all affected tractors have been repaired so no owner notification letters are necessary, and owners may contact Peterbilt at 1-940-591-4220 or Kenworth at 1-425-828-5888.
What's being recalled
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."
How to identify it
NHTSA campaign 26V442000; Manufacturer campaign 26PACC
The hazard
An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
What to do
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.
The official notice
This page is a summary of the notice published by U.S. National Highway Traffic Safety Administration, collected from U.S. National Highway Traffic Safety Administration. Check the original before you act on it.
Read the official notice (opens in a new tab)