FL936 – Double Check Valve May Trap Air and Impair Braking – 2022 Freightliner Cascadia

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Defect Information Report (Section 573.6) FL-936 Date of Submission: May 25, 2022 Manufacturer: Daimler Truck North America LLC P.O. BOX 3849 Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2022 Model Yr. End: 2022 Make: Freightliner Model: Cascadia Production Dates: Begin: 11/16/2021 End: 12/17/2021 Type: Truck/Tractor Descriptive Information: Specific limited production vehicles that are equipped with a double check valve for towing or decking purposes. Number potentially involved: 4 Estimated percentage of involve with defect: 100% Defect Description For Defect: Describe the defect: On a specific DTNA-owned truck used for testing purposes, the double check valve was found to be trapping air in the backup pneumatic air circuit under rare situations. Trapped air may cause unintended or prolonged service brake application, which may result in rear axle to lock while the vehicle is in motion. Out of an abundance of caution, DTNA is recalling the limited population of vehicles built to date with the same, unique valve configuration. If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk: Rear axle locking up while the vehicle is in motion may result in generation of additional frictional force, which may cause the brake components to fail prematurely due to over time heat buildup. In rare cases, especially if the axle lock up is ignored by the driver, may increase the vehicle stopping distance, increasing the risk of a crash. As of today, DTNA is not aware of any incidents due to this defect, Identify any warning, which can precede or occur: Brakes dragging, vibration and smelly brake components. If applicable, identify the manufacture of the defective or noncompliant component: Service Brake System. Involved Components Component Name: Double Check Valve- Towing and Decking Component Description: Pneumatic Valve Component Part Number: BW 278614 Supplier Identification: N/A Component Manufacturer: N/A Chronology of Noncompliance Determination Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision. On or about May 5, 2022, DTNA received a notification from its Engineering group that, while testing a specific DTNA owned vehicle that had not been sold to commerce, there was a situation that resulted in an unintended brake application. At that time, DTNA believed the issue to be an isolated occurrence on only one vehicle with unknown cause and unknown population. DTNA promptly began an investigation into that vehicle and other vehicles like it, which were produced in only a very limited production run. On or about May 16, DTNA determined that the occurrence could occur on the full population listed above on this 573 report. On or about May 18, 2022, after DTNA verified the limited population of vehicles potentially subject to the defect to the extent necessary to declare a recall and file a 573 report, out of abundance of caution, DTNA decided to conduct a voluntary safety recall campaign for this very specific group of vehicles to remove the double check valve from the backup pneumatic circuit. As of today, DTNA is not aware of any incidents due to this defect. Identify the Remedy Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement. On the affected vehicles, the subject double check valve will be removed from the towing pneumatic circuit vehicles. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. The owners are directed to seek reimbursement through authorized dealers. Identify the Recall Schedule Describe the recall schedule for notifications: Customer notification will be made by first class mail using Daimler Truck North America records to determine the customer affected. Planned Dealer Notification Begin Date: 07/23/2022 Planned Dealer Notification End Date: 07/23/2022 Planned Owner Notification Begin Date: 07/23/2022 Planned Owner Notification End Date: 07/23/2022 Manufacture’s identification code for this recall (if applicable): FL-936 DTNA Representative; Tiffani Torgeson Manager, Compliance and Regulatory Affairs

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Amended Defect Information Report (Section 573.6) FL-936 Date of Submission: May 25, 2022 (Amendment June 3, 2022) Manufacturer: Daimler Truck North America LLC P.O. BOX 3849 Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2022 Model Yr. End: 2022 Make: Freightliner Model: Cascadia Production Dates: Begin: 11/16/2021 End: 12/17/2021 Type: Truck/Tractor Descriptive Information: Specific limited production vehicles that are equipped with a double check valve for towing or decking purposes. Number potentially involved: 0 Estimated percentage of involve with defect: 0% Defect Description For Defect: Describe the defect: On a specific DTNA-owned truck used for testing purposes, the double check valve was found to be trapping air in the backup pneumatic air circuit under rare situations. Trapped air may cause unintended or prolonged service brake application, which may result in rear axle to lock while the vehicle is in motion. Out of an abundance of caution, DTNA is recalling the limited population of vehicles built to date with the same, unique valve configuration. Note as of June 3, 2022: DTNA has removed the particular double check valve from all affected vehicles, thereby eliminating the known defect. If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk: Rear axle locking up while the vehicle is in motion may result in generation of additional frictional force, which may cause the brake components to fail prematurely due to over time heat buildup. In rare cases, especially if the axle lock up is ignored by the driver, may increase the vehicle stopping distance, increasing the risk of a crash. As of today, DTNA is not aware of any incidents due to this defect. Note as of June 3, 2022: DTNA has removed the particular double check valve from all affected vehicles, thereby eliminating the known safety risk. Identify any warning, which can precede or occur: Brakes dragging, vibration and smelly brake components. If applicable, identify the manufacture of the defective or noncompliant component: Service Brake System. Involved Components Component Name: Double Check Valve- Towing and Decking Component Description: Pneumatic Valve Component Part Number: BW 278614 Supplier Identification: Bendix Corp Heavy Vehicle Systems Group 100 Jessica ln Del Rio, Tx 78840-8527 David Scuito Account Manager david.scuito@bendix.com 503-504-3248 Component Manufacturer: Bendix Chronology of Noncompliance Determination Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision. On or about May 5, 2022, DTNA received a notification from its Engineering group that, while testing a specific DTNA owned vehicle that had not been sold to commerce, there was a situation that resulted in an unintended brake application. At that time, DTNA believed the issue to be an isolated occurrence on only one vehicle with unknown cause and unknown population. DTNA promptly began an investigation into that vehicle and other vehicles like it, which were produced in only a very limited production run. On or about May 16, DTNA determined that the occurrence could occur on a population of 4 vehicles, as listed on the prior 573 report. On or about May 18, 2022, after DTNA verified the limited population of vehicles potentially subject to the defect to the extent necessary to declare a recall and file that 573 report, out of abundance of caution, DTNA decided to conduct a voluntary safety recall campaign for this very specific group of vehicles to remove the double check valve from the backup pneumatic circuit. As of today, DTNA is not aware of any incidents due to this defect. June 3, 2022, DTNA captured and repaired the 4 vehicles at DTNA’s own expense. Identify the Remedy Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement. No more vehicles remain in the population so an owner notification no longer remains necessary. Daimler Truck North America captured and repaired the vehicles at DTNA’s own expense. Identify the Recall Schedule Describe the recall schedule for notifications: No more vehicles remain in the population so an owner notification no longer remains necessary. Planned Dealer Notification Begin Date: N/A Planned Dealer Notification End Date: N/A Planned Owner Notification Begin Date: N/A Planned Owner Notification End Date: N/A Manufacture’s identification code for this recall (if applicable): FL-936 DTNA Representative; Tiffani Torgeson Manager, Compliance and Regulatory Affairs

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Daimler Trucks North America, LLC 4747 N. Channel Avenue Portland OR 97217-7699 Phone: 503-745-8000 July 20, 2022 Michelle Rice Recall Analyst Department of Transportation National Highway Traffic Safety Administration 1200 New Jersey Avenue SE., Washington, DC 20590 Office: 202-366-1060 Subject: Freightliner AP4 Rear Brake Chamber Air Release NHTSA NS No. 22V-374 Manufacturer number: FL-936 Ms. Rice, There will be no publications for safety recall 22V-374. All vehicles within this recall campaign have been repaired prior to the publication of a Dealer’s Bulletin or Owner Notification. All impacted serial numbers were inspected/repaired on 6/13/2022. Please contact me if you have any questions. Sincerely, Sam Geser Product Defect Investigation Engineering manager Compliance and Regulatory Affairs Daimler Trucks North America Sam Geser Product Defect Investigation Engineering Manager Compliance and Regulatory Affairs

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-374 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : MAY 25, 2022 NHTSA Recall No. : 22V-374 Manufacturer Recall No. : FL-936 Manufacturer Information : Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue Portland OR 97217-3849 Company phone : 800-745-8000 Population : Number of potentially involved : 4 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Freightliner Cascadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Specific limited production vehicles that are equipped with a double check valve for towing or decking purposes. Production Dates : NOV 16, 2021 – DEC 17, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : On a specific DTNA-owned truck used for testing purposes, the double check valve was found to be trapping air in the backup pneumatic air circuit under rare situations. Trapped air may cause unintended or prolonged service brake application, which may result in rear axle to lock while the vehicle is in motion. Out of an abundance of caution, DTNA is recalling the limited population of vehicles built to date with the same, unique valve configuration. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Rear axle locking up while the vehicle is in motion may result in generation of additional frictional force, which may cause the brake components to fail prematurely due to over time heat buildup. In rare cases, especially if the axle lock up is ignored by the driver, may increase the vehicle stopping distance, increasing the risk of a crash. As of today, DTNA is not aware of any incidents due to this defect. Description of the Cause : NR Identification of Any Warning that can Occur : NR Part 573 Safety Recall Report 22V-374 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Double Check Valve Component Description : Pneumatic Valve Component Part Number : BW 278614 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : On or about May 5, 2022, DTNA received a notification from its Engineering group that, while testing a specific DTNA owned vehicle that had not been sold to commerce, there was a situation that resulted in an unintended brake application. At that time, DTNA believed the issue to be an isolated occurrence on only one vehicle with unknown cause and unknown population. DTNA promptly began an investigation into that vehicle and other vehicles like it, which were produced in only a very limited production run. On or about May 16, DTNA determined that the occurrence could occur on the full population listed above on this 573 report. On or about May 18, 2022, after DTNA verified the limited population of vehicles potentially subject to the defect to the extent necessary to declare a recall and file a 573 report, out of abundance of caution, DTNA decided to conduct a voluntary safety recall campaign for this very specific group of vehicles to remove the double check valve from the backup pneumatic circuit. As of today, DTNA is not aware of any incidents due to this defect. Description of Remedy : Description of Remedy Program : On the affected vehicles, the subject double check valve will be removed from the towing pneumatic circuit vehicles. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. The owners are directed to seek reimbursement through authorized dealers. Part 573 Safety Recall Report 22V-374 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : NR Planned Dealer Notification Date : JUL 23, 2022 – JUL 23, 2022 Planned Owner Notification Date : JUL 23, 2022 – JUL 23, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-374 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : MAY 25, 2022 NHTSA Recall No. : 22V-374 Manufacturer Recall No. : FL-936 Manufacturer Information : Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue Portland OR 97217-3849 Company phone : 800-745-8000 Population : Number of potentially involved : 4 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Freightliner Cascadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Specific limited production vehicles that are equipped with a double check valve for towing or decking purposes. Production Dates : NOV 16, 2021 – DEC 17, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : On a specific DTNA-owned truck used for testing purposes, the double check valve was found to be trapping air in the backup pneumatic air circuit under rare situations. Trapped air may cause unintended or prolonged service brake application, which may result in rear axle to lock while the vehicle is in motion. Out of an abundance of caution, DTNA is recalling the limited population of vehicles built to date with the same, unique valve configuration. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Rear axle locking up while the vehicle is in motion may result in generation of additional frictional force, which may cause the brake components to fail prematurely due to over time heat buildup. In rare cases, especially if the axle lock up is ignored by the driver, may increase the vehicle stopping distance, increasing the risk of a crash. As of today, DTNA is not aware of any incidents due to this defect. Description of the Cause : NR Identification of Any Warning that can Occur : NR Part 573 Safety Recall Report 22V-374 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Double Check Valve Component Description : Pneumatic Valve Component Part Number : BW 278614 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : On or about May 5, 2022, DTNA received a notification from its Engineering group that, while testing a specific DTNA owned vehicle that had not been sold to commerce, there was a situation that resulted in an unintended brake application. At that time, DTNA believed the issue to be an isolated occurrence on only one vehicle with unknown cause and unknown population. DTNA promptly began an investigation into that vehicle and other vehicles like it, which were produced in only a very limited production run. On or about May 16, DTNA determined that the occurrence could occur on the full population listed above on this 573 report. On or about May 18, 2022, after DTNA verified the limited population of vehicles potentially subject to the defect to the extent necessary to declare a recall and file a 573 report, out of abundance of caution, DTNA decided to conduct a voluntary safety recall campaign for this very specific group of vehicles to remove the double check valve from the backup pneumatic circuit. As of today, DTNA is not aware of any incidents due to this defect. Description of Remedy : Description of Remedy Program : On the affected vehicles, the subject double check valve will be removed from the towing pneumatic circuit vehicles. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. The owners are directed to seek reimbursement through authorized dealers. Part 573 Safety Recall Report 22V-374 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : NR Planned Dealer Notification Date : JUL 23, 2022 – JUL 23, 2022 Planned Owner Notification Date : JUL 23, 2022 – JUL 23, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-374 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : JUN 03, 2022 NHTSA Recall No. : 22V-374 Manufacturer Recall No. : FL-936 Manufacturer Information : Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue Portland OR 97217-3849 Company phone : 800-745-8000 Population : Number of potentially involved : 4 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Freightliner Cascadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Specific limited production vehicles that are equipped with a double check valve for towing or decking purposes. Production Dates : NOV 16, 2021 – DEC 17, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : On a specific DTNA-owned truck used for testing purposes, the double check valve was found to be trapping air in the backup pneumatic air circuit under rare situations. Trapped air may cause unintended or prolonged service brake application, which may result in rear axle to lock while the vehicle is in motion. Out of an abundance of caution, DTNA is recalling the limited population of vehicles built to date with the same, unique valve configuration. Note as of June 3, 2022: DTNA has removed the particular double check valve from all affected vehicles, thereby eliminating the known defect. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Rear axle locking up while the vehicle is in motion may result in generation of additional frictional force, which may cause the brake components to fail prematurely due to over time heat buildup. In rare cases, especially if the axle lock up is ignored by the driver, may increase the vehicle stopping distance, increasing the risk of a crash. As of today, DTNA is not aware of any incidents due to this defect. Note as of June 3, 2022: DTNA has removed the particular double check valve from all affected vehicles, thereby eliminating the known Part 573 Safety Recall Report 22V-374 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 safety risk. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : Double Check Valve Component Description : Pneumatic Valve Component Part Number : BW 278614 Supplier Identification : Component Manufacturer Name : Bendix Corp Heavy Vehicle Systems Group Address : 100 Jessica ln Del Rio Texas 78840-8527 Country : United States Chronology : On or about May 5, 2022, DTNA received a notification from its Engineering group that, while testing a specific DTNA owned vehicle that had not been sold to commerce, there was a situation that resulted in an unintended brake application. At that time, DTNA believed the issue to be an isolated occurrence on only one vehicle with unknown cause and unknown population. DTNA promptly began an investigation into that vehicle and other vehicles like it, which were produced in only a very limited production run. On or about May 16, DTNA determined that the occurrence could occur on a population of 4 vehicles, as listed on the prior 573 report. On or about May 18, 2022, after DTNA verified the limited population of vehicles potentially subject to the defect to the extent necessary to declare a recall and file that 573 report, out of abundance of caution, DTNA decided to conduct a voluntary safety recall campaign for this very specific group of vehicles to remove the double check valve from the backup pneumatic circuit. As of today, DTNA is not aware of any incidents due to this defect. June 3, 2022, DTNA captured and repaired the 4 vehicles at DTNA’s own expense. Part 573 Safety Recall Report 22V-374 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : No more vehicles remain in the population so an owner notification no longer remains necessary. Daimler Truck North America captured and repaired the vehicles at DTNA’s own expense. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : No more vehicles remain in the population so an owner notification no longer remains necessary. Planned Dealer Notification Date : JUL 23, 2022 – JUL 23, 2022 Planned Owner Notification Date : JUL 23, 2022 – JUL 23, 2022 * NR – Not Reported

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