REC 003-23 – Electronic Parking Brake May Fail – 2021-2022 Xos SV05 & 2021 SA01

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-760 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Xos, Inc. Submission Date : NOV 10, 2023 NHTSA Recall No. : 23V-760 Manufacturer Recall No. : REC 003-23 Manufacturer Information : Manufacturer Name : Xos, Inc. Address : 3550 Tyburn St. Los Angeles CA 90065 Company phone : 316-1890 Population : Number of potentially involved : 242 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2021-2022 Xos SV05 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : NR Descriptive Information : The recall population was determined by production records. The recalled products differ from other products that were not included in the recall because, during the specified production period, vehicles may have been produced with an electronic parking brake that may malfunction under certain circumstances. The recall population includes 222 Xos SV05 vehicles as potentially involved vehicles. Production Dates : DEC 23, 2021 – MAY 23, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2021-2021 Xos SA01 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : NR Descriptive Information : The recall population was determined by production records. The recalled products differ from other products that were not included in the recall because, during the specified production period, vehicles may have been produced with an electronic parking brake that may malfunction under certain circumstances. The recall population includes twenty (20) Xos SA01 vehicles as potentially involved vehicles. Production Dates : FEB 21, 2022 – NOV 04, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-760 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : Excessive friction between a bolt and a bracket on the actuator and piston sides of the electronic parking brake (EPB) system may result in one or both of the nuts holding the hardware to the EPB bracket to come loose, causing the electronic parking brake system to lose calibration and malfunction. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The malfunction may cause the EPB not to engage, or to fail to disengage. If the EPB cannot be engaged, and the Manual Park Brake warning is ignored, and the vehicle is parked on a grade without being placed into “Park,” the vehicle could rollaway, increasing the risk of a crash. If the EPB cannot be disengaged, the vehicle may be immobilized. Description of the Cause : The design of the electronic braking system was incorrect for the application. Identification of Any Warning that can Occur : If the EPB cannot be engaged, the driver receives a warning that the EPB cannot be engaged and that the manual park brake must be engaged to secure the vehicle. If the EPB cannot be disengaged, the driver receives a stop fault alerting the driver that the vehicle is immobilized and a service light will illuminate on the dash. Involved Components : Component Name 1 : Washer Component Description : Washer from Pivot Bolt Component Part Number : HD40-HH-M0031 Component Name 2 : Bolt Component Description : NR Component Part Number : HD20-HH-M0017 Component Name 3 : Nut Component Description : NR Component Part Number : HD30-HH-M0048 Part 573 Safety Recall Report 23V-760 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : In early 2022, Xos engineering initiated an investigation into reports of EPB malfunction involving the subject vehicles. In February 2023, the engineering team concluded that excessive friction between a bolt and a bracket on the actuator and piston sides of the EPB system may result in one or both of the nuts holding the hardware to the EPB bracket to come loose, causing the EPB system to lose calibration and malfunction. Subsequently, Xos engineering conducted additional analysis on potentially impacted vehicles. On November 6, 2023 the topic was presented to Xos’s Product Safety Committee. Based upon the information presented, the Product Safety Committee decided to initiate a recall to address this condition. To date, there have been at least 45 reports related to this issue, with no reports of accidents or injuries related to this condition. Description of Remedy : Description of Remedy Program : The affected hardware on the impacted vehicles will be replaced at no cost to customers. All of the subject vehicles remain under the manufacturer’s warranty. Therefore, pursuant to 49 CFR 577.11( e), Xos requests an exemption from the reimbursement plan requirements. How Remedy Component Differs from Recalled Component : The recall remedy component can be distinguished from the recalled component because the design of the remedy component will not create excessive friction in the EPB system. In addition, the vehicle software system will be updated to include a warning that displays instructing the driver to engage the manual parking brake any time the vehicle is placed into park, instead of only displaying when the EPB fails to engage. Identify How/When Recall Condition was Corrected in Production : Vehicles shipped after May 24, 2023 were produced with an EPB system that is not impacted by this recall. Recall Schedule : Description of Recall Schedule : Customers and Dealers will be notified of the pending voluntary recall campaign beginning in November 2023. Copies of communications will be provided when available. Planned Dealer Notification Date : NOV 20, 2023 – NOV 20, 2023 Planned Owner Notification Date : DEC 11, 2023 – DEC 11, 2023 Part 573 Safety Recall Report 23V-760 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 * NR – Not Reported

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11/22/23, 1:08 PM Xos Trucks Mail – Xos Recall REC 003-23 | NHTSA Recall 23V760 | Electronic Parking Brake May Fail https://mail.google.com/mail/u/0/?ik=23a8049c40&view=pt&search=all&permmsgid=msg-f:17832106757117475 78&simpl=msg-f:17832106757117475… 1/1 Xos Recall REC 003-23 | NHTSA Recall 23V760 | Electronic Parking Brake May Fail Tue, Nov 21, 2023 at 1:29 PM To: Cc: Good afternoon , Xos is recalling certain 2021-2022 SV05 and 2021 SA01 vehicles. The bolts and brackets connecting the hardware to the electronic parking brake system may come loose, causing the parking brake to fail. Electronic parking brake failure can result in a rollaway if the vehicle is not in park with the manual park brake engaged, increasing the risk of a crash. Xos and Xos authorized dealers will replace the affected hardware and update the vehicle software, free of charge. Owner notification letters are expected to be mailed December 11, 2023. This recall applies to the following VINs in your inventory: Please be reminded that under 49 U.S.C. § 30112(a)(3), it is illegal for a manufacturer to sell, offer for sale, import, or introduce or deliver into interstate commerce, a motor vehicle or item of motor vehicle equipment that contains a safety defect once the manufacturer has notified NHTSA about that safety defect. — xostrucks.com Los Angeles, CA

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