R21-028 – Fuel Tubes May Crack and Leak Fuel – 2019-2022 MCI D4000 ISTV, D4500, 2021 D4000, D4520, 2020-2021 D4505, D4005, 2020-2022 D45CRTLE, & 2019-2021 J4500

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C. January 28, 2022 I• 11II11111111 1I1 111111 1•1 11111111 I• 1111 111 I I I I 11 I I, I 11 I I I I 11 I, I, …. AUTO .. ALL FOR AADC 400 X12 Engines for NHTSA Recall 21 E-099: Engine Serial Number Vehicle Model 4700SF Vehicle Identification Number ___ ____,_ ,____ ___ Cummins Inc. Box 3005 Columbus, IN 47202-3005 USA Mail Code: 40911 Phone 1 800 CUMMINS care.cummins.com Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care cummins.com *** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 21E-099 Cummins Campaign #C2532 INTERIM RECALL NOTIFICATION January 28, 2022 Dear Cummins Customer: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Cummins Inc. has decided that a defect which relates to motor vehicle safety exists in certain Cummins X12 Engines that were manufactured between April 26, 2016 and November 1, 2021 and for installation in mixer, truck, coach, emergency vehicle, refuse truck, recreational vehicle and crane applications. This notice applies to the engines(s)/vehicles(s) listed on the enclosed table. WHAT IS THE PROBLEM? The fuel tubes between the fuel rail and the injectors for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. WHAT ARE WE DOING ABOUT THE PROBLEM? Cummins is currently developing the permanent remedy for this issue. You will receive a second notification to inform you when the final remedy is available and to provide instructions to schedule the recall for your engine. WHAT SHOULD YOU DO? In the meantime, Cummins advises you to periodically check the injector fuel tubes for signs of leaking and to seek repairs if leaks are identified. If a leak occurs, the operator may smell diesel fuel or observe a mist. WHO SHOULD YOU CONTACT IF YOU HAVE FURTHER QUESTIONS OR CONCERNS? If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800- CUMMINS (1-800- 286-6467), or visit our website at care.cummins.com. C. Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care cummins.com If you have a complaint relative to this recall, you may report it to the following: Administrator National Highway Traffic Safety Administration 1200 New Jersey Avenue, SE Washington, DC 20590 You may also call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov. If you have not registered your Cummins product, please complete the enclosed registration card or register your product at https://prodreg.cummins.com/prodreg/#/webform/contactInfo. If you are no longer the owner of the engines(s) listed on the enclosed table, please forward this notice to the new owner or provide the new owner’s contact information to Cummins so that we can notify them of this recall. Federal law requires vehicle lessors receiving this recall notice to forward a copy of this notice to the lessee within ten (10) days. Also, it is a violation of Federal law for a dealer to deliver a new vehicle or equipment covered by this recall notice under a sale or lease until the defect has been remedied. Cummins is taking this action in the interest of your safety and satisfaction with our products. We apologize for any inconvenience and thank you for your attention to this matter. Sincerely, Campaign Administrator Cummins Inc. C.

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Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com U.S. Customer XXXX Street Address City, ST 12345-6789 X12 Engines for NHTSA Recall 21E-099: Engine Serial Number Vehicle Model Vehicle Identification Number (VIN) Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com *** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 21E-099 Cummins Campaign #C2532 Month Day, Year Dear Cummins Customer: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Cummins Inc. has decided that a defect which relates to motor vehicle safety exists in certain Cummins X12 Engines that were manufactured between April 26, 2016 and November 1, 2021 and for installation in mixer, truck, coach, emergency vehicle, refuse truck, recreational vehicle and crane applications. This notice applies to the engines(s)/vehicles(s) listed on the enclosed table. You previously received a letter informing you of this recall and advising you that Cummins was developing a remedy. A remedy is now available for your engine/vehicle. WHAT IS THE PROBLEM? The fuel tubes between the fuel rail and the injectors for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. WHAT ARE WE DOING ABOUT THE PROBLEM? Cummins has released field Safety Campaign #C2532, X12 CM2350 X119B and X12 CM2450 X137B Fuel Injector Supply Line Safety Campaign to correct this condition by replacing the fuel tubes with new fuel tubes and installing vibration isolators for cylinders 4,5 and 6. This campaign is currently available at Cummins Distributors and authorized Warranty dealers. The repair will be completed free of charge and most applications will require approximately 2 hours to complete. WHAT SHOULD YOU DO? Contact the nearest Cummins Distributor or authorized Warranty Dealer to arrange to have this campaign performed on your engine. The distributor or dealer will work with you to schedule the best date to complete the repair. In the meantime, Cummins advises you to periodically check the injector fuel tubes for signs of leaking and to seek repairs if leaks are identified. If a leak occurs, the operator may smell diesel fuel or observe a mist. Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com WHO SHOULD YOU CONTACT IF YOU HAVE FURTHER QUESTIONS OR CONCERNS? If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800-CUMMINS (1-800-286-6467), or visit our website at care.cummins.com. If you have a complaint relative to this recall, you may report it to the following: Administrator National Highway Traffic Safety Administration 1200 New Jersey Avenue, SE Washington, DC 20590 You may also call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov. If you have not registered your Cummins product, please complete the enclosed registration card or register your product at https://prodreg.cummins.com/prodreg/#/webform/contactInfo. If you are no longer the owner of the generators(s) listed on the enclosed table, please forward this notice to the new owner or provide the new owner’s contact information to Cummins so that we can notify them of this recall. Federal law requires vehicle lessors receiving this recall notice to forward a copy of this notice to the lessee within ten (10) days. Also, it is a violation of Federal law for a dealer to deliver a new vehicle or equipment covered by this recall notice under a sale or lease until the defect has been remedied. Cummins is taking this action in the interest of your safety and satisfaction with our products. We apologize for any inconvenience and thank you for your attention to this matter. Sincerely, Campaign Administrator Cummins Inc.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-971 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Motor Coach Industries Submission Date : FEB 08, 2022 NHTSA Recall No. : 21V-971 Manufacturer Recall No. : R21-028 Manufacturer Information : Manufacturer Name : Motor Coach Industries Address : 200 East Oakton Street Des Plaines IL 60018 Company phone : 1-800-241-2947 Population : Number of potentially involved : 1,125 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2021-2021 MCI D4000 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : DEC 01, 2020 – DEC 03, 2021 VIN Range 1 : Begin : 1M8SDMNA0MP016137 End : 1M8SDMNA2MP016320 ✔ Not sequential Vehicle 2 : 2019-2022 MCI D4000ISTV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : MAR 14, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M81DMNA9KP015433 End : 1M8D3F915NP103891 ✔ Not sequential Vehicle 3 : 2020-2021 MCI D4005 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : SEP 23, 2019 – DEC 21, 2020 VIN Range 1 : Begin : 1M85DMNA0LP015582 End : 1M85DMNA8MP016125 ✔ Not sequential Part 573 Safety Recall Report 21V-971 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2019-2021 MCI J4500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : APR 18, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 2MG3JMNA9KW069367 End : 2MG3JMNA3MW069948 ✔ Not sequential Vehicle 5 : 2020-2021 MCI D4505 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 21, 2019 – DEC 18, 2020 VIN Range 1 : Begin : 1M86DMNA9LP015472 End : 1M86DMNA6MP016127 ✔ Not sequential Vehicle 6 : 2021-2021 MCI D4520 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 02, 2021 – DEC 03, 2021 VIN Range 1 : Begin : 1M8D5W918MP083094 End : 1M8D5W911MP083096 ✔ Not sequential Vehicle 7 : 2020-2022 MCI D45CRTLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 29, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M8ZDMNA7LP081015 End : 1M8D4W910NP103651 ✔ Not sequential Part 573 Safety Recall Report 21V-971 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 8 : 2019-2022 MCI D4500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : FEB 05, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M8PDMNA2KP015333 End : 1M8D2W917NW104839 ✔ Not sequential Description of Defect : Description of the Defect : On Cummins 2017-2021 MY X12 diesel engines, the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. Please refer to 21E-099. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A high pressure fuel leak in the presence of an ignition source increases the risk of a fire. Description of the Cause : The subject fuel tubes (for cylinders 4, 5 and 6) are susceptible to cracking due to metal fatigue failure resulting from a combination of vibration strain, assembly strain and material strength. Please refer to 21E-099 Identification of Any Warning that can Occur : Fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Involved Components : Component Name 1 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 5536516 Component Name 2 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 5486389 Part 573 Safety Recall Report 21V-971 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 3 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 3695190 Supplier Identification : Component Manufacturer Name : Cummins Inc. Address : 301 Washington Street Mail Code 41303 Columbus Indiana 47202-3005 Country : United States Chronology : On 6 December 2021 Cummins Inc. advised Motor Coach Industries (MCI) that Equipment Recall 21E-099 had been declared with NHTSA. Cummins provided a listing of affected Engine Serial Numbers (ESN) sold to MCI. MCI began cross-matching ESN’s to Vehicle Identification Numbers. On 8 December 2021 the MCI Vehicle Safety Committee determined that a vehicle recall would be declared with NHTSA and Transport Canada. On 15 December 2021 MCI declared a Vehilce Recall with NHTSA. Description of Remedy : Description of Remedy Program : For engines having 75 miles or less, the remedy will consist of adding vibration isolators to the fuel tubes; fuel tubes do not need to be replaced. For all other engines, the subject fuel tubes for cylinders 4, 5 and 6 (the rear half of the engine) will be replaced with new fuel tubes (having the same part number as the recalled components) and vibration isolators will be added to the fuel tubes to engines. Cummins Inc. is paying parts and labor to accomplish this corrective action. Once parts are available, customers will receive written notification from Cummins Inc. decribing how to get this corrective action incorporated on thier vehicles at no cost by any authroized Cummins dealer. How Remedy Component Differs from Recalled Component : The replacement fuel tubes will also have vibration isolators. The fuel tube and vibration isolator combination will have a new part number. Part 573 Safety Recall Report 21V-971 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 Identify How/When Recall Condition was Corrected in Production : Cummins has identified the first engine shipped to MCI which has the corrective action implemented as ESN 75099185. All 2017-2021 MY Cummins X12 engine recieved prior to that will be subject to corrective action prior to shipping/installation. Recall Schedule : Description of Recall Schedule : MCI does not have a dealer network. MCI will coordinate with Cummins for owner notification. Owner notification is anticipated to begin in January of 2022. Planned Dealer Notification Date : JAN 28, 2022 – JAN 28, 2022 Planned Owner Notification Date : JAN 28, 2022 – FEB 04, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-971 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Motor Coach Industries Submission Date : DEC 15, 2021 NHTSA Recall No. : 21V-971 Manufacturer Recall No. : R21-028 Manufacturer Information : Manufacturer Name : Motor Coach Industries Address : 200 East Oakton Street Des Plaines IL 60018 Company phone : 1-800-241-2947 Population : Number of potentially involved : 1,125 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2022 MCI D4000ISTV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : MAR 14, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M81DMNA9KP015433 End : 1M8D3F915NP103891 ✔ Not sequential Vehicle 2 : 2021-2021 MCI D4000 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : DEC 01, 2020 – DEC 03, 2021 VIN Range 1 : Begin : 1M8SDMNA0MP016137 End : 1M8SDMNA2MP016320 ✔ Not sequential Vehicle 3 : 2020-2021 MCI D4505 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 21, 2019 – DEC 18, 2020 VIN Range 1 : Begin : 1M86DMNA9LP015472 End : 1M86DMNA6MP016127 ✔ Not sequential Part 573 Safety Recall Report 21V-971 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2020-2021 MCI D4005 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : SEP 23, 2019 – DEC 21, 2020 VIN Range 1 : Begin : 1M85DMNA0LP015582 End : 1M85DMNA8MP016125 ✔ Not sequential Vehicle 5 : 2019-2022 MCI D4500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : FEB 05, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M8PDMNA2KP015333 End : 1M8D2W917NW104839 ✔ Not sequential Vehicle 6 : 2021-2021 MCI D4520 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 02, 2021 – DEC 03, 2021 VIN Range 1 : Begin : 1M8D5W918MP083094 End : 1M8D5W911MP083096 ✔ Not sequential Vehicle 7 : 2020-2022 MCI D45CRTLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 29, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M8ZDMNA7LP081015 End : 1M8D4W910NP103651 ✔ Not sequential Part 573 Safety Recall Report 21V-971 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 8 : 2019-2021 MCI J4500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : APR 18, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 2MG3JMNA9KW069367 End : 2MG3JMNA3MW069948 ✔ Not sequential Description of Defect : Description of the Defect : On Cummins 2017-2021 MY X12 diesel engines, the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. Please refer to 21E-099. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A high pressure fuel leak in the presence of an ignition source increases the risk of a fire. Description of the Cause : The subject fuel tubes (for cylinders 4, 5 and 6) are susceptible to cracking due to metal fatigue failure resulting from a combination of vibration strain, assembly strain and material strength. Please refer to 21E-099 Identification of Any Warning that can Occur : Fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Involved Components : Component Name 1 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 5536516 Component Name 2 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 5486389 Part 573 Safety Recall Report 21V-971 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 3 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 3695190 Supplier Identification : Component Manufacturer Name : Cummins Inc. Address : 301 Washington Street Mail Code 41303 Columbus Indiana 47202-3005 Country : United States Chronology : On 6 December 2021 Cummins Inc. advised Motor Coach Industries (MCI) that Equipment Recall 21E-099 had been declared with NHTSA. Cummins provided a listing of affected Engine Serial Numbers (ESN) sold to MCI. MCI began cross-matching ESN’s to Vehicle Identification Numbers. On 8 December 2021 the MCI Vehicle Safety Committee determined that a vehicle recall would be declared with NHTSA and Transport Canada. On 15 December 2021 MCI declared a Vehilce Recall with NHTSA. Description of Remedy : Description of Remedy Program : For engines having 75 miles or less, the remedy will consist of adding vibration isolators to the fuel tubes; fuel tubes do not need to be replaced. For all other engines, the subject fuel tubes for cylinders 4, 5 and 6 (the rear half of the engine) will be replaced with new fuel tubes (having the same part number as the recalled components) and vibration isolators will be added to the fuel tubes to engines. Cummins Inc. is paying parts and labor to accomplish this corrective action. How Remedy Component Differs from Recalled Component : The replacement fuel tubes will also have vibration isolators. The fuel tube and vibration isolator combination will have a new part number. Identify How/When Recall Condition was Corrected in Production : Cummins has identified the first engine shipped to MCI which has the corrective action implemented as ESN 75099185. All 2017-2021 MY Cummins X12 engine recieved prior to that will be subject to corrective action prior to shipping/installation. Part 573 Safety Recall Report 21V-971 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : MCI does not have a dealer network. MCI will coordinate with Cummins for owner notification. Owner notification is anticipated to begin in January of 2022. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-971 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Motor Coach Industries Submission Date : FEB 08, 2022 NHTSA Recall No. : 21V-971 Manufacturer Recall No. : R21-028 Manufacturer Information : Manufacturer Name : Motor Coach Industries Address : 200 East Oakton Street Des Plaines IL 60018 Company phone : 1-800-241-2947 Population : Number of potentially involved : 1,125 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2021-2021 MCI D4000 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : DEC 01, 2020 – DEC 03, 2021 VIN Range 1 : Begin : 1M8SDMNA0MP016137 End : 1M8SDMNA2MP016320 ✔ Not sequential Vehicle 2 : 2019-2022 MCI D4000ISTV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : MAR 14, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M81DMNA9KP015433 End : 1M8D3F915NP103891 ✔ Not sequential Vehicle 3 : 2020-2021 MCI D4005 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : SEP 23, 2019 – DEC 21, 2020 VIN Range 1 : Begin : 1M85DMNA0LP015582 End : 1M85DMNA8MP016125 ✔ Not sequential Part 573 Safety Recall Report 21V-971 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2019-2022 MCI D4500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : FEB 05, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M8PDMNA2KP015333 End : 1M8D2W917NW104839 ✔ Not sequential Vehicle 5 : 2020-2021 MCI D4505 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 21, 2019 – DEC 18, 2020 VIN Range 1 : Begin : 1M86DMNA9LP015472 End : 1M86DMNA6MP016127 ✔ Not sequential Vehicle 6 : 2021-2021 MCI D4520 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 02, 2021 – DEC 03, 2021 VIN Range 1 : Begin : 1M8D5W918MP083094 End : 1M8D5W911MP083096 ✔ Not sequential Vehicle 7 : 2020-2022 MCI D45CRTLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : AUG 29, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 1M8ZDMNA7LP081015 End : 1M8D4W910NP103651 ✔ Not sequential Part 573 Safety Recall Report 21V-971 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 8 : 2019-2021 MCI J4500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : Recall Population is based on the affected engine serial number listing supplied to MCI by Cummins Inc. in response to 21E-099. Production Dates : APR 18, 2019 – DEC 03, 2021 VIN Range 1 : Begin : 2MG3JMNA9KW069367 End : 2MG3JMNA3MW069948 ✔ Not sequential Description of Defect : Description of the Defect : On Cummins 2017-2021 MY X12 diesel engines, the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. Please refer to 21E-099. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A high pressure fuel leak in the presence of an ignition source increases the risk of a fire. Description of the Cause : The subject fuel tubes (for cylinders 4, 5 and 6) are susceptible to cracking due to metal fatigue failure resulting from a combination of vibration strain, assembly strain and material strength. Please refer to 21E-099 Identification of Any Warning that can Occur : Fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Involved Components : Component Name 1 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 5536516 Component Name 2 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 5486389 Part 573 Safety Recall Report 21V-971 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 3 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : Cummins PN 3695190 Supplier Identification : Component Manufacturer Name : Cummins Inc. Address : 301 Washington Street Mail Code 41303 Columbus Indiana 47202-3005 Country : United States Chronology : On 6 December 2021 Cummins Inc. advised Motor Coach Industries (MCI) that Equipment Recall 21E-099 had been declared with NHTSA. Cummins provided a listing of affected Engine Serial Numbers (ESN) sold to MCI. MCI began cross-matching ESN’s to Vehicle Identification Numbers. On 8 December 2021 the MCI Vehicle Safety Committee determined that a vehicle recall would be declared with NHTSA and Transport Canada. On 15 December 2021 MCI declared a Vehilce Recall with NHTSA. Description of Remedy : Description of Remedy Program : For engines having 75 miles or less, the remedy will consist of adding vibration isolators to the fuel tubes; fuel tubes do not need to be replaced. For all other engines, the subject fuel tubes for cylinders 4, 5 and 6 (the rear half of the engine) will be replaced with new fuel tubes (having the same part number as the recalled components) and vibration isolators will be added to the fuel tubes to engines. Cummins Inc. is paying parts and labor to accomplish this corrective action. How Remedy Component Differs from Recalled Component : The replacement fuel tubes will also have vibration isolators. The fuel tube and vibration isolator combination will have a new part number. Identify How/When Recall Condition was Corrected in Production : Cummins has identified the first engine shipped to MCI which has the corrective action implemented as ESN 75099185. All 2017-2021 MY Cummins X12 engine recieved prior to that will be subject to corrective action prior to shipping/installation. Part 573 Safety Recall Report 21V-971 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : MCI does not have a dealer network. MCI will coordinate with Cummins for owner notification. Owner notification is anticipated to begin in January of 2022. Planned Dealer Notification Date : JAN 28, 2022 – JAN 28, 2022 Planned Owner Notification Date : JAN 28, 2022 – FEB 04, 2022 * NR – Not Reported

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