10/23/23, 8:10 AM

Aftersales Service - Federal Recall Bulletin

Safety Recall 23PBJ: 536/537/548 Delayed Trailer Brake
Release
Number

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23PBJ / 23V661 / 2023-524

Supplier
Peterbilt

Description
Safety Recall 23PBJ: 536, 537, and 548 NMD Brake Timing

Date
10/18/2023

What’s New
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.
Parts and repair procedures are not yet available. This bulletin will be updated when a repair path is
determined.

Introduction
Certain 536, 537, and 548 chassis built with 2.1m Medium Duty End of Frame Trailer Connections may exceed
trailer brake release timing requirements of FMVSS/CMVSS No. 121 by 0.5 seconds. A delay in the trailer brake

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10/23/23, 8:10 AM

Aftersales Service - Federal Recall Bulletin

release can create instability to the trailer and increase the risk of a crash. Truck and Trailer brake application
timing is not affected, nor is brake performance affected.

Situation
141 Peterbilt chassis (139 US and 2 Canada) model year 2020-2024 536, 537, and 548 chassis built from 7/31/2019
through 9/8/2023 with 2.1m Medium Duty End of Frame Trailer Connections and Tractor protection valves.

Resolution
Safety Recall: Interim Notification
Peterbilt is currently working on a resolution for this concern. Parts and repair procedures are not yet available.
This bulletin will be updated when a repair path is determined.

Federal Law
​It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or
noncompliance has been corrected.

Links
23PBJ US Customer Letter
23PBJ Canada Customer Letter
23PBJ Chassis List

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Select the date.

IMPORTANT SAFETY RECALL
Interim Notification

This notice applies to your vehicle. Your VIN(s) can be found on the bottom or back of this page.
Subject:

Safety Recall 23PBJ: 536/537/548 Delayed Trailer Brake Release
NHTSA Recall number: 23V-661
EXPIRATION DATE: NONE

Dear Peterbilt Customer,
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Peterbilt has decided that a defect which relates to motor vehicle safety exists in certain model year 2020-2024 536, 537, and 548 vehicles
built from 07/31/2019 through 09/08/2023 that are equipped with 2.1m medium duty end of frame trailer connections, tractor protection
valves and connecting hoses. Affected vehicles fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) No. 121, “Air Brake
Systems”.
The timing of the trailer brake release may be delayed which can create instability to the trailer and increase the risk of a crash. Truck and
Trailer brake application timing is not affected, nor is truck brake performance affected.
What is the problem?

The timing of the trailer brake release may be delayed.

What will your dealer do?

At this time, parts and procedures necessary to complete repairs are not yet available. You
will receive an updated letter once parts are available.

What should you do?

No action is required on your part at this time.

Peterbilt Motors Company has initiated this recall to remedy the issue with no charge to you. Currently, repair parts and procedures are
unavailable to correct this condition. However, Peterbilt is required to notify customers of the existence of the identified safety
defect. You will be notified by mail when the parts and procedures become available.
If you require further information about this recall or experience any difficulty in making arrangements for this repair, please contact the
Peterbilt Customer Experience Department at PB.Tech.Pubs.Dept@paccar.com.
If you conclude that Peterbilt has not enabled you to remedy this defect in a reasonable time and without charge, you may submit a
complaint to: Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E., Washington, DC 20590, or call
the toll free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten
days. If you no longer own this vehicle, we would appreciate your advising us of the new owner. Please send all known ownership and
address changes to PBDiv.Warranty.Docs@paccar.com.
We apologize for any inconvenience this preventive procedure may cause and thank you for your participation in helping Peterbilt provide
the highest levels of customer satisfaction and service expertise. We value your business and appreciate your ongoing loyalty to Peterbilt
and its dealer network. Industry-leading quality, performance and reliability are hallmarks of Peterbilt products, and we thank you for
making Peterbilt your truck of choice.
Sincerely,

Michelle Ponsonby
Director of Customer Experience
Peterbilt Motors Company

Select the date.

IMPORTANT SAFETY RECALL
Interim Notification

This notice applies to your vehicle. Your VIN(s) can be found on the bottom or back of this page.
Subject:

Safety Recall 23PBJ: 536/537/548 Delayed Trailer Brake Release
Transport Canada Recall: 2023-524
EXPIRATION DATE: NONE

Dear Peterbilt Customer,
This notice is sent to you in accordance with the requirements of the Motor Vehicle Safety Act. This is to inform you that your vehicle may
contain a defect that could affect the safety of a person.
Peterbilt has decided that a defect which relates to motor vehicle safety exists in certain model year 2020-2024 536, 537, and 548 vehicles
built from 07/31/2019 through 09/08/2023 that are equipped with 2.1m medium duty end of frame trailer connections, tractor protection
valves and connecting hoses. Affected vehicles fail to conform to Canada Motor Vehicle Safety Standard (CMVSS) No. 121, “Air Brake
Systems”.
The timing of the trailer brake release may be delayed which can create instability to the trailer and increase the risk of a crash. Truck and
Trailer brake application timing is not affected, nor is truck brake performance affected.
What is the problem?

The timing of the trailer brake release may be delayed.

What will your dealer do?

At this time, parts and procedures necessary to complete repairs are not yet available. You
will receive an updated letter once parts are available.

What should you do?

No action is required on your part at this time.

Peterbilt Motors Company has initiated this recall to remedy the issue with no charge to you. Currently, repair parts and procedures are
unavailable to correct this condition. However, Peterbilt is required to notify customers of the existence of the identified safety
defect. You will be notified by mail when the parts and procedures become available.
If you require further information about this recall or experience any difficulty in making arrangements for this repair, please contact the
Peterbilt Customer Experience Department at PB.Tech.Pubs.Dept@paccar.com.
For additional information about the recall, you can contact Transport Canada at 1-800-333-0510.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten
days. If you no longer own this vehicle, we would appreciate your advising us of the new owner. Please send all known ownership and
address changes to PBDiv.Warranty.Docs@paccar.com.
We apologize for any inconvenience this preventive procedure may cause and thank you for your participation in helping Peterbilt provide
the highest levels of customer satisfaction and service expertise.
We value your business and appreciate your ongoing loyalty to Peterbilt and its dealer network. Industry-leading quality, performance and
reliability are hallmarks of Peterbilt products, and we thank you for making Peterbilt your truck of choice.
Sincerely,

Michelle Ponsonby
Director of Customer Experience
Peterbilt Motors Company

Sélectionner la date

IMPORTANT RAPPEL DE SÉCURITÉ
Notification provisoire

Cet avis concerne votre véhicule. Votre (vos) NIV(s) se trouve(nt) au bas ou au verso de la présente.
Objet : Rappel de sécurité 23PBJ : Délai dans l’application des freins de la remorque sur modèles 536/537/548
Rappel de Transport Canada : 2023-524
DATE D’EXPIRATION : AUCUNE
Cher client Peterbilt,
Le présent avis vous est envoyé conformément aux exigences de la Loi sur la sécurité automobile. La présente a pour but de vous
informer que votre véhicule est susceptible d’avoir un défaut qui pourrait porter atteinte à la sécurité humaine.
Peterbilt a constaté qu’une défectuosité reliée à la sécurité des véhicules automobiles est présente dans certains véhicules de modèles
536, 537 et 548 des années 2020 à 2024, fabriqués entre le 31/07/2019 et le 08/09/2023, équipés de branchements de classe moyenne
de 2.1m à la traverse de la remorque, de soupapes de protection de la remorque et de flexibles de liaison. Les véhicules concernés ne se
conforment pas aux normes de sécurité des véhicules canadiens (CMVSS) no. 121, "Systèmes de freins pneumatiques".
Le chronométrage de l’application des freins de la remorque peut être retardé, ce qui pourrait créer une instabilité de la remorque et
augmenter le risque d’accident. Le chronométrage de l’application des freins du camion et de la remorque n’est pas affecté, pas plus que
la performance de freinage du camion.
Quel est le problème ?

Le chronométrage de l’application des freins de la remorque peut être retardé.

Que fera votre concessionnaire ?

Présentement, les pièces ainsi que les procédures nécessaires afin de compléter les
réparations ne sont pas disponibles. Vous recevrez une lettre de mise à jour une fois que les
pièces seront disponibles.

Que devriez-vous faire ?

Aucune action n’est requise de votre part présentement.

Peterbilt Motors Company a mis en place ce rappel afin de remédier au problème, sans frais. Présentement, les pièces ainsi que les
procédures nécessaires afin de corriger cette situation ne sont pas disponibles. Cependant, Peterbilt se doit d’aviser ses clients de la
présence de la défectuosité concernée et reliée à la sécurité. Vous serez avisé, par la poste, lorsque les pièces et les procédures seront
disponibles.
Si vous avez besoin de plus d’information au sujet de ce rappel ou rencontrez des difficultés à prendre rendez-vous pour cette réparation,
veuillez communiquer avec le département de l’expérience client de Peterbilt sur PB.Tech.Pubs.Dept@paccar.com.
Pour de l’information additionnelle au sujet de ce rappel, vous pouvez communiquer avec Transport Canada au 1-800-333-0510.
La loi fédérale nécessite de tout bailleur de véhicules qui reçoit cet avis de rappel d’en faire parvenir une copie à toute personne ayant
loué un véhicule et ce, dans un délai de dix jours. Si ce véhicule ne vous appartient plus, nous apprécierions que vous nous fassiez part
du nom du nouveau propriétaire, si vous le connaissez. Veuillez faire parvenir tout information relative au nouveau propriétaire et son
adresse à PBDiv.Warranty.Docs@paccar.com.
Nous nous excusons pour tout inconvénient causé par cette procédure préventive et vous remercions de votre participation afin d’aider
Peterbilt à offrir les plus hauts niveaux de satisfaction de la clientèle et d’expertise de service.
Nous apprécions votre entreprise ainsi que votre constante fidélité envers Peterbilt et son réseau de concessionnaires. Les produits
Peterbilt se distinguent en étant leader de l’industrie en matière de qualité, performance et fiabilité; et nous vous remercions de faire d’un
Peterbilt votre camion préféré.
Salutations,

Michelle Ponsoby
Directrice de l’expérience client
Peterbilt Motors Company