- Vehicles
- 254
- Built between
- Not published
- Models
- 6
- Recall type
- Vehicle
- Initiated by
- Manufacturer
- Owners notified
- 15 January 2024
- Repaired
- 66%
- Unrepaired
- 85
Does this affect my vehicle?
The manufacturer did not publish a build-date range for this recall, so the model and year list below is the only way to tell whether your vehicle is covered.
- 2021-2024 Kenworth T280
- 2021-2024 Kenworth T380
- 2020-2024 Kenworth T480
- 2020-2024 Peterbilt 536
- 2024 Peterbilt 537
- 2020-2024 Peterbilt 548
Repair progress
85 of 254 vehicles in this recall had still not been repaired as of Q4 2025.
66% repaired — 167 of 254 reported
- Owners not reachable
- 2
Manufacturers file these figures with NHTSA each quarter. Vehicles the manufacturer could not trace, or that have been scrapped or exported, are counted separately and are not included in the unrepaired figure.
What the defect is
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."
What could happen
A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash.
What gets fixed
Dealers will replace the fittings and hoses in the affected valves, free of charge. Owner letters were mailed January 15, 2024.
Parts involved
- Valve-TP-3DC ASSEMBLY, NMDG90-1287-004, G90-1287-005, G90-1287-006Tractor Protection Valve
Part numbers are as filed by the manufacturer and are listed for reference. Your dealer will confirm the correct part for your vehicle.
Timeline
- Recall reported to NHTSA29 September 2023
- Owners notified15 January 2024
- Latest repair reportQ4 2025 — 66% repaired
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 29 September 2023.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Manufacturer contact
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.
Official source
- Manufacturer's recall number
- 23KWJ, 23PBJ
- Recalling manufacturer
- PACCAR Incorporated
- Safety standard
- FMVSS 121
- Recall initiated by
- MFR
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional 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.
Check your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.