FL958 Corroded Modulator Valve May Cause Brake Pull – 2017-2023 Freightliner & 2020-2023 Western Star

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Defect Information Report (Section 573.6) FL-958 Date of Submission: November 1, 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: 2017 Model Yr. End: 2023 Make: Freightliner Model: Cascadia Production Dates: Begin: 03/08/2016 End: 06/18/22 Type: Truck/Tractor Descriptive Information: Only certain Cascadia vehicles equipped with painted modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Number potentially involved: 217,468 Estimated percentage of involve with defect: N/A Defect Description Describe the defect: On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk: A full system pressure applied to one wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Driver’s may get an ABS light prior to complete valve contamination. If applicable, identify the manufacture of the defective or noncompliant component: Braking System Involved Components Component Name: Single ABS Modulator Valve Component Description: Quick Release Pneumatic Valve Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF CV Systems North America LLC 1220 Pacific Dr Auburn Hills, MI, 48326 USA Daryl Sinclair Head of Field Quality and Customer Service Mobile +1 (248) 807 7561 [email protected] Component Manufacturer: ZF CV Systems North America LLC Chronology of Noncompliance Determination Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision. In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. As DTNA moved quickly to determine a recall, some facts remain unknown. DTNA is continuing to investigate the impact of other external braking events, such as Electronic Stability Control (ESC) and Anti-lock Braking System (ABS). Identify the Remedy Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement. Affected vehicles will receive an anodized valve. Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule Describe the recall schedule for notifications: Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 12/30/2022 Planned Dealer Notification End Date: 12/30/2022 Planned Owner Notification Begin Date: 12/30/2022 Planned Owner Notification End Date: 12/30/2022 Manufacture’s identification code for this recall (if applicable): FL-958 DTNA Representative; Sam Geser Product Defect Investigation Engineering Manager

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Amended Defect Information Report (Section 573.6) FL-958 Date of Submission: November 3, 2022 (November 1, 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: 2017 Model Yr. End: 2023 Make: Freightliner, Western Star Model: Cascadia, 49X, 47X, 57X, Business Class M2, 114SD, 108SD Production Dates: Begin: 03/08/2016 End: 06/18/22 Type: Truck/Tractor Descriptive Information: Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Number potentially involved: 218,147 Estimated percentage of involve with defect: 0.1% Defect Description Describe the defect: On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one front wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk: A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Driver’s may get an ABS light prior to complete valve contamination. If applicable, identify the manufacture of the defective or noncompliant component: Braking System Involved Components Component Name: Single ABS Modulator Valve Component Description: Quick Release Pneumatic Valve Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF CV Systems North America LLC 1220 Pacific Dr Auburn Hills, MI, 48326 USA Daryl Sinclair Head of Field Quality and Customer Service Mobile +1 (248) 807 7561 [email protected] Component Manufacturer: ZF CV Systems North America LLC Chronology of Noncompliance Determination Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision. In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. As DTNA moved quickly to determine a recall, some facts remain unknown. DTNA is continuing to investigate the impact of other external braking events, such as Electronic Stability Control (ESC) and Anti-lock Braking System (ABS). DTNA amended the recall population on November 3, 2022, out of an abundance of caution, to include other vehicle models built with the subject steer modulator valves, despite having a different valve mounting style and no knowledge of any field failures. DTNA discovered during the assessment that mounting is an important variable for debris intrusion, but there are other variables that may also play an important role in corrosion. Identify the Remedy Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement. Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule Describe the recall schedule for notifications: Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 12/30/2022 Planned Dealer Notification End Date: 12/30/2022 Planned Owner Notification Begin Date: 12/30/2022 Planned Owner Notification End Date: 12/30/2022 Manufacture’s identification code for this recall (if applicable): FL-958 DTNA Representative; Sam Geser Product Defect Investigation Engineering Manager

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-817 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : NOV 01, 2022 NHTSA Recall No. : 22V-817 Manufacturer Recall No. : FL-958 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 : 217,468 Estimated percentage with defect : NR Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain Cascadia vehicles equipped with painted modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : MAR 08, 2016 – JUN 18, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A full system pressure applied to one wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Description of the Cause : NR Identification of Any Warning that can Occur : Driver’s may get an ABS light prior to complete valve contamination. Involved Components : Part 573 Safety Recall Report 22V-817 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer Name : ZF CV Systems North America LLC Address : 1220 Pacific Dr Auburn Hills Michigan 48326 Country : United States Chronology : In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. (Find full description in the 573 .pdf) Part 573 Safety Recall Report 22V-817 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Affected vehicles will receive an anodized valve. Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Date : DEC 30, 2022 – DEC 30, 2022 Planned Owner Notification Date : DEC 30, 2022 – DEC 30, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-817 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : NOV 03, 2022 NHTSA Recall No. : 22V-817 Manufacturer Recall No. : FL-958 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 : 218,147 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain Cascadia vehicles equipped with painted modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : MAR 08, 2016 – JUN 18, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2020-2023 Western Star 49X Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : AUG 12, 2019 – MAR 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2020-2022 Freightliner Business Class M2 Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : APR 01, 2020 – DEC 01, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-817 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2021-2023 Western Star 47X Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : JUL 14, 2020 – MAR 22, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2021-2022 Western Star 57X Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : AUG 20, 2020 – DEC 20, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2021-2021 Freightliner 108 SD Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : JUN 25, 2020 – JUL 13, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 7 : 2022-2022 Freightliner 114SD Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : NOV 01, 2021 – DEC 01, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-817 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one front wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Description of the Cause : NR Identification of Any Warning that can Occur : Driver’s may get an ABS light prior to complete valve contamination. Involved Components : Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer Name : ZF CV Systems North America LLC Address : 1220 Pacific Dr Auburn Hills Michigan 48326 Country : United States Chronology : In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single Part 573 Safety Recall Report 22V-817 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. To be continued Description of Remedy : Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Date : DEC 30, 2022 – DEC 30, 2022 Planned Owner Notification Date : DEC 30, 2022 – DEC 30, 2022 * NR – Not Reported

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Amended Defect Information Report (Section 573.6) FL-958 Date of Submission: November 9, 2022 (November 1, 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: 2017 Model Yr. End: 2023 Make: Freightliner, Western Star Model: Cascadia, 49X, 47X, 57X, Business Class M2, 114SD Production Dates: Begin: 03/08/2016 End: 06/18/22 Type: Truck/Tractor Descriptive Information: Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Number potentially involved: 219,390 Estimated percentage of involve with defect: 0.1% Defect Description Describe the defect: On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one front wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk: A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Driver’s may get an ABS light prior to complete valve contamination. If applicable, identify the manufacture of the defective or noncompliant component: Braking System Involved Components Component Name: Single ABS Modulator Valve Component Description: Quick Release Pneumatic Valve Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF Group 12001 Tech Center Drive Livonia, MI, 48150 USA Scott Paxton Director, Regulatory Legal Counsel Mobile: 612/227-9864 [email protected] Component Manufacturer: ZF Group Chronology of Noncompliance Determination Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision. In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. As DTNA moved quickly to determine a recall, some facts remain unknown. DTNA is continuing to investigate the impact of other external braking events, such as Electronic Stability Control (ESC) and Anti-lock Braking System (ABS). DTNA amended the recall population on November 3, 2022, out of an abundance of caution, to include other vehicle models built with the subject steer modulator valves, despite having a different valve mounting style and no knowledge of any field failures. DTNA discovered during the assessment that mounting is an important variable for debris intrusion, but there are other variables that may also play an important role in corrosion. The DIR was updated on November 9, 2022 by DTNA to include the most accurate affected population based on the best-known registration domicile location and the best-known supplier identification information. Identify the Remedy Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement. Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule Describe the recall schedule for notifications: Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 12/30/2022 Planned Dealer Notification End Date: 12/30/2022 Planned Owner Notification Begin Date: 12/30/2022 Planned Owner Notification End Date: 12/30/2022 Manufacture’s identification code for this recall (if applicable): FL-958 DTNA Representative; Sam Geser Product Defect Investigation Engineering Manager

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Daimler Truck North America LLC Updated Chronology – September 25, 2023 4883-1814-6175 v.1 001302/00009, 2:59 PM, 09/13/2023 In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. As DTNA moved quickly to determine a recall, some facts remain unknown. DTNA is continuing to investigate the impact of other external braking events, such as Electronic Stability Control (ESC) and Anti-lock Braking System (ABS). DTNA amended the recall population on November 3, 2022, out of an abundance of caution, to include other vehicle models built with the subject steer modulator valves, despite having a different valve mounting style and no knowledge of any field failures. DTNA discovered during the assessment that mounting is an important variable for debris intrusion, but there are other variables that may also play an important role in corrosion. The DIR was updated on November 9, 2022 by DTNA to include the most accurate affected population based on the best-known registration domicile location and the best-known supplier identification information. On September 25, 2023 DTNA updated the description of the remedy campaign to reflect prioritization of repairs for vehicles currently registered in certain states where road salt is regularly used in the winter.

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Frequently Asked Questions (FAQs) 1. Why is Daimler Truck North America (DTNA) issuing this recall (FL-958)? On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected A full system pressure applied to one wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. 2. Which vehicles are included in this recall (FL-958)? Model year 2017-2023 Freightliner New Cascadia vehicles (237,316 vehicles), Model Year 2020-2022 Freightliner Business Class M2s (23 vehicles) , Model Year 2020-2023 Western Star 49X (746 vehicles) , Model Year 2021-2022 Western Star 47X (32 vehicles), Model Year 2021-2022 Western Star 57X (17 vehicles), manufactured by Daimler Truck North America (DTNA) between March 8, 2016 and June 18, 2022 and equipped with Adaptive Cruise Control (ACC) technology and painted modulator valves are included in this recall. 3. How do I determine if a vehicle is included in this recall (FL-958)? As required, DTNA will issue owner notifications on or before 12/30/22 to inform customers about the recall remedy, population, and unreasonable safety risk associated with the issue. Model year 2017-2023 Freightliner New Cascadia vehicles (237,316 vehicles), Model Year 2020-2022 Freightliner Business Class M2s (23 vehicles) , Model Year 2020-2023 Western Star 49X (746 vehicles) , Model Year 2021-2022 Western Star 47X (32 vehicles), Model Year 2021-2022 Western Star 57X (17 vehicles), manufactured by Daimler Truck North America (DTNA) between March 8, 2016 and June 18, 2022 and equipped with Adaptive Cruise Control (ACC) technology and painted modulator valves are included in this recall. Also, vehicles recalled under FL-855 that are equipped with Adaptive Cruise Control (ACC) will require new anodized steer modulator valves and will be covered under FL-958. Repairs will be released in phases based on locations of the vehicle, and repairs will be performed by Daimler Truck North America’s authorized service facilities. 4. Who will pay for repairs? Daimler Truck North America (DTNA) will perform the recall remedy free of charge. 5. How quickly can Daimler Truck North America satisfy the recall campaign? Daimler Truck North America (DTNA) currently has limited stock and is working with its supplier to quickly ramp-up production of additional supply. Repairs will be released in phases based on age and operating locations of the vehicle. 6. Does this recall (FL-958) nullify the previous recall (FL-855)? This recall (FL-958) does not nullify the earlier recall (FL-855) and vehicles subject to both recalls will be reviewed when brought to an authorized service facility for the appropriate remedy or remedies. 7. Why did the previous recall (FL-855) not address the issue described in this recall (FL-958)? In 2020, Daimler Truck North America (DTNA) recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves (described in FL-855). Following two reports of vehicle pull during Adaptive Cruise Control (ACC) operation from a customer with the painted valves in September 2022, DTNA worked with this and other customers to randomly select additional painted valves to inspect. Testing results revealed varying degrees of corrosion build up on the valves installed on trucks and was most present on vehicles primarily operating in aggressive salt belt regions. Thus, DTNA initiated this new recall (FL-958) to replace painted brake modulator valve with anodized valves on the vehicles equipped with ACC 8. When and how will customers be notified of this recall (FL-958)? Customer notification will be made by first class mail using Daimler Truck North America records to determine the customers affected. The start of planned customer and dealer notifications is on or before December 30, 2022. 9. When will customers be able to schedule their repairs? Following notification by Daimler Truck North America (DTNA), customers and authorized service facilities, can coordinate repair schedules. 10. Why is the issue described in this recall (FL-958) present only when vehicles are utilizing Adaptive Cruise Control (ACC)? ACC events are affected based on the best and most recent understanding. DTNA is still investigating potential effects on other vehicles. DTNA is continuing to assess the impact on other export populations that have valves mounted differently than the originally recalled vehicles. 11. Do the brake modulator valves being changed carry a new part number from the previous painted version? Yes, the former, painted front axle brake modulator vales now being substituted for anodized valves carry distinct part numbers for the replacement parts. WAB472 196 025 0 – Unpainted valves were recalled in accordance with FL-855. WAB472 196 037 0 – Painted valves were used as a remedy to address that recall. Cascadia P4s equipped with Adaptive Cruise Control (ACC), the solution for recall FL-855 that is WAB472 196 037 0, will be replaced with WAB472 196 046 0 -Anodized valves as part of FL-958. 12. What supplier provided the affected brake modulator valves? The painted brake modulator valves described in this recall (FL-958) were manufactured by ZF CV Systems North America LLC and installed on Model year 2017-2023 Freightliner New Cascadia vehicles (237,316 vehicles), Model Year 2020-2022 Freightliner Business Class M2s (23 vehicles) , Model Year 2020-2023 Western Star 49X (746 vehicles) , Model Year 2021-2022 Western Star 47X (32 vehicles), Model Year 2021-2022 Western Star 57X (17 vehicles), manufactured by Daimler Truck North America (DTNA) between March 8, 2016 and June 18, 2022 13. Do my vehicles need to be parked until repairs are completed? Daimler Truck North America (DTNA) has not issued a do not drive order associated with this recall (FL-958) as regular service brakes are unaffected and the reported incidence rate of brake pull is extremely low. 14. What is the expected financial impact to DTNA for completing this (FL-958) recall campaign? Daimler Truck North America (DTNA) won’t disclose the financial impact of this (FL-958) or any other recall. DTNA remains focused on ensuring this (FL-958) and all other recall campaigns are conducted quickly and completely so that its customers are able to continue their valuable contribution to the critical infrastructure of the nation. 15. To whom do I direct inquiries I received from a member of the media / press? Inquiries from members of the media can be directed to the DTNA Corporate Communications team: [email protected] or [email protected]

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Daimler Truck North America LLC IMPORTANT SAFETY RECALL This notice applies to your vehicle(s), See enclosed VIN list December 2022 FL958 Interim Recall Notice NHTSA #22V-817 Subject: Brake Modulator Valves This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect which relates to motor vehicle safety exists on certain model years 2017-2023 Freightliner 114SD, Business Class M2, and Cascadia; and Western Star 47X, 49X, and 57X vehicles manufactured March 3, 2016, through June 18, 2022. The single brake modulator valve may corrode, which during an Adaptive Cruise Control (ACC) braking event, could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. This is the first of two notices you will receive regarding this subject. This letter is to inform you of an upcoming Recall to correct the issue noted above. Daimler Truck is currently securing replacement parts. There is no action for you to take at this time. The second notice will inform you when the final free remedy is available. When you receive the second notice, please contact your authorized Daimler Truck North America dealer to schedule the Recall for your vehicle. If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days. If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address [email protected]. For other concerns, you may contact the Customer Assistance Center at (800) 385-4357. If you are not able to have the defect remedied without charge and within a reasonable time, you may wish to submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590; or call the Vehicle Safety Hotline at (888) 327-4236 (TTY: 800-424-9153); or go to http://www.nhtsa.gov. We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety. WARRANTY CAMPAIGNS DEPARTMENT Enclosure Daimler Truck North America LLC Warranty Campaigns Department P.O. Box 4090 Portland, OR 97208-4090 800.547.0712 Phone

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The information contained in this letter supercedes and supplements any related policies and procedures in any previously released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not exempt addressees from compliance with the information contained herein. Page 1 of 1 Daimler Truck North America LLC REF #: ICI22-051 Effective: 12/21/22 Release: 12/21/22 SUBJECT: FL958 – Interim Recall Notice This letter is to inform you that an interim recall notice is being sent to affected customers for recall FL958 ~ Brake Modulator Valves. The interim notices will be mailed on 12/23/2022. A copy (with French translation) follows for your reference. This notice is for your information only. There is no action for customers or dealers to take. If customers inquire, please refer them to the interim notice. If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry through the WSC Link on DTNAPortal. REF #: ICI22-051 En vigueur: 21/12/22 Date de sortie: 21/12/22 OBJET: FL958 – Avis de rappel provisoire Cette lettre a pour but de vous informer qu’un avis de rappel provisoire est envoyé aux clients concernés pour le rappel FL958 ~ Vannes modulatrices de freinage. les avis provisoires seront postés 23/12/2022. Une copie (avec traduction française) suit pour votre référence. Cet avis est pour votre information seulement. Les clients ou les revendeurs n’ont aucune action à entreprendre. Si les clients demandent, veuillez les renvoyer à l’avis intermédiaire. Si vous avez des questions ou avez besoin de plus amples renseignements, communiquez avec le Service des campagnes de garantie en soumettant une demande via le lien WSC sur DTNAPortal. WARRANTY CAMPAIGNS DEPARTMENT P.O. Box 4090 800-547-0712 Portland, Oregon 97208-4090 ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager Freightliner Dealers – U.S. and Canada Western Star and Sterling Dealers – U.S. and Canada FCCC Dealers – U.S. and Canada Direct Warranty Customers – U.S. and Canada Export Distributors If you have questions about this Letter, please submit your inquiry on the Web using the WSC Link on DTNAConnect Daimler Truck North America LLC IMPORTANT SAFETY RECALL This notice applies to your vehicle(s), See enclosed VIN list December 2022 FL958 Interim Recall Notice NHTSA #22V-817 Subject: Brake Modulator Valves This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect which relates to motor vehicle safety exists on certain model years 2017-2023 Freightliner 114SD, Business Class M2, and Cascadia; and Western Star 47X, 49X, and 57X vehicles manufactured March 3, 2016, through June 18, 2022. The single brake modulator valve may corrode, which during an Adaptive Cruise Control (ACC) braking event, could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. This is the first of two notices you will receive regarding this subject. This letter is to inform you of an upcoming Recall to correct the issue noted above. Daimler Truck is currently securing replacement parts. There is no action for you to take at this time. The second notice will inform you when the final free remedy is available. When you receive the second notice, please contact your authorized Daimler Truck North America dealer to schedule the Recall for your vehicle. If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days. If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address [email protected]. For other concerns, you may contact the Customer Assistance Center at (800) 385-4357. If you are not able to have the defect remedied without charge and within a reasonable time, you may wish to submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590; or call the Vehicle Safety Hotline at (888) 327-4236 (TTY: 800-424-9153); or go to http://www.nhtsa.gov. We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety. WARRANTY CAMPAIGNS DEPARTMENT Enclosure Daimler Truck North America LLC Warranty Campaigns Department P.O. Box 4090 Portland, OR 97208-4090 800.547.0712 Phone Daimler Truck North America LLC December 2022 FL958 Interim Recall Notice Transport Canada #2022-626 Subject: Brake Modulator Valves 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. Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect which relates to motor vehicle safety exists on specific model years 2017-2023 Freightliner 108SD, 114SD, Business Class M2, and Cascadia; and Western Star 47X, 48X, 49X, and 57X vehicles manufactured March 3, 2016, through June 18, 2022. The single brake modulator valve may corrode, which during an Adaptive Cruise Control (ACC) braking event, could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. This is the first of two notices you will receive regarding this subject. This letter is to inform you of an upcoming Recall to correct the issue noted above. Daimler Truck is currently securing replacement parts. There is no action for you to take at this time. The second notice will inform you when the final free remedy is available. When you receive the second notice, please contact your authorized Daimler Truck North America dealer to schedule the Recall for your vehicle. If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days. If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address [email protected]. For other concerns, you may contact the Customer Assistance Center at (800) 385-4357. If you have a safety concern relating to this Recall, you may wish to contact Transport Canada – Motor Vehicle Safety at, 80 rue Noel, Gatineau, Quebec J8Z 0A1 or phone (800) 333-0510. We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety. WARRANTY CAMPAIGNS DEPARTMENT Enclosure Daimler Truck North America LLC Warranty Campaigns Department P.O. Box 4090 Portland, OR 97208-4090 800.547.0712 Phone Daimler Truck North America LLC décembre 2022 FL958 Avis provisoire de rappel Transports Canada #2022-626 Objet: Valves de modulateur de frein 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. Daimler Truck North America LLC (DTNA), au nom de sa Freightliner Trucks Division et de sa filiale à part entière, Western Star Truck Sales, Inc., a décidé qu’il existe un défaut relatif à la sécurité des véhicules automobiles pour les années de modèle spécifiques 2017-2023 Freightliner 108SD, 114SD, Business Class M2 et Cascadia; et les véhicules Western Star 47X, 48X, 49X et 57X fabriqués du 3 mars 2016 au 18 juin 2022. La soupape du modulateur de frein unique peut se corroder, ce qui, lors d’un freinage avec le régulateur de vitesse adaptatif (ACC), pourrait entraîner une traction des freins, ce qui pourrait entraîner un changement soudain de direction du véhicule en raison d’un freinage inégal sur l’essieu avant, ce qui augmente le risque d’accident d’un véhicule à moteur. Il s’agit du premier de deux avis que vous recevrez à ce sujet. La présente vise à vous informer d’un rappel à venir pour corriger le problème susmentionné. Daimler Truck sécurise actuellement les pièces de rechange. Il n’y a aucune mesure à prendre pour le moment. Le deuxième avis vous informera lorsque le dernier recours gratuit sera disponible. Lorsque vous recevez le deuxième avis, veuillez communiquer avec votre concessionnaire autorisé Daimler Truck North America pour planifier le rappel de votre véhicule. Si vous n’êtes pas propriétaire du véhicule qui correspond au (x) numéro (s) d’identification figurant sur l’avis de rappel, veuillez retourner l’avis au Service des campagnes de garantie avec tout renseignement que vous pouvez fournir nous aidera à trouver le propriétaire actuel. Si vous avez loué ce véhicule, la loi fédérale exige que vous transmettiez cet avis à : le locataire dans un délai de 10 jours. Si vous êtes un fabricant subséquent, la loi fédérale exige que vous transmettiez ce formulaire un avis à vos distributeurs et points de vente au détail dans un délai de cinq jours ouvrables. Si vous avez des questions au sujet de ce rappel, veuillez communiquer avec le Service des campagnes de garantie au (800) 547-0712, de 7 h à 16 h, Pacific Time, Monday à Friday, adresse courriel [email protected]. Pour toute autre question, vous pouvez communiquer avec le Centre d’assistance à la clientèle au (800) 385-4357. Si vous avez des préoccupations en matière de sécurité relativement à ce rappel, vous pouvez communiquer avec Transports Canada — Sécurité des véhicules automobiles au 80, rue Noel, Gatineau (Québec) J8Z 0A1 ou téléphoner au (800) 333-0510. Nous regrettons tout inconvénient que cette mesure pourrait causer, mais nous sommes certains que vous comprenez notre intérêt pour la sécurité des véhicules automobiles. SERVICE DES CAMPAGNES DE GARANTIE Enceinte Daimler Truck North America LLC Service des campagnes de garantie C.P. 4090 Portland, OR 97208-4090 8005470712 Téléphone

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-817 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : NOV 09, 2022 NHTSA Recall No. : 22V-817 Manufacturer Recall No. : FL-958 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 : 219,390 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2020-2023 Western Star 49X Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : AUG 12, 2019 – MAR 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2020-2022 Freightliner Business Class M2 Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : APR 01, 2020 – DEC 01, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2021-2023 Western Star 47X Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : JUL 14, 2020 – MAR 22, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-817 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2021-2022 Western Star 57X Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : AUG 20, 2020 – DEC 20, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2022-2022 Freightliner 114SD Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : NOV 01, 2021 – DEC 01, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2017-2023 Freightliner Cascadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : MAY 03, 2016 – JUN 18, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one front wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Description of the Cause : NR Part 573 Safety Recall Report 22V-817 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : Driver’s may get an ABS light prior to complete valve contamination. Involved Components : Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer Name : ZF Group Address : 12001 Tech Center Drive Livonia Michigan 48150 Country : United States Chronology : In 2020, DTNA recalled unpainted brake modulator valves due to possible corrosion and implemented a remedy of painted valves. On September 14, 2022, DTNA received two reports of vehicle pull during an Adaptive Cruise Control (ACC) event from a single isolated customer with the painted valves. The first report mentioned about two cases of unintended brake pull to the left side, while the second mentioned one case of unintended brake pull to the right side. The dealer was able to isolate the failure to the painted steer single modulator valve after repairing the vehicle. The reports all center around vehicles from one limited geographic area. In or around that time, DTNA promptly opened an investigation to determine the scope of the issue. Additionally, DTNA promptly analyzed the failed parts and found debris associated with corrosion. Around the same time, DTNA conducted a warranty seek and was unable to find claims alleging brake pull events caused by subject valve corrosion. However, as part of its due diligence, DTNA worked with customers in various locations starting in early October 2022 to randomly select parts to inspect. 36 valves were returned from various parts of the east salt belt region in Canada and the United States and shipped to the supplier for further evaluation. Corrosion testing results on 5 trucks (2 different customers) found through late October 2022 revealed varying degrees of corrosion build up on the valves installed on trucks operating in the aggressive salt belt region of South East Canada (Quebec). Around the same time, DTNA received corrosion testing results on valves installed on trucks based in the US’s aggressive salt belt region (Maine and New York), and there was some level of corrosion found. On or about late October and early November, DTNA decided to recall in Canada where corrosion was first observed and then in the US where less severe corrosion was later found. Part 573 Safety Recall Report 22V-817 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 To be continued Description of Remedy : Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Date : DEC 30, 2022 – DEC 30, 2022 Planned Owner Notification Date : DEC 30, 2022 – DEC 30, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-817 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : SEP 25, 2023 NHTSA Recall No. : 22V-817 Manufacturer Recall No. : FL-958 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 : 219,390 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2022-2022 Freightliner Business Class M2 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : NOV 01, 2021 – NOV 10, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2021-2023 Western Star 49X Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : FEB 02, 2020 – MAR 26, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : NOV 09, 2021 – DEC 17, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-817 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2022-2023 Western Star 47X Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : MAY 19, 2021 – MAR 22, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2022-2022 Western Star 57X Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : NOV 03, 2021 – DEC 20, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : MAY 03, 2016 – JUN 18, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 7 : 2019-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : GAS Descriptive Information : Only certain vehicles equipped with painted front axle modulator valves and Adaptive Cruise Control (ACC) technology are included in this recall. Production Dates : MAR 12, 2018 – MAR 31, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-817 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an Adaptive Cruise Control (ACC) braking event may result in full system pressure applied to one front wheel end causing brake pull from differential in brake force. Regular service brakes are unaffected. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Description of the Cause : Plastic enclosure and aluminum body allowed corrosion to occur. Identification of Any Warning that can Occur : Driver’s may get an ABS light prior to complete valve contamination. Involved Components : Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer Name : ZF Group Address : 12001 Tech Center Drive Livonia Michigan 48150 Country : United States Chronology : Refer attachment. Part 573 Safety Recall Report 22V-817 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Affected vehicles will be inspected and have brake modulator valves replaced, as required. Repairs will be released in phases and prioritized based on geographic location, starting with vehicles currently registered in certain states where road salt is regularly used in the winter (CT, ME, MI, MN, NH, NY, PA, RI, VT). Repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. 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. Owners are directed to seek reimbursement through authorized dealer. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Date : DEC 30, 2022 – DEC 30, 2022 Planned Owner Notification Date : DEC 30, 2022 – DEC 30, 2022 * NR – Not Reported

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