Missing R12 Relay Valve/FMVSS 121 – 2020 Kenworth T370

February 14, 2020 NHTSA CAMPAIGN NUMBER: 20V086000

Missing R12 Relay Valve/FMVSS 121

Increased brake activation timing may lengthen vehicle stopping distance, increasing the risk of a crash.

 

NHTSA Campaign Number: 20V086

Manufacturer PACCAR Incorporated

Components SERVICE BRAKES, HYDRAULIC

Potential Number of Units Affected 4

 

Summary

PACCAR Incorporated (PACCAR) is recalling certain 2020 Kenworth T370 long wheelbase vehicles with larger rear axle spacing. The vehicles may be missing a second R12 relay valve, causing increased brake activation timing. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, “Air Brake Systems.”

 

Remedy

PACCAR will notify owners, and Kenworth dealers will install a second R12 relay valve, free of charge. PACCAR issued owners an interim notification on April 14, 2020. The recall began May 6, 2020. Owners may contact Kenworth customer service at 1-425-828-5888. PACCAR’s number for this recall is 20KWA.

 

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.safercar.gov.

 

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April 14, 2020

IMPORTANT SAFETY RECALL

Interim Notification

Subject:

Safety Recall 20KWA – T370 with Primaax Rear Suspension and Type 2 Wheelbase manufactured without second R12 relay valve

NHTSA Recall number 20V086

This notice applies to your VIN;

 

Dear Kenworth Customer,

This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.

Kenworth Truck Company has decided that a defect, which relates to motor vehicle safety, exists in certain model year 2018-2020T370 vehicles manufactured from 09/17/2017 through 10/08/2019. Vehicles with a Primaax rear suspension and may have been manufactured without a second R12 relay valve. This may cause the vehicle to exceed brake timing performance requirements. This results in the vehicle exceeding the allowable actuation time defined in FMVSS 121 S5.3.3.Increased brake activation timing may lengthen vehicle stopping distance, increasing the risk of a crash.

The problem is…	A second relay valve may not have been installed.
What you must do …	After you receive a notification letter that  parts are available, contact your Kenworth Dealer to schedule an appointment for repair

 

The purpose of this letter is to notify you that Kenworth has initiated a recall to address the defect. At this time, replacement parts are not yet available from the component supplier. You will be notified when the repair parts/software update become(s) available and you may schedule an appointment with a dealer to obtain the repair.

If you require further information about this recall, please contact Kenworth Customer Service; provide your name, your dealer’s city and state, your phone number, your email address (optional), the last 8 digits of your VIN, the bulletin number, and your question, using one of the following:

Email: Kenworth.Campaigns@paccar.com with the bulletin number in the subject line

or

Mail: Kenworth Truck Company, P.O. Box 1000, Kirkland, WA 98083-1000, Attn: Customer Service Department or

Phone: 425-828-5888

You may submit a complaint to the 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 https://www.safercar.gov, if you believe that the manufacturer or dealer failed or was unable to remedy the defect without charge within a reasonable time following the earliest date upon which replacement parts become available.

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 if you know their name.

We regret any inconvenience that this work may cause you and appreciate your cooperation in this matter.

 

Thank you,

Annick Hollingsworth
Director of Service Platforms
Kenworth Truck Company

 

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May 6, 2020

IMPORTANT SAFETY RECALL

 

Subject:

Safety Recall 20KWA – T370 with Primaax Rear Suspension and Type 2 Wheelbase manufactured without second R12 relay valve

NHTSA Recall number 20V086

EXPIRATION DATE:  NONE

This notice applies to your VIN;

 

Dear Kenworth Customer,

This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.

Kenworth Truck Company has decided that a defect, which relates to motor vehicle safety, exists in certain model year 2018-2020 T370 vehicles manufactured from 09/17/2017 through 10/08/2019. Vehicles with a Primaax rear suspension may have been manufactured without a second R12 relay valve. This may cause the vehicle to exceed brake timing performance requirements. This results in the vehicle exceeding the allowable actuation time defined in FMVSS 121 S5.3.3. Increased brake activation timing may lengthen vehicle stopping distance, increasing the risk of a crash.

The problem is…	A second relay valve may not have been installed.
What your dealer will do…	Dealers will install the second relay valve if it is not already installed.
What you must do …	Contact your Kenworth Dealer to schedule an appointment for repair

 

Kenworth has initiated a recall to remedy the defect. Please contact your Kenworth dealer. To find your Kenworth dealer, please visit Dealer Locator at www.Kenworth.com or scan the QR code. This repair may take up to  3.0 hours of labor depending on vehicle configuration and dealer scheduling. This repair will be performed at no charge to you.

If you had this repair performed before you received this letter, you may be eligible to receive reimbursement for the cost of obtaining a pre-notification remedy of the problem associated with this recall. Receipts for parts and/or labor are required for consideration of reimbursement.

If you require further information about this campaign, reimbursement of a pre-notification remedy associated with this recall, or experience any difficulty in making arrangements for this repair, please contact Kenworth Customer Service; provide your name, your dealer’s city and state, your phone number, your email address (optional), the last 8 digits of your VIN, the bulletin number, and your question, using one of the following:

Email: Kenworth.Campaigns@paccar.com with the bulletin number in the subject line

or

Mail: Kenworth Truck Company, P.O. Box 1000, Kirkland, WA 98083-1000, Attn: Customer Service Department or

Phone: 425-828-5888

If you conclude that Kenworth Truck Company has not enabled you to remedy this defect in 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 https://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 if you know their name.

We regret any inconvenience that this work may cause you and appreciate your cooperation in this matter.

 

Thank you,

Annick Hollingsworth
Director of Service Platforms
Kenworth Truck Company

 

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Recall 20KWA: T370 Primaax Rear Suspension Manufactured Without Second R12 Relay Valve

 

Federal Recall Information

 

20KWA

Supplier

PACCAR

 

Description

Recall 20KWA T370 Primaax Rear Suspension manufactured without second R12 relay valve

 

Release Date

4/15/2020

 

Introduction

Kenworth Truck Company has determined that a defect, which relates to motor vehicle safety, exists in certain T370 model chassis manufactured between September 27, 2017 and October 08, 2019. Revision Notes

05/04/2020: Updated parts list to clearly indicate which parts must be ordered through DSP and PPD.

04/28/2020: Bulletin updated with parts, repair instruction, and warranty claim information.

 

Situation

24 T370 chassis (4 U.S. and 20 Canada) model year 2018-2020, built from 09/27/2017 through 10/08/2019 equipped with Primaax rear suspension.

 

Resolution

Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis.

1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list.
2. If you are not using Service Management to start repair orders, review DWWC or SIR for “Complete” next to the “20KWA” campaign code prior to performing this repair.
3. Follow the procedures below to install an additional relay valve.

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.

 

Warranty

There is no time or mileage limit for this recall. Kenworth will pay for parts at dealer net plus applicable mark-up and labor:

0.3 hours labor to inspect and confirm the second R12 relay valve is correctly installed, no repair is necessary. Use Quick Claim Code 20KWAA.

3.0 hours labor to install missing second R12 relay valve. Use Quick Claim Code 20KWAB. File a long claim for extraordinary circumstances, which must be explained. A quick claim for standard labor must be filed first.

 

Take-Off Parts Disposition:  N/A

CLAIM CODING
Failure Location:	013-010-008	Work Accomplished:	05
Failure Type:	705	Responsibility Code:	02
SRT Code:	013-904 0.3 hrs. Verify installation of a 2nd R12 relay valve 013-905                                                            3.0 hrs. Installation of a 2nd R12 Relay valve. Cannot be used with 013-904	Claim Type:	C
		Campaign Code	20KWA

 

Parts

Parts are available through PACCAR Parts Direct Ship Program (DSP) unless listed as “Source Locally” in the Part Number column.

Parts are available from PACCAR Parts where noted.

Quantity	Part Number	Description	Availability
1	K295-419Z5515-55LS	Campaign brake air valve	DSP
1	A11-1436	Bracket – ABS Modulator valve	PPD
1	G38-1021-0406	Fitting, male 90deg #4	DSP
1	AP2348	Adapter – Pipe stl plug SQH	DSP
up to 5 ft.	Source Locally	Tubing – Airbrake, orange, 5/8 in. OD
Up to 3 ft.	Source Locally	Tubing – Airbrake, orange, 3/8 in. OD
Up to 16 ft.	Source Locally	Tubing – Airbrake, orange, 3/4 in. OD
1	Source Locally	Bolt – M16 x 50mm
1	Source Locally	16mm self locking nut
1	Source Locally	16mm washer
2	Source Locally	8mm self locking nut
2	Source Locally	8mm washer
1	Source Locally	Loctite 567

 

Procedure

Refer to the attached repair procedure.

 

Attachments

 

 

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1 Affected Product

Vehicle

MAKE	MODEL	YEAR
KENWORTH	T370	2020

 

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9 Associated Documents

ISSUED Owner Notification Letter(Part 577)

RCONL-20V086-5430.pdf 206.826KB

 

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ISSUED Interim Owner Notification Letter(Part 577)

RIONL-20V086-3653.pdf 169.237KB

 

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Recall 573 Report- Amendment 1

RCLRPT-20V086-3729.PDF 213.627KB

 

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Recall Acknowledgement

RCAK-20V086-4715.pdf 245.566KB

 

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Defect Notice 573 Report

RCLRPT-20V086-6750.PDF 212.937KB

 

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Recall Quarterly Report #2, 2020-3

RCLQRT-20V086-1612.PDF 211.229KB

 

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Remedy Instructions and TSB

RCRIT-20V086-3936.pdf 65.529KB

 

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Recall Quarterly Report #3, 2020-4

RCLQRT-20V086-5627.PDF 211.312KB

 

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Recall Quarterly Report #1, 2020-2

RCLQRT-20V086-7686.PDF 211.133KB

 

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Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=20V086&docType=RCL

 

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Last update on 2026-05-31 / Affiliate links / Images from Amazon Product Advertising API

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