PACCAR Incorporated: Incorrectly Installed Quick Release Valve/FMVSS 121
Hazard
An incorrectly installed quick release valve that does not function properly can increase the risk of a crash.
Details
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.
Products affected
SERVICE BRAKES, AIR
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'… Confirm on the official NHTSA notice before acting.