Service brakes, airRecall 23V-661 · Kenworth and Peterbilt vehicles
PACCAR Incorporated recall 23V-661 covers 254 Kenworth and Peterbilt vehicles for a service brakes, air problem, reported to NHTSA on September 29, 2023. The manufacturer's latest report (2025 Q4) shows 66% of affected vehicles repaired.
Source: NHTSA recall 23V661000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
PACCAR Incorporated (PACCAR) is recalling certain 2021-2024 Kenworth T280, T380, 2020-2024 Peterbilt 548, 536, 2024 Peterbilt 537, and 2020-2024 Kenworth T480 trucks. The timing of the trailer brake release may be delayed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
The risk
A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash.
The fix
Dealers will replace the fittings and hoses in the affected valves, free of charge. Owner letters were mailed January 15, 2024. Owners may contact Kenworth's customer service at 1-425-828-5888 and Peterbilt's customer service at 1-940-591-4220. PACCAR's numbers for this recall are 23KWJ and 23PBJ.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
66%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA. 2 vehicles were listed as unreachable.