CR5445 – 250-Amp Fuse Holder May Overheat and Cause Fire – 2017-2023 Nova Bus LFS & 2017-2022 LFS Artic Transit Buses

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-607 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Nova Bus (US) Inc. Submission Date : AUG 31, 2023 NHTSA Recall No. : 23V-607 Manufacturer Recall No. : CR5445 Manufacturer Information : Manufacturer Name : Nova Bus (US) Inc. Address : 260 Banker Road PLATTSBURGH NY 12901 Company phone : 450-472-6410 Population : Number of potentially involved : 1,189 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Nova Bus LFS Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : NR Descriptive Information : Certain diesel and CNG powered vehicles equipped with a radiator fan vertically mounted 250 ampers fuse holder configuration. Production Dates : FEB 09, 2018 – MAY 03, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2017-2022 Nova Bus LFS Artic Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : NR Descriptive Information : Certain diesel and CNG powered vehicles equipped with a radiator fan vertically mounted 250 ampers fuse holder configuration. Production Dates : AUG 22, 2017 – JUL 08, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : A 250 amperes fuse holder for the radiator cooling fans is mounted in the engine bay area at therear of the vehicle. A short circuit (unintended current draw) can develop between a continuously powered 24 volt power cable and a grounded mounting fastener that secures the fuse holder. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The defect condition can result in overheating of the fuse holder with the Part 573 Safety Recall Report 23V-607 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Safety Risk : potential for a short of the power cable to ground and increase the risk of a fire. The fire can occur while the bus is in operation or while it is parked. Description of the Cause : The root cause had not been confirmed however an engineering change modified the fuse holder’s location and orientation from horizontal to vertical. Also the available field data strongly suggests the cause is related to the accumulation of conductive road debris between the power cable and grounded mounting fastener. The accumulation is significantly more likely to occur under certain operating conditions in specific geographical areas. Identification of Any Warning that can Occur : During pre-trip inspection and scheduled preventive maintenance, a thermal event in development may be detected by looking at the fuse holder plastic cap for heat damages. Involved Components : Component Name 1 : Fuse holder Component Description : Fuse holder Component Part Number : N84769 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : See document attached for the chronology. Part 573 Safety Recall Report 23V-607 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Nova Bus will provide a service document to perform the remedy. The details of the Service remedy are not defined at the moment. Nova Bus will provide an interim remedy owner notificaion until such time that the final remedy is available. All costs associated with this corrective measure will be covered by Nova Bus. Pre-notification remedies will be addressed using the general reimbursement plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The Service remedy is not yet confirmed. Different options are currently under evaluation for serviceability and robustness. Identify How/When Recall Condition was Corrected in Production : All vehicles produced at both Nova Bus assembly plants utilize a revised power cable with a reshaped terminal end designed to increase the clearance between the terminal and mounting fastener. The fastener also has a smaller head, further improving the clearance. Additionally a nonconductive spacer behind the fuse holder improves the isolation between the fuse holder and vehicle ground. Recall Schedule : Description of Recall Schedule : Note Nova Bus does not have a dealer network and the dates entered for the planned dealer notification begin/end dates are only to avoid NHTSA Recall Portal error when submitting the recall report. Planned Dealer Notification Date : OCT 13, 2023 – OCT 13, 2023 Planned Owner Notification Date : OCT 13, 2023 – OCT 13, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-607 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Nova Bus (US) Inc. Submission Date : AUG 31, 2023 NHTSA Recall No. : 23V-607 Manufacturer Recall No. : CR5445 Manufacturer Information : Manufacturer Name : Nova Bus (US) Inc. Address : 260 Banker Road PLATTSBURGH NY 12901 Company phone : 450-472-6410 Population : Number of potentially involved : 1,189 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Nova Bus LFS Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : NR Descriptive Information : Certain diesel and CNG powered vehicles equipped with a radiator fan vertically mounted 250 ampers fuse holder configuration. Production Dates : FEB 09, 2018 – MAY 03, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2017-2022 Nova Bus LFS Artic Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : NR Descriptive Information : Certain diesel and CNG powered vehicles equipped with a radiator fan vertically mounted 250 ampers fuse holder configuration. Production Dates : AUG 22, 2017 – JUL 08, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : A 250 amperes fuse holder for the radiator cooling fans is mounted in the engine bay area at therear of the vehicle. A short circuit (unintended current draw) can develop between a continuously powered 24 volt power cable and a grounded mounting fastener that secures the fuse holder. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The defect condition can result in overheating of the fuse holder with the Part 573 Safety Recall Report 23V-607 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Safety Risk : potential for a short of the power cable to ground and increase the risk of a fire. The fire can occur while the bus is in operation or while it is parked. Description of the Cause : The root cause had not been confirmed however an engineering change modified the fuse holder’s location and orientation from horizontal to vertical. Also the available field data strongly suggests the cause is related to the accumulation of conductive road debris between the power cable and grounded mounting fastener. The accumulation is significantly more likely to occur under certain operating conditions in specific geographical areas. Identification of Any Warning that can Occur : During pre-trip inspection and scheduled preventive maintenance, a thermal event in development may be detected by looking at the fuse holder plastic cap for heat damages. Involved Components : Component Name 1 : Fuse holder Component Description : Fuse holder Component Part Number : N84769 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : See document attached for the chronology. Part 573 Safety Recall Report 23V-607 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Nova Bus will provide a service document to perform the remedy. The details of the Service remedy are not defined at the moment. Nova Bus will provide an interim remedy owner notificaion until such time that the final remedy is available. All costs associated with this corrective measure will be covered by Nova Bus. Pre-notification remedies will be addressed using the general reimbursement plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The Service remedy is not yet confirmed. Different options are currently under evaluation for serviceability and robustness. Identify How/When Recall Condition was Corrected in Production : All vehicles produced at both Nova Bus assembly plants utilize a revised power cable with a reshaped terminal end designed to increase the clearance between the terminal and mounting fastener. The fastener also has a smaller head, further improving the clearance. Additionally a nonconductive spacer behind the fuse holder improves the isolation between the fuse holder and vehicle ground. Recall Schedule : Description of Recall Schedule : Note Nova Bus does not have a dealer network and the dates entered for the planned dealer notification begin/end dates are only to avoid NHTSA Recall Portal error when submitting the recall report. Planned Dealer Notification Date : OCT 13, 2023 – OCT 13, 2023 Planned Owner Notification Date : OCT 13, 2023 – OCT 13, 2023 * NR – Not Reported

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260 Banker road, Plattsburgh, NY, USA 12901 | Tel: 1 800 350-6682 | Fax: 450 974-3001 | us.novabus.com NQF705001 version 6 INTERIM NOTICE IMPORTANT SAFETY RECALL THIS NOTICE APPLIES TO YOUR VEHICLE – SEE VIN IN APPENDIX A NHTSA RECALL NO. 23V607 Mr. Customer Transit Bus Agency 260 Banker road Plattsburgh, NY, USA 12901 September 8th, 2023 This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Nova Bus (US) Inc. has decided that a defect which relates to motor vehicle safety exists in certain Nova Bus models LFS and LFS Artic and Model Years 2017 to 2022 manufactured from August 2017 to September 2022 equipped with certain radiator fans fuse holder configuration. Certain affected vehicles may have road debris that could build up on the fuse holder for the electric cooling fans. If this happens, the fuse holder could short circuit and overheat. An overheated fuse holder could create the risk of a fire. During pre-trip inspection and scheduled preventive maintenance, a thermal event in development may be detected by looking at the fuse holder plastic cap for heat damages. Nova Bus recommends an inspection for debris accumulation in the fuse holder area and cleaning as required. Also, while the vehicle is parked, the manual power disconnect switch can be turned off to de-energized the radiator fan electrical circuit. Nova Bus recommends that you should inspect the fuse holder for heat damage (melting) before driving and to shut off the manual power disconnect switch when the vehicle is parked. The service document explaining the measures to be taken to remedy the affected vehicles will be published on Nova Bus web site https://us.novabus.com/customer-portal/. However, the corrective measure is not yet finalized. We will notify you again when the remedy is ready. Nova Bus (US) Inc. will covered the parts and labour costs of the repair according to the warranty claim policies in effect. Federal law requires that you forward a copy of this safety recall notice to the lessee within 10 days. You may be eligible to receive reimbursement for the cost of obtaining a pre-notification remedy of a problem associated with this Safety-Related Defect. Please submit copies of all documentation supporting your claim according to the requirements specified in the “General Plan for Reimbursement of Pre-notification Remedies” provided in this notification in Appendix B. After contacting your customer support manager, if you are still not able to have the Safety-Related Defect remedied without charge and within reasonable time, you may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Ave., SE., Washington, DC 20590; or call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov . 260 Banker road, Plattsburgh, NY, USA 12901 | Tel: 1 800 350-6682 | Fax: 450 974-3001 | us.novabus.com NQF705001 version 6 Safety is important to us, and we apologize for any inconvenience this situation may cause. Thank you for your attention to this important matter and we look forward to remedy your vehicle. If you have any questions regarding this Safety-Related Defect notification, please contact your customer support manager. Sincerely, Daniel Theriault Director, Field Service 260 Banker road, Plattsburgh, NY, USA 12901 | Tel: 1 800 350-6682 | Fax: 450 974-3001 | us.novabus.com NQF705001 version 6 APPENDIX A Make Model Model Year Road #. VIN Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus Nova Bus 260 Banker road, Plattsburgh, NY, USA 12901 | Tel: 1 800 350-6682 | Fax: 450 974-3001 | us.novabus.com NQF705001 version 6 APPENDIX B General Plan for Reimbursement of Pre-Notification Remedies When a Nova Bus vehicle is affected by a Safety Recall and the owner/purchaser (claimant) has the Safety-Related Defect or Noncompliance remedied at their own expense prior to receiving the manufacturer notification, Nova Bus (US) Inc. will reimburse the owner/purchaser for the reasonable amount paid (i.e. the cost of parts, labor, disposal fees and taxes) that addressed the Safety-Related Defect Noncompliance as described in the notification. To qualify, repairs must have been completed no earlier than one year prior to the release of the Safety Recall (notification to NHTSA) and no later than 10 days after the last mailing of the owner notification letters. All claims must be accompanied by accurate and complete documentation (the invoice/receipt must provide the VIN, date of repair, total amount paid and include a breakdown of the parts, labor, and other costs. Specific costs associated with this notification must be highlighted or circled on the invoice). The following information is required for your claim to be processed. Please print legibly. Date: _________________ Recall #: ______________ 17 digits VIN: ________________________________ Owner’s Name: ________________________________ Own / Lease (circle one) Address: ______________________________________ Date of Repair: _______________________________ City, State, Zip: ________________________________ Amount Requested: ___________________________ Phone#: _______________________________________ Email: _______________________________________ I CERTIFY THAT I PAID FOR REPAIRS THAT REMEDIED THE SAFETY-RELATED DEFECT OR NONCOMPLIANCE AS DESCRIBED IN THE OWNER NOTIFICATION LETTER PRIOR TO BEING NOTIFIED. I ALSO CERTIFY THAT I HAVE PROVIDED CLEAR DOCUMENTATION OF THESE REPAIRS AND THAT ALL INFORMATION PROVIDED IS COMPLETE AND ACCURATE TO THE BEST OF MY KNOWLEDGE. Claimant __________________________________________________________________ _____________________ Authorized signature and date Contact Information Submit your claim together with copies of all supporting documentation to: Nova Bus Warranty, TMAC 850, chemin Olivier Saint-Nicolas (QC) G7A 2N1 Canada Email: adm.novabus.warranty@volvo.com Allow 60 days for processing and decision. Nova Bus (US) Inc. is not responsible for claims submitted to the wrong address. This process is not intended to handle incident, accident or property damage claims. Claims of that nature must be directed to our legal department at 1000 Industriel Boulevard, Saint-Eustache, QC, Canada J7R 5A5.

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September 8, 2023 Mr. Kieran Bowden Assistant Chief Maintenance Officer – New Bus Project Management Department of Buses 750 Zerega Avenue, 2nd Floor Bronx, NY 10473 SUBJECT: B40666 Mod1 and B40673 contracts – Combustion Engines Radiator Fans Vertical Fuse Holder – delivery stop Dear Mr. Bowden, Nova Bus has determined a Safety-Related Defect that generated the Safety Recall 23V607. For Diesel and CNG bus models equipped with a radiator fans vertical fuse holder in the engine bay close to the maintenance panel, a Safety-Related Defect was identified recently and requires a remedy. An Interim Owner Notification Letter will be mailed by September 12th to the affected US customers. A remedy is required on B40666A Mod1 (209) and B40673 (135) busses. The Safety Recall 23V607 (MQR-2467) will define the remedy and order parts to cover busses in Service (aways not under the control of the plant) in a timely manner. Also, Nova Bus has stopped deliveries and will apply a remedy to the busses still at the plant and PDI facilities. The DCP-511173 is the internal process to define the procedure, order new parts and update documentation accordingly. The change will be shown next week on the Golden bus at Plattsburgh plant. We have the goal to get one single fix for production and Service, but MQR-2467 will confirm in October the final remedy in Service. If you have any questions or want to discuss, please do not hesitate to contact me. Sincerely, Léonard Guillemet Customer Project Manager NOVABUS C: +1 514 996-2550 leonard.guillemet.2@volvo.com 1000 boul. Industriel St-Eustache, QC, J7R 5A5, Canada novabus.com Cc: Susane Galarza – NYCT Herman Hubbard – NYCT Nicolas Deburghgraeve – NOVA BUS 260 Banker Road, Plattsburgh, New York, United States 12901 | Tel.: 518 566-6682 Fax: 518 957-2002 | novabus.com

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