Interlock Override Switch Not Installed – 2022 Proterra ZX5 Transit Buses

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IMPORTANT SAFETY RECALL NHTSA Recall Number: 22V-829 This notice applies to your vehicle(s): (Insert VIN or VINs) December 13, 2022 Dear Proterra Transit Bus Owner: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. What is the reason for this notice? Proterra has decided that a defect that relates to motor vehicle safety exists in certain 2022 ZX5 Transit Buses. The interlock override switch was not installed during production. Without the switch, the driver may be unable to override the interlock system and move the vehicle, necessitating the transfer of passengers to another vehicle and increasing the risk of injury. Why is your vehicle being recalled? The interlock override switch was not installed during production of the vehicles within the recall population. Proterra will provide a repair of the recalled vehicles at no cost to you. We apologize for the inconvenience. We are committed to your safety, the safety of your customers, and your continued satisfaction with our products, and we will work with you to promptly remedy the recalled vehicles. IMPORTANT • Your Proterra vehicle is subject to NHTSA Safety Recall No. 22V-829 because the interlock override switch was not installed during production. • Proterra will remedy the issue. Service instructions are provided in technical service bulletin SC-22-163. • This remedy will be provided free of charge. • Contact Proterra’s customer service department at 864-438-0000 or ServiceParts@Proterra.com if you have any questions. What will Proterra Do? Proterra will provide the owner with an interlock override switch and installation instructions, free of charge. Service repair instructions are provided in service campaign SC-22-163. Proterra customers should submit a warranty claim for the labor associated with the repair, which is estimated to be approximately thirty (30) minutes. What Should You Do? You should follow the instructions provided by Proterra and install the interlock override switch that will be provided to you. Contact your Proterra Transit field service representative at 864-438-0000 or ServiceParts@Proterra.com if you have any questions regarding the proper installation of the interlock override switch. What If You Have Already Repaired the Defect? If you have previously paid for a repair that addresses the defect described in this letter, you still need to ensure the correct parts and procedures were used. However, you may be eligible for a reimbursement of the previous repair. Please contact Proterra’s customer service team at 864-438-0000 or ServiceParts@Proterra.com to verify eligibility and process your reimbursement request. What If You Have Other Questions? Please contact Proterra’s customer service department at 864- 438-0000 or ServiceParts@Proterra.com with any questions or concerns about this notice. If, after contacting Proterra’s customer service department, you are still not satisfied we have done our best to remedy this condition without charge and within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, 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. The National Highway Traffic Safety Administration Campaign ID Number for this recall is 22V-829. Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days. VP of Transit Continuous Improvement and Quality Proterra Operating Company, Inc.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-829 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Proterra Operating Company, Inc. Submission Date : NOV 07, 2022 NHTSA Recall No. : 22V-829 Manufacturer Recall No. : TBD Manufacturer Information : Manufacturer Name : Proterra Operating Company, Inc. Address : 1815 Rollins Road Burlingame CA 94010 Company phone : 4380000 Population : Number of potentially involved : 3 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Proterra Transit Bus 35′ ZX5 and 40′ ZX5 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : The recall population was determined based on Proterra’s production records. All buses delivered to the two customers identified are included in the population. The recalled vehicles differ from vehicles not included in the recall population because they do not have an interlock override switch installed. Production Dates : SEP 28, 2022 – OCT 10, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : In the buses delivered to the two customers, an interlock override switch was inadvertently not installed during production. The interlock system stops the bus from moving when certain conditions are detected. The interlock override switch allows the driver to manually bypass the interlock to move the bus. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : In the event the interlock system is engaged and the driver is unable to override the system and move the bus, there could be an increased risk of injury due to the need to transfer passengers to alternate transportation in a potentially uncontrolled traffic condition. Proterra has not received any report of any accidents resulting from this defect. There are no reported crashes or injuries. Description of the Cause : During the production process, the interlock override switch was inadvertently not installed in buses delivered to two customers. Part 573 Safety Recall Report 22V-829 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : The driver will receive a signal on the dash when the interlock system is engaged. Involved Components : Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : A bus in the recall population experienced a condition that engaged the interlock system. The bus operator was unable to move the vehicle due to the lack of an interlock override switch. This issue was reported to Proterra in mid- October 2022. Proterra reviewed the production and quality records to determine why the bus did not have the interlock override switch, as well as the records of other buses manufactured in the same time frame. Proterra confirmed that the issue only pertained to the buses identified in the recall population. On October 31st, Proterra’s Quality Compliance Steering Committee met and decided to conduct a voluntary safety recall to address this issue. As of the date of this report, Proterra knows of no crashes, injuries, or fatalities associated with this issue. Description of Remedy : Description of Remedy Program : Proterra will provide each affected owner a kit that includes a interlock override switch and installation instructions to remedy the issue. Part 573 Safety Recall Report 22V-829 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 How Remedy Component Differs from Recalled Component : Buses subject to the recall do not have a interlock override switch installed. Identify How/When Recall Condition was Corrected in Production : Proterra will continue to monitor its production process to verify that a interlock override switch is installed in each bus. Recall Schedule : Description of Recall Schedule : The affected buses were sold to two transit agencies with their own vehicle maintenance departments. Proterra will include detailed instructions for the recall remedy as part of the letters sent to the two affected customers. Proterra will send the owner letters on or before January 3, 2023. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NOV 21, 2022 – NOV 21, 2022 * NR – Not Reported

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