NHTSA campaign 23V661000 · Manufacturer campaign 23KWJ, 23PBJ
Kenworth and Peterbilt Recall 23V-661: Delayed Trailer Brake Release/FMVSS 121
NHTSA recall 23V661000 (Manufacturer campaign 23KWJ, 23PBJ) was reported by PACCAR Incorporated on September 29, 2023, with 254 vehicles potentially affected (per NHTSA). NHTSA's record lists the Kenworth T480, Peterbilt 536, Peterbilt 548 and more for model years 2020–2024. Owners were notified on January 15, 2024, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 23V661000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 23V661000 (also written 23V-661 or 23V661)
- Filed by
- PACCAR Incorporated
- Manufacturer campaign number
- 23KWJ, 23PBJ
- Report received
- Potentially affected
- 254 vehicles (per NHTSA)
- Component
- Service Brakes, Air
- Owners notified
- Safety standard
- FMVSS 121
Repair completion: 65.75% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 23V661000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
NHTSA's recall notice
As NHTSA's recall record states it for campaign 23V661000.
Defect description
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."
Safety consequence
A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash.
Manufacturer remedy
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.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Sources
Official NHTSA notice for recall 23V661000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.