23E054 – Insufficiently Tightened Bolt – Cummins B6.7 Diesel Engines

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23E-054 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Cummins, Inc. Submission Date : JUL 18, 2023 NHTSA Recall No. : 23E-054 Manufacturer Recall No. : C2716 Manufacturer Information : Manufacturer Name : Cummins, Inc. Address : Box 3005 Mail Code COB118 Columbus IN 47202-3005 Company phone : 812-377-5000 Population : Number of potentially involved : 59 Estimated percentage with defect : 45 % Equipment Information : Brand / Trade 1 : Cummins Inc Model : B6.7 Part No. : D313038BX03 Size : N/A Function : Diesel Engine Descriptive Information : This recall covers certain Cummins B6.7 engines that are equipped with lifting bracket Option Number LA9181 and were built during the identified product date range and sold exclusively to Navistar for installation in trucks and buses. The production “Begin” and “End” dates provided herein are based on the dates list on the affected engines’ dataplates (the engine “build date”.) Production Dates : MAR 20, 2023 – MAR 30, 2023 Description of Defect : Description of the Defect : The subject engines may have been built with an insufficiently torqued (or loose) bolt attaching the rear lifting bracket to the cylinder head. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The rear lifting bracket may detach from the cylinder head while the engine is being lifted, possibly causing the engine to swing or fall, potentially resulting in personal injury. Description of the Cause : The lower bolt that attaches the rear lifting bracket to the cylinder head may not have been properly torqued due to assembly operator error. Part 573 Safety Recall Report 23E-054 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : None. Involved Components : Component Name : Bracket, Engine Lifting Component Description : Rear Lifting Bracket Component Part Number : 4933232 Component Name : Screw, Hex Flange Head Component Description : Lower Bolt Component Part Number : 3903990 Supplier Identification : Component Manufacturer Name : N/A Address : NR NR Country : NR Chronology : 04/06/2023 – Navistar reported to Cummins that an engine had a bracket separation on their production line due to a loose bolt attaching the rear lifting bracket to the cylinder head. 04/13/2023 – Another OEM reported to Cummins that two engines had bracket separations on their production line due to a loose bolt attaching the rear lifting bracket to the cylinder head. As a result, Cummins inspected and, as necessary, repaired all the engines at that OEM. Because of this action, no engines shipped to this OEM are subject to this recall. Cummins implemented assembly process and operator training improvements at the lifting bracket assembly station. 06/09/2023 – Cummins conducted a Product Safety Hazard Analysis to evaluate the potential safety risk on Part 573 Safety Recall Report 23E-054 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 fielded units. As part of this analysis, Cummins conducted a warranty search and found no claims for this issue. 06/09/2023 – 07/11/2023 – Cummins escalated the issue through its Product Safety Defect Determination Process. 7/11/2023 – Based upon the results of the investigation, and although Cummins has no reports that defective units have been shipped beyond the OEM assembly plants, the Cummins Product Safety Defect Board decided out of an abundance of caution to conduct a safety campaign to address this condition. To date, there have been no reports of injuries related to this issue. Description of Remedy : Description of Remedy Program : The remedy is to inspect the rear lifting bracket bolts, rear lifting bracket, fuel lines and cylinder head for damage. If any bolt is observed loose or insufficiently torqued, the bracket and both bolts will be replaced. Fuel lines or cylinders heads found damaged will also be replaced. Cummins requests that it be exempt from providing notification of a reimbursement plan. Any pre-notification product failure would have been corrected under the manufacturer’s limited warranty. Accordingly, no person would be eligible for reimbursement pursuant to 573.13. How Remedy Component Differs from Recalled Component : The remedy components are the same as the recalled components because the issue is an assembly error. Identify How/When Recall Condition was Corrected in Production : Assembly process and operator training improvements at the lifting bracket assembly station were implemented on 4/13/2023. Recall Schedule : Description of Recall Schedule : Cummins expects to notify Navistar, the only affected OEM, by 07/28/2023. Subject to consultation and agreement with Navistar, Cummins will conduct the recall, including sending owner notifications. The timing of owner notification will be determined in consultation with Navistar. The notification and remedy schedule is still being developed, and Cummins will revise the “planned notification” dates when a more precise schedule is known. In any event, Cummins expects to notify owners no later than 9/15/2023, pending availability of owner addresses from Navistar. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : SEP 15, 2023 – SEP 15, 2023 Part 573 Safety Recall Report 23E-054 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Purchaser Information : The following manufacturers purchased this defective/noncompliant equipment for possible use or installation in new motor vehicles or new items of motor vehicle equipment: Name : Navistar International Address : 2701 Navistar Dr Lisle IL 60532 Country : US Company Phone : 2606155684 * NR – Not Reported

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*** IMPORTANT SAFETY RECALL *** NHTSA Recall No. (23E-054) Cummins Campaign No. C2716 July 21, 2023 Dear Cummins OEM Customer: We are writing to inform you that Cummins Inc. has determined that a safety-related defect exists in certain Cummins B6.7 engines that are equipped with lifting bracket Option Number LA9181that were manufactured between March 20, 2023 and March 30, 2023. Cummins has initiated a recall of the subject B6.7 engines. Our records indicate that some of these engines were shipped to you. A copy of Cummins’ initial Part 573 Defect Notification report is enclosed. This notification was submitted to the National Highway Traffic Safety Administration (NHTSA) on July 18, 2023. As more fully described in the Defect Notification, the subject engines may have been built with an insufficiently torqued (or loose) bolt attaching the rear lifting bracket to the cylinder head bracket that may detach from the cylinder head while the engine is being lifted, possibly causing the engine to swing or fall, potentially resulting in personal injury. Enclosed is a list of serial numbers for affected engines that our records indicate were shipped to your plants. For engines that have left your control, we encourage you to make a safety defect determination in accordance with 49 USC 30118 et seq. and, as appropriate, to submit a Defect Notification to NHTSA in accordance with 49 CFR Part 573. Cummins will conduct the recall, including notifying owners pursuant to 49 CFR Part 577, performing the remedy, and submitting quarterly status reports to NHTSA. Cummins is requesting that you provide the associated VINs and owner contact information to facilitate owner notification. Please work with your Cummins account team leader to ensure that the requested information is provided to Cummins as soon as possible. As an equipment manufacturer, Cummins has no obligation to file a defect notification to Transport Canada for this recall. If an OEM has an obligation to report the defect to Transport Canada, we ask that you please provide the Transport Canada recall number for your vehicle recall to Cummins. Cummins cannot mail owner letters compliant with Transport Canada regulations without the recall number assigned by Transport Canada. Cummins will provide information to the OEM after mailings are completed so that the OEM can submit the required reports to Transport Canada. Please note that Federal law prohibits delivery of these engines, or vehicles equipped with these engines, under a sale or lease until this condition has been remedied. Cummins is finalizing the plan to make a field service safety campaign available to address this condition and will advise you when the schedule is known. Cummins apologizes for this inconvenience, but we are initiating this action in the interest of our customers’ safety and satisfaction with our products. Thank you for your assistance. Please confirm receipt of this communication. Sincerely, OEM Service and Quality Manager Enclosures: 1. Cummins Part 573 Defect Notification 2. List of ESNs

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23E-054 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Cummins, Inc. Submission Date : AUG 08, 2023 NHTSA Recall No. : 23E-054 Manufacturer Recall No. : C2716 Manufacturer Information : Manufacturer Name : Cummins, Inc. Address : Box 3005 Mail Code COB118 Columbus IN 47202-3005 Company phone : 812-377-5000 Population : Number of potentially involved : 59 Estimated percentage with defect : 45 % Equipment Information : Brand / Trade 1 : Cummins Inc Model : B6.7 Part No. : D313038BX03 Size : N/A Function : Diesel Engine Descriptive Information : This recall covers certain Cummins B6.7 engines that are equipped with lifting bracket Option Number LA9181 and were built during the identified product date range and sold exclusively to Navistar for installation in trucks and buses. The production “Begin” and “End” dates provided herein are based on the dates list on the affected engines’ dataplates (the engine “build date”.) Production Dates : MAR 20, 2023 – MAR 30, 2023 Description of Defect : Description of the Defect : The subject engines may have been built with an insufficiently torqued (or loose) bolt attaching the rear lifting bracket to the cylinder head. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The rear lifting bracket may detach from the cylinder head while the engine is being lifted, possibly causing the engine to swing or fall, potentially resulting in personal injury. Description of the Cause : The lower bolt that attaches the rear lifting bracket to the cylinder head may not have been properly torqued due to assembly operator error. Part 573 Safety Recall Report 23E-054 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : None. Involved Components : Component Name : Bracket, Engine Lifting Component Description : Rear Lifting Bracket Component Part Number : 4933232 Component Name : Screw, Hex Flange Head Component Description : Lower Bolt Component Part Number : 3903990 Supplier Identification : Component Manufacturer Name : N/A Address : NR NR Country : NR Chronology : 04/06/2023 – Navistar reported to Cummins that an engine had a bracket separation on their production line due to a loose bolt attaching the rear lifting bracket to the cylinder head. 04/13/2023 – Another OEM reported to Cummins that two engines had bracket separations on their production line due to a loose bolt attaching the rear lifting bracket to the cylinder head. As a result, Cummins inspected and, as necessary, repaired all the engines at that OEM. Because of this action, no engines shipped to this OEM are subject to this recall. Cummins implemented assembly process and operator training improvements at the lifting bracket assembly station. 06/09/2023 – Cummins conducted a Product Safety Hazard Analysis to evaluate the potential safety risk on Part 573 Safety Recall Report 23E-054 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 fielded units. As part of this analysis, Cummins conducted a warranty search and found no claims for this issue. 06/09/2023 – 07/11/2023 – Cummins escalated the issue through its Product Safety Defect Determination Process. 7/11/2023 – Based upon the results of the investigation, and although Cummins has no reports that defective units have been shipped beyond the OEM assembly plants, the Cummins Product Safety Defect Board decided out of an abundance of caution to conduct a safety campaign to address this condition. To date, there have been no reports of injuries related to this issue. Description of Remedy : Description of Remedy Program : The remedy is to inspect the rear lifting bracket bolts, rear lifting bracket, fuel lines and cylinder head for damage. If any bolt is observed loose or insufficiently torqued, the bracket and both bolts will be replaced. Fuel lines or cylinders heads found damaged will also be replaced. Cummins requests that it be exempt from providing notification of a reimbursement plan. Any pre-notification product failure would have been corrected under the manufacturer’s limited warranty. Accordingly, no person would be eligible for reimbursement pursuant to 573.13. How Remedy Component Differs from Recalled Component : The remedy components are the same as the recalled components because the issue is an assembly error. Identify How/When Recall Condition was Corrected in Production : Assembly process and operator training improvements at the lifting bracket assembly station were implemented on 4/13/2023. Recall Schedule : Description of Recall Schedule : Cummins expects to notify Navistar, the only affected OEM, by 07/28/2023. Subject to consultation and agreement with Navistar, Cummins will conduct the recall, including sending owner notifications. The timing of owner notification will be determined in consultation with Navistar. Cummins expects to release a safety campaign by August 24, 2023. In any event, Cummins expects to notify owners no later than 9/15/2023, pending availability of owner addresses from Navistar. Planned Dealer Notification Date : AUG 24, 2023 – AUG 24, 2023 Planned Owner Notification Date : SEP 15, 2023 – SEP 15, 2023 Part 573 Safety Recall Report 23E-054 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Purchaser Information : The following manufacturers purchased this defective/noncompliant equipment for possible use or installation in new motor vehicles or new items of motor vehicle equipment: Name : Navistar International Address : 2701 Navistar Dr Lisle IL 60532 Country : US Company Phone : 2606155684 * NR – Not Reported

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