Brake Lines Improperly Routed – 2021 Xos RM01, SA01 & 2021-2022 SV05

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-881 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Xos, Inc. Submission Date : NOV 29, 2022 NHTSA Recall No. : 22V-881 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Xos, Inc. Address : 3550 Tyburn St. Los Angeles CA 90065 Company phone : 2896765 Population : Number of potentially involved : 260 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2021-2021 Xos RM01 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 products that were not included in the recall because, in a certain production period, vehicles may have been produced with incorrectly routed brake lines and incorrect brake line lengths. The recall population includes one (1) Xos RM01 chassis as a potentially involved vehicle. Production Dates : DEC 23, 2021 – DEC 23, 2021 VIN Range 1 : Begin : 4T9TSCA62MB208041 End : 4T9TSCA62MB208041 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 products that were not included in the recall because, in a certain production period, vehicles may have been produced with incorrectly routed brake lines and incorrect brake line lengths. The recall population includes twenty (20) SA01 vehicles as potentially involved vehicles. Production Dates : FEB 21, 2022 – NOV 04, 2022 VIN Range 1 : Begin : 4T9TCBB67MC208021 End : 4T9TCBB60MC208040 Not sequential Part 573 Safety Recall Report 22V-881 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 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 products that were not included in the recall because, in a certain production period, vehicles may have been produced with incorrectly routed brake lines and incorrect brake line lengths. The recall population includes 239 SV05 vehicles as potentially involved vehicles. Production Dates : DEC 23, 2021 – NOV 16, 2022 VIN Range 1 : Begin : 4T9TSAAM2MB208012 End : 4T9TSAA67NB208400 ✔ Not sequential Description of Defect : Description of the Defect : Brake line routing and length may result in compromise to the integrity of the brake lines, presenting a risk of brake fluid leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A brake fluid leak that remains undetected or unaddressed can lead to an increase in stopping distance, which may increase the risk of a crash. Description of the Cause : Brake lines were incorrectly routed and installed with incorrect lengths during installation in manufacturing. Identification of Any Warning that can Occur : If a leak is present, the low brake fluid warning light will illuminate in the instrument panel. After the reservoir of the potentially affected brake circuit is completely depleted, the brake pedal travel may begin to increase or the pedal may begin to feel soft. Involved Components : Component Name 1 : Rear Right Brake Line Assembly Component Description : ABS to Wheel Component Part Number : RM01-EB-A0018 Component Name 2 : Front Right Brake Line Assembly Center BA03 Component Description : ABS to Wheel ASSY Component Part Number : RM02-EB-A0001 Part 573 Safety Recall Report 22V-881 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 3 : Brake Line Component Description : Front Wheel Component Part Number : RM01-EB-A0002 Supplier Identification : Component Manufacturer Name : Xos, Inc. Address : NR NR Country : NR Chronology : On October 2, 2022, an Xos customer reported an issue involving fracture of the brake hose on its Xos SV05 vehicle. Xos inspected the vehicle and identified separation of the brake line. Xos subsequently repaired the vehicle, inspected additional vehicles, and began an internal root cause analysis. On October 12, 2022, Xos identified brake line wear following inspection of an in-service SV05 vehicle. The affected hose was replaced and the vehicle was returned to the customer. On November 11, 2022, a second Xos customer reported wear in the rubber brake line. Xos inspected the customer’s vehicles and began replacing impacted components. On November 22, 2022, the topic was presented to Xos’s Product Safety Committee. Based upon the information presented, the Product Safety Committee decided to initiate a safety recall to address this condition. To date, there has been one (1) warranty claim and no reports of accidents or injuries related to this condition. Description of Remedy : Description of Remedy Program : The affected brake lines and related hardware on the affected 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 The recall remedy component can be distinguished from the recalled Part 573 Safety Recall Report 22V-881 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 from Recalled Component : component because the remedy component will be correctly routed and installed. Identify How/When Recall Condition was Corrected in Production : On November 18, 2022, process improvement and additional checks were implemented in production. Recall Schedule : Description of Recall Schedule : Xos intends to notify dealers and owners in accordance with the planned notification dates. Planned Dealer Notification Date : DEC 14, 2022 – DEC 14, 2022 Planned Owner Notification Date : DEC 14, 2022 – DEC 14, 2022 * NR – Not Reported

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NHTSA Recall No. 22V-881 For updated information, please visit NHTSA.gov/recalls ㅡ Xos 3550 Tyburn St. Los Angeles, CA 90065 www.xostrucks.com 2021-2022 Xos SV05 2021 Xos RM01 and SA01 Improperly Routed Brake Lines NHTSA Recall No. 22V-881 Xos Recall No. REC-001-22 January < >, 2023 IMPORTANT SAFETY RECALL This notice applies to your vehicle, VIN . Dear This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Xos, Inc. has decided that a defect which relates to motor vehicle safety may exist in your vehicle, with the VIN shown above. We apologize for this situation and want to assure you that, with your assistance, we will correct this condition. Our commitment is to provide you with the highest level of service and support. What is the issue? Brake lines may have been incorrectly routed and installed with incorrect lengths during installation in manufacturing. Brake line routing and length may result in compromise to the integrity of the brake lines, presenting a risk of brake fluid leak. What is the risk? A brake fluid leak that remains undetected or unaddressed can lead to an increase in stopping distance, which may increase the risk of a crash. What will Xos do? Xos will inspect the potentially impacted vehicles and complete necessary repairs free of charge. For most vehicles, the time required to complete the repair will be less than one hour. What should you do? The Xos Customer Experience team will contact you to schedule your inspection and repair as necessary. Please feel free to reach out to support@xostrucks.com or give us a call at 1-855-909-4407, if you have any questions. Please note that Federal law requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days. Do you have other questions? If you have further questions, please call Xos Customer Experience at 1-855-909-4407. For additional information please visit NHTSA.gov/recalls. If you believe that Xos has failed or is unable to remedy the defect within a reasonable time or without charge, you may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue S.E., Washington, D.C. 20590, or call the toll free Vehicle Safety Hot Line at 1-888-327-4236 (TTY: 1-800-424-9153) or visit safercar.gov. Thank you for your attention to this important matter. The quality and safety of your vehicle is of the utmost importance to us. Xos

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12/30/22, 2:53 PM Xos Trucks Mail – REC-001-22 Technical Instructions and Parts Process https://mail.google.com/mail/u/0/?ik=23a8049c40&view=pt&search=all&permthid=thread-f%3A1753313805029849324&simpl=msg-f%3A1753313805029849324 1/1 Briana Green <briana.green@xostrucks.com> REC-001-22 Technical Instructions and Parts Process 1 message Jessica Savage <jessica@xostrucks.com> Mon, Dec 26, 2022 at 1:32 PM Bcc: briana.green@xostrucks.com Xos Dealer Partners, Please see attached for the Technical Instructions for voluntary REC-001-22 related to brake lines. These instructions are now also posted on the Xosphere Dealer Portal in the knowledge center under Service. If you are receiving this email, you have vehicles on site and/or in your AOR that this recall pertains to. You will be sent the parts for the front rubber brake hose- all vehicles fix (OP Code 04016) in the next 7-10 days. Upon vehicle inspection, please open a service case in Xosphere if parts are required to complete any of the other items for the recall. Note: these are not being sent proactively as they do not apply on all vehicles, an inspection is needed to determine if these remaining items are necessary. Once the Xos Support team receives your case, we will have the parts sent out in a timely manner. We will wait a day or two to kit as many parts together as possible for you. When you have finalized the work, please file for warranty as you normally would via the Xosphere dealer portal. Please reach out to myself or support@xostrucks.com for any questions or concerns. Thanks, REC-001-22 Technical Instructions.pdf Jessica Savage Director, Distribution Development 312.848.8834 jessica@xostrucks.com xostrucks.com Los Angeles, CA Xos Safety Recall REC-001-22 Brake Lines Improperly Routed IMPORTANT – Read this document carefully and completely to understand the applicability of this Recall and the related repair procedure(s). Failure to follow the instructions correctly may result in incomplete repairs and duplication of efforts. Repair Overview: 1. Confirm VIN is applicable under this Safety Recall 2. Perform vehicle inspections to determine necessary repairs a. Front rubber brake hose inspections (Both sides) b. Front brake caliper bracket inspection (Both sides) c. Routing of right front steel brake line d. Routing of right rear steel brake line 3. Perform applicable repairs NOTE: All vehicles must have brake line brackets installed on both sides regardless of inspection results 4. Test drive vehicle to confirm proper operation 5. Submit warranty claim to close recall for applicable VIN Vehicle Applicability: Model Year Model Body Application 2021 – 2022 2021 SV05 RM01 Morgan Olson CITE Utilimaster Page 1 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Parts Information: Repair Type Part Number Part Name QTY Front Rubber Brake Hose – All Vehicles RM01-EB-M0078 Bracket, Stepvan, Driver Side Brake Line 1 RM01-EB-M0077 Bracket, Stepvan, Passenger Side Brake Line 1 HD10-HH-M0235 Clamp, Loop-Cushioned, 5/8″ ID, 1/4″ Mounting Hole 3 HD30-HH-M0005 Flange Nut, M6-1, Class 10, Zinc Plated 5 HD20-HH-M0006 Flange Bolt, M6-1 x 20mm, Class 10.9, Zinc Plated 5 HD30-HH-M0007 Flange Nut, M10-1.5, Class 10, Zinc Plated 1 Front Rubber Brake Hose – See inspection criteria RM01-EB-A0002 Flexible Brake Line, Front 2 RM01-EB-M0058 Brake Caliper Bracket, Rear LH & Front RH 1 RM01-EB-M0059 Brake Caliper Bracket, Rear RH & Front LH 1 HD20-HH-M0036 Flange Bolt, 5/16″-18 x 0.5″, Grade 8, Black-Phosphate 2 HD10-HH-M0012 Loom Clamp, 5/8″ Width 3/8″ Diameter 2 HD20-HH-M0200 Flange Bolt, 5/16″-18, Grade 8, Zinc Plated 2 HD30-HH-M0094 Serrated Flange Locknut, 5/16″-18, Zinc Plated 2 Right Front Brake Line – See inspection criteria RM02-EB-A0001 Right Front Brake Line 1 Right Rear Brake Line – See inspection criteria RM01-EB-A0019 Right Rear Brake Line, Front Section, ABS To Wheel 1 Varies N/A DOT 3 Brake Fluid As Needed Page 2 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Warranty Information: Model Operation Code Operation Description Time (Hours) Impacted Part # SV05 04016 Install frame-side brake hose brackets (Both Sides) and perform inspections 1 RM01-EB-M0077 04026 Replace front brake hose (Drivers side) .75 RM01-EB-A0002 04036 Replace front brake hose (Passengers side) .75 RM01-EB-A0002 04046 Replace front brake hose caliper bracket (Drivers side) .5 RM01-EB-M0059 04056 Replace front brake hose caliper bracket (Passengers side) .5 RM01-EB-M0058 04066 Replace right front brake line 4.5 RM02-EB-A0001 04076 Replace right rear brake line (Front section) 4.5 RM01-EB-A0019 Page 3 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Required Special Tools & Equipment: Tool/Equipment Description Specification Example Mobile Column Lifts >5,000 lbs capacity per lift (Required for center pack removal) Heavy Duty Jack Stands >5,000 lbs capacity each Forklift w/fork extensions >5,000 lbs capacity with 60” extensions for battery handling Mobile Scissor Lift Platform Table >1,000 lb capacity recommended for Lyra battery pack removal and replacement Page 4 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Vehicle Inspection Procedure: Front rubber brake hose inspection 1. Visually inspect both front rubber brake hoses 2. Check the rubber brake hose shape to determine if the vehicle has Hose A (Figure 1) or Hose B (Figure 2) currently installed. a. Hose A must be replaced with the correct style, Hose B – Refer to repair Section 1 – Front Rubber Brake Hose Replacement b. Hose B must be inspected for any abrasion caused by contact with the tire (Figure 3). Any visible damage caused by the tire must be resolved by replacing the hose(s) as needed. If no abrasion is noted, proceed to the next inspection – If needed, Refer to repair Section 1 – Front Rubber Brake Hose Replacement Figure 1 – Hose A (Incorrect) Figure 2 – Hose B (Correct) Page 5 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 3 – Tire abrasion/Damage on Hose 3. Check the brake caliper-to-hose support clamp (Figure 4) or bracket (Figure 5) a. Clamp-only applications must be replaced with the correct bracket – Refer to repair Section 2 – Brake Caliper Bracket Installation b. Vehicles with brackets installed require no repair, proceed to the next inspection Figure 4 – Caliper-to-hose clamp Figure 5 – Caliper-to-hose bracket (Incorrect) (Correct) Page 6 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Right Front Brake Line Inspection 1. Visually inspect the right front brake line at the ABS Assembly. The right front (RF) brake line is the 3rd fitting when counting front-to-back located on the top of the ABS Assembly (Figure 6). Figure 6 – ABS Assembly & Brake Line Locations 2. Check the routing of the brake line for clearance away from the hydraulic brake assist motor and master cylinder assembly. a. Brake line routing towards the hydraulic brake assist motor (Figure 7) must be replaced – Refer to Section 3 – Right Front Brake Line Replacement b. Brake line routing in the opposite direction of the hydraulic brake assist motor (Figure 8) does not require replacement. Page 7 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 7 – INCORRECT Brake Line Routing (Right Front & Right Rear) Figure 8 – CORRECT Brake Line Routing (Right Front & Right Rear) Page 8 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Right Rear Brake Line (Front Section) Inspection 1. Visually inspect the right rear brake line at the ABS Assembly. The right rear (RR) brake line is the 2nd fitting when counting front-to-back located on the top of the ABS Assembly (Figure 6). Figure 6 – ABS Assembly & Brake Line Locations 2. Check the routing of the brake line for clearance away from the hydraulic brake assist motor and master cylinder assembly. a. Brake line routing towards the hydraulic brake assist motor (Figure 7) must be replaced – Refer to Section 4 – Right Rear Brake Line Replacement b. Brake line routing in the opposite direction of the hydraulic brake assist motor (Figure 8) does not require replacement. Page 9 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 7 – INCORRECT Brake Line Routing (Right Front & Right Rear) Figure 8 – CORRECT Brake Line Routing (Right Front & Right Rear) Page 10 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Repair Procedures: ALL VEHICLES – Add brake line brackets on both sides 1. Remove p-clamp and frame clip from the drivers side frame rail. Discard. (Figure 9) Figure 9 – Drivers Side Frame Rail 2. Locate the two (2) holes in the power steering motor bracket (Figure 10), these will be used to mount the drivers side brake line bracket. Figure 10 – Mounting Holes for Drivers Side Brake Line Bracket Page 11 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 3. Install drivers side brake line bracket using two bolts (HD30-HH-M0006) and two nuts (HD30-HH-M0005). Torque to 25 Nm. (Figure 11 & 12) Figure 11 – Front Side of Bracket Figure 12 – Rear Side of Bracket 4. Route the drivers side rubber brake line through two p-clamps (HD10-HH-M0235) using two bolts (HD30-HH-M0006) and two nuts (HD30-HH-M0005). Torque to 25 Nm. (Figure 12) FIgure 12 – P-Clamps Securing the Rubber Brake Line Gradual Bend (Green) vs Sharp Bend (Red) IMPORTANT – If the rubber brake hose requires replacement per the inspection criteria, complete that repair FIRST. CAUTION- Routing of the rubber brake hose should be gradual (Green dotted line) and not sharp, which may kink the hose (Red dotted line) (Figure 12 above) 5. Confirm proper retention of the ABS speed sensor wire along the rubber brake hose, using existing clips, as shown (Figure 13). Page 12 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 13 – Drivers Side Speed Sensor/Rubber Brake Hose Retention 6. Locate the protruding fastener on the passenger side frame rail (Figure 14). Install the passenger side brake line bracket using the M10 nut (HD30-HH-M0007). Torque to 90 Nm. Figure 14 – Passenger Side Brake Line Bracket Mounting Location 7. Route the passenger side rubber brake line through the p-clamps (HD10-HH-M0235) using a bolt (HD30-HH-M0006) and a nut (HD30-HH-M0005). Torque to 25 Nm. (Figure 15) Page 13 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. FIgure 15 – P-Clamp Securing the Rubber Brake Line Gradual Bend (Green) vs Sharp Bend (Red) IMPORTANT – If the rubber brake hose requires replacement per the inspection criteria, complete that repair FIRST. CAUTION- Routing of the rubber brake hose should be gradual (Green dotted line) and not sharp, which may kink the hose (Red dotted line) (Figure 12 above) 8. Confirm proper retention of the ABS speed sensor wire along the rubber brake hose, using existing clips, as shown (Figure 14). Figure 14 – Passengers Side Speed Sensor/Rubber Brake Hose Retention 9. Test drive the vehicle to confirm proper operation Page 14 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Inspection-based Repair Procedures Section 1 – Front Rubber Brake Hose Replacement (Same procedure for both sides) 1. Remove the front rubber brake hose fitting from the caliper (Figure 16). Use a rubber cap, or equivalent, to reduce brake fluid leakage during the repair. Figure 16 – Rubber Brake Hose-to-Caliper Fitting 2. Remove the brake caliper bracket bolt from the caliper NOTE: Disregard if the correct brake line bracket is not installed. 3. Remove the brake hose clamp bolt from the bracket (or caliper if bracket is not present) (Figure 4) Page 15 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 4 – Incorrect Caliper P-Clamp 4. Remove the retention clips from the brake hose, leaving the other side clipped to the ABS speed sensor wire. (FIgure 13 & 14) Figure 13 – Retention Clips Figure 14 – Retention Clips 5. Remove the brake line clip from the frame-side bracket (Figure 16) Page 16 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 16 – Front Brake Line Clip 6. Remove the front rubber brake line from the steel brake line. Move the rubber cap, or equivalent, from the end of the rubber brake hose to the steel brake line to reduce brake fluid leakage during the repair. 7. Install the new rubber brake hose to the steel brake line. Torque to 16 Nm. 8. Install the brake line clip to secure the steel line and front brake rubber hose to the frame-side bracket. 9. Install the front rubber brake hose to the caliper (Figure 17) – DO NOT TIGHTEN. Figure 17 – Rubber Brake Hose-to-Caliper Fitting 10. Install the correct brake caliper bracket (Figure 18), adding if necessary, to the caliper reusing the same bolt. Torque to 24 Nm. Page 17 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. a. Drivers side brake caliper bracket – RM01-EB-M0078 b. Passenger side brake caliper bracket – RM01-EB-M0077 Figure 18 – Brake Caliper Bracket – Caliper Bolt 11. Route the front rubber brake hose through the new loom clamp (Figure 19) (HD10-HH-M0012) and secure the loom clamp to the brake caliper bracket using bolt (HD20-HH-M0200) and nut (HD30-HH-M0094). Torque to 24 Nm. Figure 19 – Brake Caliper Bracket – P-Clamp Bolt 12. Torque the front rubber brake hose-to-caliper fitting to 16 Nm. 13. Confirm proper routing of the front rubber brake hose through the newly installed brake line brackets. a. Drivers side – Reference Figure 12 Page 18 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. b. Passenger side – Reference Figure 15 Figure 12 – Proper Routing Figure 15 – Proper Routing 14. Confirm proper placement of the retention clips between the front rubber brake hose and ABS speed sensor wire. NOTE: Only perform steps 15-18 after ALL brake hose and brake line repairs have been completed. It is NOT necessary to perform these steps between Repair Sections 1, 3 and 4. 15. Bleed the brakes to remove any potential trapped air. 16. Refill the brake master cylinder with DOT 3 brake fluid to the proper level. 17. Test drive vehicle to confirm proper operation. 18. Perform post-drive inspection to confirm there are no brake fluid leaks. Section 2 – Brake Caliper Bracket Installation (Same procedure for Both Sides) 1. Loosen the front brake rubber hose fitting at the caliper (Figure 16) enough (Likely less than one full turn) to allow the steel line to rotate without deforming the steel line. Page 19 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 16 – Rubber Brake Hose-to-Caliper Fitting 2. Remove the bolt securing the incorrect clamp to the caliper. 3. Install the correct brake caliper bracket to the caliper (Figure 17) using a bolt (HD20-HH-M0036). Torque to 24 Nm. a. Drivers side brake caliper bracket – RM01-EB-M0078 b. Passenger side brake caliper bracket – RM01-EB-M0077 Figure 17 – Brake Caliper Bracket – Caliper Bolt 4. Route the front rubber brake hose through the new loom clamp (Figure 18) (HD10-HH-M0012) and secure the loom clamp to the brake caliper bracket using bolt (HD20-HH-M0200) and nut (HD30-HH-M0094). Torque to 24 Nm. Page 20 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 18 – Brake Caliper Bracket – P-Clamp Bolt 5. Torque the front rubber brake hose-to-caliper fitting to 15 Nm. NOTE: Only perform steps 6-9 after ALL brake hose and brake line repairs have been completed. It is NOT necessary to perform these steps between Repair Sections 1, 3 and 4. 6. Bleed the brakes to remove any potential trapped air. 7. Refill the brake master cylinder with DOT 3 brake fluid to the proper level. 8. Test drive vehicle to confirm proper operation. 9. Perform post-drive inspection to confirm there are no brake fluid leaks. Section 3 – Right Front Brake Line Replacement 1. Position the vehicle in the service shop with adequate space to operate the recommended forklift around the front of the vehicle. The front battery pack can be removed and installed with a forklift OR the recommended lift table. 2. Unlatch both side hood latches 3. Raise the hood, confirming the passenger side strut engages the lock 4. Turn the master switch OFF and apply appropriate lock-out/tag-out devices to ensure a safe working environment while HV system components are being serviced. 5. Remove the front bumper assembly and set it aside, taking appropriate measures to avoid paint damage. 6. Remove the front crossmember 7. Remove the front battery pack mid-pack connector 8. Disconnect the HV positive (+), HV negative (-) and low voltage data connectors from the front battery pack 9. Using either the forklift or lift table, provide adequate support under the front battery pack to allow removal of the battery-to-frame hardware. SERVICE TIP – Use 2”x4” or 4”x4” wood blocks to minimize battery case scratches and improve maneuverability between the forklift/lift table and battery pack. Page 21 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 10. Once the front battery pack is properly supported, remove the battery-to-frame mounting hardware from BOTH brackets on the passenger side of the vehicle. Leave the battery mounts in position, it is not necessary to remove them completely. SERVICE TIP – Remove all fasteners from the mount-to-frame side and battery-to-mount side of each bracket to improve maneuverability. 11. Carefully remove the front battery pack from the vehicle and set it aside in a properly designated area to maintain proper HV safety protocols. 12. Remove the right front (RF) brake line fitting from the ABS assembly as shown (Figure 6) Figure 6 – ABS Assembly & Brake Line Locations 13. Remove the brake line clip from the frame-side bracket (Figure 16) Page 22 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. Figure 16 – Front Brake Line Clip 14. Remove the front rubber brake line from the steel brake line (Figure 19) Figure 19 – Front Rubber Brake Hose to Steel Line Transition 15. Separate the right front brake line assembly from the six (6) brake turing clips along the routing of the brake line. a. Three (3) clips on the drivers side frame rail b. Two (2) clips on the second crossmember c. One (1) clip on the passenger side frame rail Page 23 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 16. Remove the brake line clamp near the ABS Assembly (Figure 20) Figure 20 – Brake Line Clamp near ABS Assembly 17. Remove the right front brake line assembly. 18. Install the new right front brake line assembly using caution not to deform the pre-bent shape during this process. 19. Attach the six (6) brake turing clips to secure the right front brake line assembly. a. Three (3) clips on the drivers side frame rail b. Two (2) clips on the second crossmember c. One (1) clip on the passenger side frame rail 20. Install the brake line clamp near the ABS Assembly. Torque to 5.5 Nm. 21. Connect the right front brake line to the right front rubber brake hose. Torque to 15 Nm. 22. Install the brake line clip in the frame-side bracket. 23. Connect the right front brake line to the ABS assembly. Torque to 16 Nm. SERVICE TIP – If also replacing the right rear brake line assembly, DO NOT reinstall the front battery pack at this time. Move to the Step 7 of Section 4 and proceed with the repair procedure. 24. Bleed the brakes to remove any potential trapped air. 25. Refill the brake master cylinder with DOT 3 brake fluid to the proper level. Page 24 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 26. Confirm there are no brake fluid leaks before proceeding with reinstallation of the front battery pack. 27. Install the front battery pack a. Torque battery-to-mount bolts to 108 Nm b. Torque mount-to-frame fasteners to 95 Nm 28. Install the front crossmember. Torque fasteners to 81 Nm 29. Install the front bumper. Torque fasteners to 81 Nm 30. Connect the HV positive (+), HV negative (-) and low voltage data connectors from the front battery pack. 31. Remove lock-out/tag-out devices from the master switch and turn to the ON position. Wait for self-check to complete successfully. 32. Close and latch the hood. Make sure the passenger side strut is properly disengaged before lowering the hood. 33. Test drive vehicle to confirm proper operation. 34. Perform post-drive inspection to confirm there are no brake fluid leaks. Section 4 – Right Rear Brake Line Replacement 1. Position the vehicle in the service shop with adequate space to operate the recommended forklift around the front and sides of the vehicle. The vehicle must be lifted approximately 30” off the ground for this repair procedure. Mobile column lifts and heavy duty jack stands can be used to support the front and rear axle. A suitable drive-on lift may also be used if the clearance between ramps is sufficient for the lift table and battery pack to fit between them. The center battery pack can be removed and installed with the recommended lift table. A forklift is NOT recommended for this repair procedure. 2. Unlatch both side hood latches 3. Raise the hood, confirming the passenger side strut engages the lock 4. Turn the master switch OFF and apply appropriate lock-out/tag-out devices to ensure a safe working environment while HV system components are being serviced. 5. REFER TO SECTION 3, Steps 2 – 11, to remove the front battery pack. 6. Raise and support the vehicle at least 30” off the ground to provide sufficient clearance for the center battery pack removal 7. Disconnect the HV positive (+), HV negative (-) and low voltage data connectors from the center battery pack 8. Using the lift table, provide adequate support under the center battery pack to allow removal of the battery-to-frame hardware. SERVICE TIP – Use 2”x4” or 4”x4” wood blocks to minimize battery case scratches and improve maneuverability between the lift table and battery pack. 9. Once the center battery pack is properly supported, remove the battery-to-frame mounting hardware from BOTH brackets on the passenger side of the vehicle. Leave the battery mounts in position, it is not necessary to remove them completely. SERVICE TIP – Remove all fasteners from the mount-to-frame side and battery-to-mount side of each bracket to improve maneuverability. Page 25 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 10. Carefully lower the center battery pack from the vehicle and set it aside in a properly designated area to maintain proper HV safety protocols. 11. Remove the right rear (RR) brake line fitting from the ABS assembly as shown (Figure 6) Figure 6 – ABS Assembly & Brake Line Locations 12. Separate the front fitting ONLY from the union connecting the front section of the right rear brake line to the rear section of the brake line. (Figure 21) Figure 21 – Right Rear Brake Line Front/Rear Section Split 13. Separate the right rear brake line assembly from the six (6) brake turing clips along drivers side of the frame rail Page 26 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 14. Remove the brake line clamp near the ABS Assembly (Figure 20) Figure 20 – Brake Line Clamp near ABS Assembly 15. Remove the right rear brake line assembly 16. Install the new right rear brake line assembly using caution not to deform the pre-bent shape during this process. 17. Attach the six (6) brake turing clips along drivers side of the frame rail 18. Install the brake line clamp near the ABS Assembly. Torque to 5.5 Nm. Page 27 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc. 19. Connect the right rear brake line to the union taking caution not to loosen, or further tighten, the fitting going to the rear of the vehicle. Torque to 16 Nm. 20. Connect the right rear brake line to the ABS assembly. Torque to 16 Nm 21. Bleed the brakes to remove any potential trapped air. 22. Refill the brake master cylinder with DOT 3 brake fluid to the proper level. 23. Confirm there are no brake fluid leaks before proceeding with reinstallation of either the center or front battery pack. Pay close attention to the union located mid-vehicle. It will NOT be accessible with the center battery pack installed. 24. Install the center battery pack a. Torque battery-to-mount bolts to 108 Nm b. Torque mount-to-frame fasteners to 95 Nm 25. Connect the HV positive (+), HV negative (-) and low voltage data connectors from the center battery pack 26. REFER TO Section 3, Steps 27-34, to complete the repair procedure. Page 28 PROPRIETARY INFORMATION: This document and the contents hereof are confidential and proprietary to Xos, Inc. Disclosure to unauthorized individuals or distribution, publication or copying is prohibited without prior written consent of Xos, Inc.

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