NHTSA recall 23V661000
A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.
| Published by | NHTSA (United States) |
|---|---|
| Campaign number | 23V661000 |
| Manufacturer's number | 23KWJ, 23PBJ |
| Manufacturer | PACCAR Incorporated |
| Reported | 2023-09-29 |
| Owners notified | 2024-01-15 |
| Component | SERVICE BRAKES, AIR |
| Units potentially affected | 254 |
| Part numbers | G90-1287-004, G90-1287-005, G90-1287-006 |
| Report | Quarterly report 8, for 2025 quarter 4 |
|---|---|
| Filed with NHTSA | 2026-01-23 |
| Vehicles in the campaign | 254 |
| Reported remedied | 167 (65%) |
| Reported unreachable | 2 |
| Reported removed | 0 |
These are the manufacturer's totals for the whole campaign at the end of 2025 quarter 4, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026-10-19.
What is wrong
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 can happen
A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash.
The 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.
| 2021 KENWORTH T280 | |
|---|---|
| 2022 KENWORTH T280 | |
| 2023 KENWORTH T280 | |
| 2024 KENWORTH T280 | |
| 2021 KENWORTH T380 | |
| 2022 KENWORTH T380 | |
| 2023 KENWORTH T380 | |
| 2024 KENWORTH T380 | |
| 2020 KENWORTH T480 | |
| 2021 KENWORTH T480 | |
| 2022 KENWORTH T480 | |
| 2023 KENWORTH T480 | |
| 2024 KENWORTH T480 | |
| 2020 PETERBILT 536 | |
| 2021 PETERBILT 536 | |
| 2022 PETERBILT 536 | |
| 2023 PETERBILT 536 | |
| 2024 PETERBILT 536 | |
| 2024 PETERBILT 537 | |
| 2020 PETERBILT 548 | |
| 2021 PETERBILT 548 | |
| 2022 PETERBILT 548 | |
| 2023 PETERBILT 548 | |
| 2024 PETERBILT 548 |
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| 24KWE/24PBE | 2026-01-06. Emissions. The parts section has been updated for clarity. The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “!” next to DNR/DNRP indicator, “-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle. |
|---|---|
| 24KWD | 2025-11-05. Service bulletin. SAFETY RECALL Additional chassis have been included. The chassis list has been updated. Certain T370 / T440 / T470 / T480 / T660 / T680 / T800 / T880 / W900 / C500 chassis may be equipped with air tank reservoirs that have less than twelve times the combined volume of all service brake chambers which fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) No.121, Air Brake Systems. |
| 25PBE | 2025-09-03. Service campaign. Parts and repair procedures are now available. Certain chassis may have a rear suspension tracking rod that interferes with the left rear brake valve components during full suspension travel. This interference could cause a loss of the rear service brake or ABS modulation for one rear axle wheel end, increasing the risk of a crash. |
| 13-065 | 2024-11-05. Service bulletin. 13-065 DAVIE4 Chassis Air Leak Testing Info Only A new test is now available in DAVIE4 to properly measure chassis air system pressure decay, provide test results, and pass/fail criteria. Your DAVIE tool must be at version 24.05 or newer for the test to be available. A test procedure document has also been made available that shows all necessary setup and testing procedure criteria (procedure document attached in Links section). The DAVIE4 “Check the air pressure decay rate” test and the test procedure document MUST be followed anytime a chassis comes in for a warranty related air system repair where excessive air system pressure decay is suspected. Warranty claims filed for air system pressure decay may be denied if DAVIE4 test AND test procedure have not been followed. |
| 23KWJ | 2024-01-05. Service bulletin. Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer Brake Release T280/T380/T480 Delayed Trailer Brake Release. Safety Recall Certain T280/T380/T480 chassis built with 2.1m Medium Duty End of Frame Trailer Connections and Tractor Protection Valves may not meet the standard trailer brake release timing requirements by 0.5 seconds. A delay in the trailer brake release may create momentary instability to the trailer and increase the risk of a crash. |
| 23PBJ | 2024-01-05. Service bulletin. Certain 536, 537, 548, and 567 chassis built with 2.1m Medium Duty End of Frame Trailer Connections and Tractor Protection Valves may not meet the standard trailer brake release timing requirements by 0.5 seconds. A delay in the trailer brake release may create momentary instability to the trailer and increase the risk of a crash. |
| 23KWJ | 2023-11-10. Service bulletin. Safety Recall Interim Notification Certain T280/T380/T480 chassis built with 2.1m Medium Duty End of Frame Trailer Connections may not meet the standard trailer brake release timing requirements by 0.5 seconds. A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash. Parts and repair procedures are not yet available. This bulletin will be updated when a repair path is determined. |
| 23PBJ | 2023-11-10. Service bulletin. Certain 536, 537, and 548 chassis built with 2.1m Medium Duty End of Frame Trailer Connections may exceed the standard trailer brake release timing requirements by 0.5 seconds due to the size of the tractor protection valve fitting and hose. A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash. |
| 23PBB | 2023-06-03. Service bulletin. Safety Recall The brake pedal plunger which connects the brake pedal to the brake valve may dislodge after the pedal is fully depressed, and rapidly released (side slip foot brake release). If the plunger in the brake pedal assembly dislodges the driver may be unable to apply the service brakes, which may increase the risk of a crash. |
| 23KWB | 2023-06-03. Service bulletin. Parts and repair procedures are now available. Kenworth has determined that a safety defect exists in certain Model Year 2021-2024 T280, T380, and T480 chassis with air brakes. The brake pedal plunger which connects the brake pedal to the brake valve may dislodge after the pedal is fully depressed, and rapidly released (side slip foot brake release). If the plunger in the brake pedal assembly dislodges, the driver may be unable to apply the service brakes, which may increase the risk of a crash. |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.