Recall 224 – Hydrogen Leak from Detached Inlet Filter – 2019 Hyundai Nexo

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This notice applies to your Hyundai, VIN: XXXXXXXXXXXXXXXXX Dear This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Hyundai has decided that a defect, which relates to motor vehicle safety, exists in certain 2019 model year Nexo vehicles. Your vehicle, with the VIN shown above, is among the impacted vehicles. Hyundai is initiating a safety recall to repair a condition involving the hydrogen fuel system in the U.S. and Canada. The purpose of this letter is to explain what the recall is about and to keep you informed of Hyundai’s recall implementation plan. We are currently preparing to implement the safety recall remedy which when available, will be performed at no cost to you. We will send you another notification when the remedy is available. What is the problem? Immediately following hydrogen refueling, the inlet receptacle filter material could detach and increase the risk of a hydrogen fuel leak. A hydrogen gas leak could increase the risk of a vehicle fire while parked or driving. What should you do in the interim? We appreciate your patience. Hyundai is currently preparing to implement the recall remedy. You will receive a second notification letter when the remedy is available. In the interim, Hyundai strongly recommends owners to park their vehicles outside and away from structures until the remedy is completed. For updated information regarding this recall, please visit: www.HyundaiUSA.com/Campaign224 If you have other questions If you require further assistance, you may contact the Hyundai Customer Care Center at 1-855-371-9460. If you believe that the dealer and/or Hyundai has failed or is unable to remedy the defect without charge, or within a reasonable time, 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 go to https://www.safercar.gov. Thank you for your attention to this important safety matter. We apologize for any inconvenience this may have caused you. Hyundai Motor America Hyundai Motor America P.O. Box 20839 Fountain Valley, CA 92728-9937 IMPORTANT SAFETY RECALL 2019 Nexo Hydrogen Fuel Inlet This is an important Safety Recall. • We are currently preparing the remedy. We will notify you when the remedy is ready. • Owners are strongly recommended to park vehicles outside and away from structures. • For updated information, you can visit: www.HyundaiUSA.com/Campaign224 Importante Retiro del Mercado por Motivos de Seguridad — Si tiene preguntas llama 1-800-633-5151 y oprima “8” NHTSA Recall Number: 22V-228 Hyundai Recall Number: 224

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This notice applies to your Hyundai, VIN: XXXXXXXXXXXXXXXXX Dear This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Hyundai has decided that a defect, which relates to motor vehicle safety, exists in certain 2019 model year Nexo vehicles. Your vehicle, with the VIN shown above, is among the impacted vehicles. Hyundai is initiating a safety recall to repair a condition involving the hydrogen fuel system in the U.S. and Canada. The purpose of this letter is to explain what the recall is about and to keep you informed of Hyundai’s recall implementation plan. We are currently preparing to implement the safety recall remedy which when available, will be performed at no cost to you. We will send you another notification when the remedy is available. What is the problem? Immediately following hydrogen refueling, the inlet receptacle filter material could detach and increase the risk of a hydrogen fuel leak. A hydrogen gas leak could increase the risk of a vehicle fire while parked or driving. What should you do in the interim? We appreciate your patience. Hyundai is currently preparing to implement the recall remedy. You will receive a second notification letter when the remedy is available. In the interim, Hyundai strongly recommends owners to park their vehicles outside and away from structures until the remedy is completed. For updated information regarding this recall, please visit: www.HyundaiUSA.com/Campaign224 If you have other questions If you require further assistance, you may contact the Hyundai Customer Care Center at 1-855-371-9460. If you believe that the dealer and/or Hyundai has failed or is unable to remedy the defect without charge, or within a reasonable time, 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 go to https://www.safercar.gov. Thank you for your attention to this important safety matter. We apologize for any inconvenience this may have caused you. Hyundai Motor America Hyundai Motor America P.O. Box 20839 Fountain Valley, CA 92728-9937 IMPORTANT SAFETY RECALL 2019 Nexo Hydrogen Fuel Inlet This is an important Safety Recall. • We are currently preparing the remedy. We will notify you when the remedy is ready. • Owners are strongly recommended to park vehicles outside and away from structures. • For updated information, you can visit: www.HyundaiUSA.com/Campaign224 Importante Retiro del Mercado por Motivos de Seguridad — Si tiene preguntas llama 1-800-633-5151 y oprima “8” NHTSA Recall Number: 22V-228 Hyundai Recall Number: 224

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Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service Advisors, Technicians, Body Shop Manager, Fleet Repair Technical Service Bulletin GROUP NUMBER RECALL 22-01-072H DATE MODEL(S) SEPTEMBER 2022 NEXO (FE) SUBJECT: HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) Description: Certain 2019MY NEXO (FE) vehicles may exhibit hydrogen gas leakage in the fuel injection line receptacle caused by parts out of specification. This bulletin outlines the procedures to inspect and replace the receptacle and fuel-line related parts if receptacle measurement is outside of specifications. Applicable Vehicles: Certain 2019MY NEXO (FE) vehicles.  IMPORTANT This TSB includes STUI pictures as a requirement. Where indicated, please include a copy of the RO or last 6 digits of the VIN and date of repair on a piece of paper. Ensure the VIN and date of repair are clearly visible. Finally, please ensure all captured pictures are completed according to the steps in this TSB and uploaded to STUI. All claims submitted that have illegible, incomplete, missing, or incorrect picture(s) are subject to debit. STUI The TSB repair procedure MUST be performed at an authorized Hyundai NEXO fuel cell vehicle dealer and by a an Hyundai Expert (or above level) technician who has successfully completed the Fuel Cell Electric Vehicle Training Instructor Led Training course (SV CHFCEVTRAIN222_1097). Refer to OSHA standard 1910.137 – Electrical Protective Equipment for PPE inspection and testing requirements and the NEXO shop manual for PPE usage. NOTICE HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 2 of 25 SUBJECT: SUBJECT: Parts Information: If the receptacle inspection is out of specification, then replace the charge receptacle assembly and the 9 related parts listed below (10 total parts). PART NAME FIGURE PART NUMBER REMARKS Charge Receptacle Assembly 35950-M5000QQH 1 each Check Valve Manifold 35909- M5000QQH 1 each High Pressure Fuel Lines 35916-M5000QQH Regulator (1 each) 35961-M5000QQH Front Tank (1 each) 35962-M5000QQH Center Tank (1 each) 35963-M5000QQH Rear Tank (1 each) High Pressure Regulator Assembly 35982-M5001QQH (1 each) O-Ring: High Pressure Sensor 15.8mm Outside Diameter 359C3-M5000 Available via regular parts order (1 each / 3 in total) O-Ring: High Pressure Sensor 8.1mm Outside Diameter 359B1-M5000 O-Ring: Middle Pressure Sensor 12.5mm Outside Diameter 359C1-M5000 O-Ring Lubricant No Image Molykote HP-300 100-gram container Directly supplied. Quantity sufficient for 1,000 vehicles HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 3 of 25 SUBJECT: SUBJECT: Special Service Tools (SST) Information TOOL NAME FIGURE TOOL NUMBER REMARKS Hydrogen Receptacle Depth Gauge Kit Depth Gauge (Z0033) Adapter Kit (TE-HMA-FRA) SST directly supplied Contact [email protected] for additional kits Hydrogen supply tube release tool 09356-4W110 Contained in previously Supplied Nexo dealer SST kit Contact [email protected] for additional kits. O-ring Installation Tool 09356-4W270 Warranty Information: MODEL OP CODE OPERATION OP TIME CAUSAL PART NATURE CODE CAUSE CODE NEXO (FE) 21D051R2 Receptacle Inspection Only 0.3 M/H 35950-M5000QQH B21 ZZ1 21D051R3 Receptacle Inspection & Parts Replacement: Fuel Level < 11% 2.4 M/H 21D051R4 Receptacle Inspection & Parts Replacement: Fuel Level ≥ 11% 3.2 M/H NOTE 1: Op codes 21D051R3 and 21D051R4 require defueling and refueling of the vehicle. Both include the following: • Labor time for the defueling process as outlined in a separate TSB 22-FL-005H (or latest) • $150 sublet ($50 to transport the vehicle to the fueling station + $100 for fuel to refuel) Please DO NOT submit a separate claim with duplicate labor or sublet for the items outlined above. NOTE 2: Submit claim on Campaign Claim Entry Screen. NOTE 3: If a part that is not covered by this recall needs replacement while performing this recall, and the affected part is still under warranty, submit a separate claim using the same repair order. If the part is out of warranty, submit a prior approval request for goodwill consideration prior to the work. NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center (WTC) parts return process. Claim is subject to debit if the part is requested and not returned. NOTE 5: Claim must include a STUI picture of the inspection procedure’s measurement that is clearly visible along with a piece of paper displaying the last 6 digits of the VIN and date of the measurement. If replacement of parts is required, please also include STUI picture as instructed prior to defueling and after refueling the vehicle. Be Be sure to check vehicle for outstanding campaigns requiring defueling and perform all repairs sure to check vehicle for outstanding campaigns requiring defueling and perform all repairs together.together. NOTICE NOTICE HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 4 of 25 SUBJECT: SUBJECT: HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 5 of 25 SUBJECT: SUBJECT: Service Procedure: Refer to the QR code or link below for guided video information: https://vimeo.com/747838771/375a8140ea Inspection Procedure: 1. Turn off the vehicle. 2. Release the fuel door (A). 3. Remove the receptacle cap (B). 4. Press the hydrogen receptacle depth gauge power switch (C) to turn it ON. C C Gauge pin Pin position manipulator Gauge guide HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 6 of 25 SUBJECT: SUBJECT: 5. Insert the depth gauge into the measurement adapter and place the adapter against the surface of the GDS glass. Push the pin position manipulator in until the gauge pin touches the surface of the GDS glass and then press the ZERO button. Remove the adapter from the digital depth gauge. HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 7 of 25 SUBJECT: SUBJECT: 6. Insert the measurement adapter into the fill receptacle until it stops. 7. Insert the digital depth gauge pin into the adapter. With firm pressure, hold the adapter and depth gauge against the flange inside the receptacle. Push in the pin position manipulator and record the measurement on the digital display. If the gauge and adapter are not If the gauge and adapter are not firmly firmly held held against against tthe he inner flange in the inner flange in the recepticarecepticall,, thenthen aa measurement error will measurement error will occur. occur. NOTICE NOTICE Flange HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 8 of 25 SUBJECT: SUBJECT: 8. Photograph the measurement and a paper showing the last 6 digits of the VIN or RO #, and the date of measurement. 9. If the measurement is greater than 3.2mm, the inspection procedure is complete. NO OTHER WORK IS REQUIRED. Submit OP Code 21D051R2. If the measurement is less than or equal to 3.2mm, then replace the parts identified on page 2 using the following procedures. Using STUI, Using STUI, photograph the photograph the measurementmeasurement on the gauge digital display. Ion the gauge digital display. Includenclude in in the photos the photos a piece of paper containing a piece of paper containing the last 6 digits of the VIN or the RO #,the last 6 digits of the VIN or the RO #, andand the date of the date of measurementmeasurement. Ensure the . Ensure the ddigital display igital display and note are and note are captured and captured and in focusin focus.. Upload the photo to STUI.Upload the photo to STUI. STUI STUI HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 9 of 25 SUBJECT: SUBJECT: Determine Hydrogen Storage Tank Pressure Using GDS-M 1. Connect the GDS-M, select the HMU, and then confirm the storage tank pressure. 2. Place the vehicle in READY mode using the START / STOP push button. Photograph the fuel gauge level and a paper showing the last 6 digits of the VIN or RO #, and the date of defueling. Using STUI, Using STUI, photograph the fuel photograph the fuel gauge. gauge. IIncludenclude in the photos in the photos a piece of paper a piece of paper containing the last 6 digits of the VIN or containing the last 6 digits of the VIN or the RO #, the RO #, and and the date of the date of the defuelingthe defueling. . Ensure the Ensure the fuel gaugefuel gauge displaydisplay, odometer,, odometer, and note are and note are captured and captured and in focus.in focus. Upload the photo to STUI.Upload the photo to STUI. STUI STUI Vehicle is in READY mode when Indicator is illuminated. HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 10 of 25 SUBJECT: SUBJECT: 3. If storage tank pressure is less than 1,100 PSI, then go to Depleting Residual Fuel Supply Using GDS-M below. 4. If storage tank pressure is greater than 1,100 PSI, then refer to TSB 22-FL-005H—VENTING NEXO FUEL CELL ELECTRIC VEHICLES (FCEV) or the latest version. Defuel (vent) the hydrogen storage tanks to a final pressure of 1,100 PSI before continuing with the service procedures on the following pages. Depleting Residual Fuel Supply Pressure Using GDS-M: 1. Storage tank pressure must be at or below 1,100 PSI. Raise the vehicle on a lift. 2. Remove the mounting bolts and floor undercover (D). D HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 11 of 25 SUBJECT: SUBJECT: 3. Close the manual valves on all 3 hydrogen tanks using a 6 mm Allen wrench turning the valve clockwise. DO NOT tighen past the torque specification. Tightening Torque: 3.6 – 7.2 lb-ft (4.9 – 9.8 Nm) 4. Turn off the ignition switch. 5. Connect the GDS to Data Link Connector (DLC). 6. Turn on the ignition switch. 7. Select “Vehicle, Model Year, Engine, System”. 8. Select ” Vehicle S/W Management”. 9. Select “Fuel Supply Valve Open Mode”. 10. Perform the operation as directed by GDS-M. 11. Proceed to Preparation for Replacement of Hydrogen Components on page 12. Some components of the manual valve Some components of the manual valve may be damaged if overmay be damaged if over–torqued.torqued. Manual valves must be closed before Manual valves must be closed before performing release of residual hydrogen performing release of residual hydrogen in the fuel supply piping. in the fuel supply piping. NOTICE NOTICE If the “Fuel Supply Valve Open Mode Using GDS-M” procedure cannot be performed, then refer to the “Manually Depleting Residual Fuel Supply Pressure” below, to release the residual pressure in the fuel supply line. NOTICE NOTICE HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 12 of 25 SUBJECT: SUBJECT: Manually Depleting Residual Fuel Supply Pressure: 1. Manually depleting residual hydrogen from the fuel supply line must be performed at an approved outdoor venting location. 2. Refer to TSB 22-FL-005H—VENTING NEXO FUEL CELL ELECTRIC VEHICLES (FCEV) or the latest version, and follow procedure to manually deplete the residual fuel supply pressure. 3. Proceed to Preparation for Replacement of Hydrogen Components below. Preparation for Replacement of Hydrogen Components 1. In the rear cargo area, remove the floorboard and cargo tray to access the 12 volt battery connector and high voltage battery Safety Plug. 2. Disconnect the 12 volt battery negative (-) connector. HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 13 of 25 SUBJECT: SUBJECT: 3. Remove the metal shield to access the High Voltage Safety Plug. 4. Follow A-D below to remove the orange high voltage safety plug. Store the removed safety plug in a secure location outside and away from the vehicle. Refer to the shop manual Refer to the shop manual — Battery Control System > High Voltage Battery Handling Battery Control System > High Voltage Battery Handling Guide and follow the High Voltage ShutGuide and follow the High Voltage Shut–off Procedure.off Procedure. Before performing the service procedure, ensure proper Personal Protection Equipment Before performing the service procedure, ensure proper Personal Protection Equipment (PPE) is worn to prevent injury. Verify PPE is not expired and in proper working (PPE) is worn to prevent injury. Verify PPE is not expired and in proper working condition. condition. WARNING WARNING ! ! A B D Pull the green safety plug lock tab Press down on the safety plug lever Remove the safety plug C Safety Plug Removal Safety Plug Removal HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 14 of 25 SUBJECT: SUBJECT: 5. Wait 5+ minutes to allow the high voltage system capacitor to discharge. 6. Open the hood. Remove the junction box trim and cover. 7. Using a Digital Volt Ohm Meter (DVOM), measure the voltage across the inverter positive and negative bus bar terminals to inspect for capacitor discharge. If the measured voltage is below 30V, the High Voltage Circuit is properly shut down. Junction Box Trim HVJB Cover High voltage junction box cover: Assembly bolt torque. 9.8 – 11.8 N.m (1.0 – 1.2 kgf.m, 7.2 – 8.7 lb-ft _ – + Measure Voltage Here The High Voltage Junction Box (HVJB) may be electrically energized up to 450 volts. The High Voltage Junction Box (HVJB) may be electrically energized up to 450 volts. DANGER DANGER ! ! HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 15 of 25 SUBJECT: SUBJECT: Component Replacement Procedure 1. Open the fuel charging door and remove the inlet receptacle assembly mounting bolts (E). Tightening Torque: 5.4 – 7.3 lb-ft (7.4 – 9.9 Nm) 2. Remove the wheel liner to access the receptacle assembly. 3. Use a wrench to keep the check valve (F) in place and loosen the fuel filler tube flange nut (G). E E F G HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 16 of 25 SUBJECT: SUBJECT: 4. Separate the receptacle brackets (H) from their mounting studs, unplug connector, and then remove the charger receptacle assembly from the vehicle. 5. Remove the rear vehicle undercover (I). Tightening Torque: 5.1 – 8.0 lb-ft (6.8 – 10.8 Nm) Charger receptacle assembly H I HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 17 of 25 SUBJECT: SUBJECT: 6. Remove the high-pressure sensor connector and the high-pressure sensor (J) connected to the manifold. Tightening Torque High Pressure Sensor: 28.9 – 40.5 lb-ft (39.2 – 54.9 Nm) 7. Loosen the flange nuts on the 4 fuel tubes (K) connected to the check valve manifold and remove the manifold. Tightening Torque (Manifold Side): 20.3 – 24.6 lb-ft (27.5 – 33.4 Nm) High High–pressure sensor Opressure sensor O–rings must be rings must be replaced before reinstalling the highreplaced before reinstalling the high–pressure pressure sensor.sensor. Refer to step 1Refer to step 155 on page 2on page 211.. NOTICE NOTICE J K HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 18 of 25 SUBJECT: SUBJECT: 8. Remove the 3 fuel tubes (L, M, and N) connected to each hydrogen tank solenoid valve. Tightening Torque (Hydrogen Tank Side): 23.9 – 28.2 lb-ft (32.4 – 38.3 Nm) Front Tank Middle Tank Rear Tank L L M N N HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 19 of 25 SUBJECT: SUBJECT: 9. Carefully remove the rear tank tube by maneuvering the tube above the rear suspension frame and toward the front of the vehicle. 10. Remove the middle pressure sensor connector, the middle pressure sensor (O), and the fuel tube (P). Tightening Torque Middle Pressure Sensor: 7.38 – 10.27 lb-ft (10.0 – 13.93 Nm) Middle Middle–pressure sensor Opressure sensor O–ring must be ring must be replaced before reinstalling the middlereplaced before reinstalling the middle–pressure sensor.pressure sensor. Refer to Refer to step 1step 166 on page 2on page 255.. NOTICE NOTICE O P HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 20 of 25 SUBJECT: SUBJECT: 11. Disconnect the middle pressure fuel tube (Q) using the tube remover SST. 12. Remove the high-pressure regulator assembly. 13. Install the supplied high pressure regulator assembly and remaining parts in the reverse order of a removal. Q Tube Remover SST: Tube Remover SST: 0935609356–4W1104W110 NOTICE NOTICE HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 21 of 25 SUBJECT: SUBJECT: 14. To keep the sealing surfaces clean and prevent debris intrusion, keep the protective caps and plugs on the junction block and high-pressure regulator until the moment lines and sensors are connected. 15. High-Pressure Sensor Installation: I. Replace and lubricate the smaller O-ring (R) with Molykote HP-300. II. Replace the larger O-ring (S), but DO NOT lubricate. III. Refer to Nexo shop manual: NEXO(FE) > 2019 > 113KW > Hydrogen Storage System > Repair Procedures > Hydrogen Storage System O-ring Replacement Procedure R R S S HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 22 of 25 SUBJECT: SUBJECT: 16. Middle-Pressure Sensor Installation: I. Replace the O-ring (T) but DO NOT lubricate. II. Refer to Nexo shop manual: NEXO(FE) > 2019 > 113KW > Hydrogen Storage System > Repair Procedures > Hydrogen Storage System O-ring Replacement Procedure 17. To keep the sealing surfaces clean and prevent debris intrusion, ensure the protective caps remain on the fuel lines until the moment they connect. Ensure all tube nuts are connected and torqued to specification. T T T T HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 23 of 25 SUBJECT: SUBJECT: 18. Rear Tank Tube Installation: To install the rear tank tubing, prepare the replacement tube by sliding the tube nut (tank end) approximately 3 inches away from end of tube. Use tape to hold the nut in position and tape the protective cover in position. This will facilitate maneuvering the rear tank tubing around and above the rear suspension. Ensure the rear tank tubing is in the same position as when it was removed. The images show where to tape the tube nut and end protective cap. The replacement tube is at the top of the image and the removed tube is at the bottom of the image. Ensure all tube nuts are connected and torqued to specification. D DO NOTO NOT to force or bend tubing while to force or bend tubing while maneuvering the rear tank tubing into maneuvering the rear tank tubing into position.position. Failure to do so may damage the tubing Failure to do so may damage the tubing and make it difficult to attach the tubing to and make it difficult to attach the tubing to the fitting.the fitting. NOTICE NOTICE HYDROGEN RECEPTACLE INSPECTION AND REPLACMEMENT (RECALL 224) TSB #: 22-01-072H Page 24 of 25 SUBJECT: SUBJECT: 19. Open the manual valves on all 3 hydrogen tanks. Using a 6mm Allen wrench turn the manual valve counter-clockwise until it stops then rotate manual valve one half turn clockwise. Exceeding opening torque specification, may damage the manual valve. Opening Torque: 3.6 – 7.2 lb-ft (4.9 – 9.8 Nm) 20. Refer to Preparation for Replacement of Hydrogen Components on pages 12-13 and follow steps 1-4 in reverse order of disassembly to re-connect the high voltage safety plug and the 12-volt auxiliary battery. 21. Place the vehicle READY mode using the START / STOP push button. Some components of the manual valve Some components of the manual valve may be may be damaged if overdamaged if over–torqued.torqued. NOTICE NOTICE Manual valve Manual valve TPRD ( TPRD (DDO NOT O NOT disassemble)disassemble) Before performing the service procedure, Before performing the service procedure, ensure proper Personal Protection ensure proper Personal Protection Equipment (PPE) is worn to prevent Equipment (PPE) is worn to prevent injury. Verify PPE is not expired and in injury. Verify PPE is not expired and in proper working condition.proper working condition. WARNING WARNING HYDROGEN RECEPTACLE INSPECTION AND REPLACEMENT (RECALL 224) TSB #: 22-01-072H Page 25 of 25 SUBJECT: SUBJECT: 22. Perform a leak check of fittings on components replaced. Using a Hydrogen leak detector. Refer to shop manual: Nexo (FE) > 2019 > 113KW > Hydrogen Storage System > Repair Procedures> Hydrogen Gas Leak Test > For Hydrogen Storage System (HSS) If no leak is found, then replace the undercovers and proceed to the next step. If a leak is found. Perfom the Depleting Residual Fuel Supply Pressure Using GDS-M on pages 10-12 and Preparation for Replacement of Hydrogen Components on page12. Repair leaks, then perform steps 19-22 on pages 23-25. 23. Refuel hydrogen storage tanks to full at a local hydrogen station. Refer to the station websites below to confirm station availability before driving or towing vehicle to the station: • https://cafcp.org/stationmap • https://h2-ca.com/ 24. After refueling the vehicle, with the key in the ON positon, photograph the fuel gauge level and a paper showing the last six digits of the VIN or RO #, and the date of refueling. Using STUI, Using STUI, photograph the fuel gauge. photograph the fuel gauge. IIncludenclude in the photo ain the photo a piece of paper piece of paper containing the last 6 digits of the VIN or containing the last 6 digits of the VIN or the RO #, the date of the RO #, the date of the refuelingthe refueling. . Ensure the Ensure the fuel gauge display, ofuel gauge display, odometer, dometer, and note are and note are captured and captured and in focus.in focus. Upload the photo to STUI.Upload the photo to STUI. STUI STUI

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This notice applies to your Hyundai, VIN: XXXXXXXXXXXXXXXXX Dear This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Hyundai has decided that a defect, which relates to motor vehicle safety, exists in certain 2019 model year Nexo vehicles. Hyundai is initiating Recall Campaign 224, a safety recall to repair a condition involving the hydrogen fuel inlet receptacle in these vehicles in the U.S. market. Hyundai is conducting this action to ensure the safety of its vehicles for Hyundai customers. Our records indicate that your vehicle is affected by this recall campaign. What is the problem? Immediately following hydrogen refueling, the receptacle filter material could detach, impacting the sealing performance of the hydrogen refueling inlet receptacle and increasing the risk of a hydrogen fuel leak. A hydrogen fuel leak increases the risk of a vehicle fire while parked or driving. What will Hyundai do? Your Hyundai dealer will inspect the hydrogen fuel inlet receptacle and if necessary, replace it. This procedure will be performed at NO CHARGE to you. What should you do? Please contact your nearest Hyundai dealer to schedule this procedure by visiting www.HyundaiUSA.com/us/en/dealer-locator or calling 1-855-371-9460. The actual time required to perform this procedure on your vehicle will take less than one hour, however, your vehicle may be needed longer. Therefore, we recommend scheduling a service appointment to minimize inconvenience. Hyundai strongly recommends owners to park their vehicles outside and away from structures until the recall repair is complete. If you have other questions If you require further assistance, you may contact the Hyundai Customer Care Center at 1-855-371-9460. If you believe that the dealer or Hyundai has failed or is unable to remedy the defect without charge, or within a reasonable time, 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 go to https://www.safercar.gov. Thank you for your attention to this important safety matter. We apologize for any inconvenience this may have caused you. Hyundai Motor America Hyundai Motor America P.O. Box 20839 Fountain Valley, CA 92728-9937 IMPORTANT SAFETY RECALL 2019 Nexo Hydrogen Fuel Inlet Importante Retiro del Mercado por Motivos de Seguridad — Si tiene preguntas llama 1-800-633-5151 y oprima “8” NHTSA Recall Number: 22V-228 Hyundai Recall Number: 224 This is an important Safety Recall. • The recall will be performed on your vehicle at NO CHARGE to you. • Having this procedure completed will help reduce the risk of potential vehicle fire. • Owners are advised to park their vehicles outside and away from structures until the recall repair is complete. • Please contact your nearest Hyundai dealer to schedule this procedure as soon as possible. To locate your nearest dealer and schedule your appointment please visit: www.HyundaiUSA.com/Campaign224

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Recall 224: Hydrogen Receptacle Inspection and Replacement Dealer Best Practice September 08, 2022 Updates to this Document Date • Recall 224 – Remedy Available (TSB 22-01-072H) for inspection and replacement of the fuel injection line receptacle has been published 09/08/2022 Description of Campaign: Certain 2019MY NEXO (FE) vehicles may exhibit hydrogen gas leakage in the fuel injection line receptacle caused by parts out of specification. This bulletin outlines the procedures to inspect and if needed, replace the receptacle and fuel-line related parts if receptacle measurement is outside of specifications. Affected Vehicles: ⮚ Certain 2019MY NEXO (FE) vehicles produced between 08/10/2018 – 12/17/2018 by Hyundai Motor Company (“HMC”) • To check vehicle specific recall applicability, access the “Vehicle Information” screen via WebDCS. • For this recall, please note that there no new vehicles currently in dealer stock. Remedy Information: Inspect the receptacle and if needed, replace the receptacle & fuel-line related parts only if the vehicle DOES NOT pass the inspection. • Estimated Repair Time (Based on Warranty Time): 0.3 for inspection pass ONLY, 2.4 or 3.2 M/H if inspection does not pass and depending on fuel level of vehicle at time of repair. • Recommended Technician Training Level: Expert (or above) service technician that has successfully completed the Fuel Cell Electric Vehicle Training Instructor Led Training (SVCHFCEVTRAIN222_1097) Recall 224 TSB repair procedures MUST be performed at an authorized Hyundai NEXO fuel cell vehicle dealer and by a Hyundai Expert (or above level) technician who has successfully completed the Fuel Cell Electric Vehicle Training Instructor Led Training course (SVCHFCEVTRAIN222_1097). Claims submitted by Non-NEXO certified dealers will not be accepted by HMA. NOTICE Service Workflow: Inspect the Fuel Receptacle Did the inspection pass? No Is the Hydrogen tank pressure above 1,100PSI? Yes Yes Perform defueling for the vehicle if the tank pressure is No above 1,100PSI (Refer to TSB 22-FL-005H or latest for defueling process). Recall Complete Replace the receptacle and the 9 related parts. Replace the receptacle and the 9 related parts. Recall Complete Refuel the vehicle Recall Complete Recommended Alternative Transportation: It is recommended that the customer is provided with a Service Rental Car (SRC) during the inspection of the fueling receptacle. Best Practice Checklist Reservation: Did you check WebDCS for additional campaigns or recalls? ◻ Yes ◻ No Readiness: Are parts in stock to complete this campaign? ◻ Yes – Provide customer with ETA ◻ No – Contact parts and get ETA Reception: Did you explain to the customer the expected repair time based on the repair? ◻ Yes ◻ No Reception: Did you explain to customer the warranty requirements? ◻ Yes ◻ No Reception: Did you offer the customer Alternative Transportation? ◻ Yes ◻ No Repair: Did you provide the customer with an eMPI? ◻ Yes ◻ No Repair: Does the Technician meet the recommended training requirements to complete this recall/campaign? ◻ Yes ◻ No Return: Did you get the customer’s signature on all warranty lines in addition to the final RO? ◻ Yes ◻ No Parts: • The 7 part numbers ending in ‘QQH’ below are on Critical Supply Part (CSP) restriction; dealers require a valid recall VIN to order these parts. • The O-rings are available to order via normal procedure in WEBDCS. • Each certified NEXO dealer was shipped the O-Ring lubricant and the Hydrogen Receptacle Depth Gauge Kit on 09/06/22. Warranty: NOTE 1: Op codes 21D051R3 and 21D051R4 require defueling and refueling of the vehicle. Both include the following: • Labor time for the defueling process as outlined in a separate TSB 22-FL-005H (or latest) • $150 sublet ($50 to transport the vehicle to the fueling station + $100 for fuel to refuel) Please DO NOT submit a separate claim with duplicate labor or sublet for the items outlined above. NOTE 2: Submit claim on Campaign Claim Entry Screen. NOTE 3: If a part that is not covered by this recall needs replacement while performing this recall, and the affected part is still under warranty, submit a separate claim using the same repair order. If the part is out of warranty, submit a prior approval request for goodwill consideration prior to the work. NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center (WTC) parts return process. Claim is subject to debit if the part is requested and not returned. NOTE 5: Claim must include a STUI picture of the inspection procedure’s measurement that is clearly visible along with a piece of paper displaying the last 6 digits of the VIN and date of the measurement. If replacement of parts is required. **For Refueling: Refer to the station websites below to confirm station availability before driving or towing vehicle to the station: • https://cafcp.org/stationmap • https://h2-ca.com/ Customer FAQ: Q1: What is the issue? A1: Immediately following hydrogen refueling, the receptacle filter material could detach, impacting the sealing performance of the hydrogen refueling inlet receptacle and increasing the risk of a hydrogen fuel leak. Q2: What is the safety concern? A2: Hydrogen fuel leakage in the presence of a potential ignition source increases the risk of a fire. Q3: What are the affected vehicles? A3: Certain2019 model year Nexo vehicles produced by HMC from 08/10/2018 through 12/17/2018 for sale in the U.S. Q4: Have there been any accidents or injuries? A4: As of the date of this filing to NHTSA (04/12/22), Hyundai is only aware of one (1) incident in South Korea that resulted in a fire. Q5: What will be done during the recall service at the dealer? A5: Hyundai Motor America plans to notify owners of affected vehicles by first class mail with instructions to bring their vehicles to a Hyundai dealer to have the hydrogen fuel inlet receptacle inspected, and if necessary, have the receptacle and fuel-line related parts replaced. Owners may continue driving these vehicles; however, out of an abundance of caution, Hyundai recommends parking them outside and away from structures until the recall remedy is completed. This remedy will be offered at no cost to owners for all affected vehicles, regardless of whether the affected vehicles are still covered under Hyundai’s New Vehicle Limited Warranty. Additionally, Hyundai will provide owners of affected vehicles reimbursement for out-of-pocket expenses incurred to obtain a remedy for the recall condition in accordance with the reimbursement plan submitted to NHTSA on February 24, 2022. Q6: When will owners be notified? A6: Owners were previously notified of a remedy not available of their vehicle. Owners will now be notified of a remedy available for their vehicles in October 2022. Contact Reference Please see the following page for commonly referred to contacts. Thank you for your prompt attention to this important safety matter and continued commitment to Hyundai customers. Key Contact Information Dealer Support Contact Information Description Parts Techline Warranty HELPREP Line Warranty Prior Approval (PA) Center Xtime Technical Support AutoLoop Technical Support CDK Technical Support Customer Support Hyundai Customer Care Center (Recall /Campaign Questions) Hyundai Recall /Campaign Website Hyundai Customer Care Center (GeneralQuestions) Hyundai Roadside Assistance [email protected] 1-800-545-4515 1‐800‐325‐6604 1‐877‐446‐2922 [email protected] [email protected] 1‐866‐984‐6355 [email protected] 1-877-850-2010 https://serviceconnect.support.cdk. com/ Contact Information 1‐855‐671‐3059 www.hyundaiusa.com/recall 1‐800‐633‐5151 1-800-243-7766 Parts ordering hotline Vehicle Technical Support for Hyundai Dealer Technicians Warranty Claim questions for Hyundai Dealers Warranty Prior Approval (PA) Center for Hyundai Dealers Assistance with Car Care Scheduling: • Appointment / Shop Capacity Management / Campaign Integration / Operation Codes Assistance with Car Care Scheduling: • Appointment / Shop Capacity Management / Campaign Integration / Operation Codes Assistance with Car Care Scheduling: • Appointment / Shop Capacity Management / Campaign Integration / Operation Codes Description Customer questions or concerns related to recall or service campaigns Updated information related to the specific recall or service campaign Customers general questions, non‐campaign related Hyundai Roadside Assistance Key Reference Information Name Source Campaign Central Consolidated repository of recall and service campaign dealer best practices. Located on the service tab homepage in www.HyundaiDealer.com Car Care Scheduling (Xtime) – Tutorials Car Care Scheduling (Xtime) – Recall Appointment Notification Parts – Campaign Parts Management (CPM) Procedure Service Rental Car (SRC) Program Technical Service Bulletin (TSB) Uncompleted Campaign VIN Listing Recall Campaign Website NHTSAWebsite www.HyundaiDealer.com > Service > Dealer Resources > Documents Library > Car Care Scheduling 1. Log into Xtime 2. Under the menu at the top left, select ‘CONFIGURE’ 3. Under the dealership tab, click “EMAIL COMMUNICATION” 4. Slide the toggle to “ADVANCED” 5. Populate as many e-mails as desired in the “PARTS DESK EMAIL FIELD” As applicable; www.HyundaiDealer.com > Parts > Documents Library > Campaign Parts Management SRC Documentation: www.HyundaiDealer.com > Service tab > Documents Library > Service Rental Car TSD: www.HyundaiDealer.com > Service tab > SRC Fleet Mgmt Software Insurance: www.HyundaiDealer.com > Service tab > SRC Insurance www.HyundaiDealer.com > Service tab > Hyundai Tech Info A listing of vehicles is located on WEBDCS > SERVICE tab > select UNCOMPLETED CAMPAIGN VIN LISTING – Dealer Stock (New, SRC, CPO, etc.) and Retailed. www.hyundaiusa.com/recall www.safercar.gov Appendix Historical Reference Date • Remedy Not Available 04/12/2022

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-228 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Hyundai Motor America Submission Date : APR 14, 2022 NHTSA Recall No. : 22V-228 Manufacturer Recall No. : 224 Manufacturer Information : Manufacturer Name : Hyundai Motor America Address : 10550 Talbert Avenue Fountain Valley CA 92708 Company phone : 800-633-5151 Population : Number of potentially involved : 54 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2019 Hyundai Nexo Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : CNG/LPG Descriptive Information : Based on manufacturing records, the subject population for this recall includes certain 2019 model year Nexo vehicles produced by Hyundai Motor Company (“HMC”) within the specified production date range for sale in the U.S. Production Dates : AUG 10, 2018 – DEC 17, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Immediately following hydrogen refueling, the receptacle filter material could detach, impacting the sealing performance of the hydrogen refueling inlet receptacle and increasing the risk of a hydrogen fuel leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Hydrogen fuel leakage in the presence of a potential ignition source increases the risk of a fire. Description of the Cause : The supplier used a prototype epoxy-bonded filter in place of the original laserwelded filter specified by design. Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-228 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : RECEPTACLE ASSY-FILLING Component Description : HYDROGEN FUEL FILLING RECEPTACLE ASSEMBLY Component Part Number : 35950-M5000 Supplier Identification : Component Manufacturer Name : Motonic Corporation Address : 67, Seongjusaneopdanji-ro 3-gil Seongju-eup, Seongju-gun Gyeongsangbuk-do Foreign States 40031 Country : Korea, Republic of Chronology : March 2022 On March 16, 2022, HMC notified HMA’s NASO of an incident involving a 2019MY Nexo vehicle that caught fire after refueling at a hydrogen fueling station in South Korea. According to HMC’s analysis of the incident, material from the fuel inlet receptacle filter detached shortly after fueling was completed allowing hydrogen fuel to leak from the receptacle into the fuel filler compartment. The operator allegedly heard an abnormal noise from the rear of vehicle and opened the fuel filler door to investigate. Hyundai believes the vehicle operator’s hand discharged static electricity when making contact with the fueling cap, igniting the leaked hydrogen fuel and causing a fuel filler compartment fire. The fuel filler compartment fire was extinguished within seconds of detection by the refueling station fire suppression system. On March 21, 2022, HMC informed NASO that the supplier of the fuel inlet receptacle used a prototype epoxybonded filter in place of the design-specific laser-welded filter. Based on this information, on March 31, 2022, NASO convened its North America Safety Decision Authority and decided to conduct a new recall of affected Hyundai Nexo vehicles in the U.S. to address the defect condition involving the hydrogen fuel inlet receptacle filter. As of the date of this filing, Hyundai is only aware of the one (1) incident in South Korea that resulted in a fire. Part 573 Safety Recall Report 22V-228 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Owners can continue driving these vehicles; however, Hyundai recommends parking their vehicles outside and away from structures until the recall remedy is completed. Hyundai Motor America plans to notify owners of affected vehicles by first class mail with instructions to bring their vehicles to a Hyundai dealer to have the hydrogen fuel inlet receptacle replaced. This remedy will be offered at no cost to owners for all affected vehicles, regardless of whether the affected vehicles are still covered under Hyundai’s New Vehicle Limited Warranty. Additionally, Hyundai will provide owners of affected vehicles reimbursement for outof- pocket expenses incurred to obtain a remedy for the recall condition in accordance with the reimbursement plan submitted to NHTSA on February 24, 2022. How Remedy Component Differs from Recalled Component : The remedy receptacle assembly is produced with a laser-welded filter and meets the original design specification for use in the subject vehicles. Identify How/When Recall Condition was Corrected in Production : N/A Recall Schedule : Description of Recall Schedule : Dealers and owners will be notified in early June 2022. Planned Dealer Notification Date : JUN 06, 2022 – JUN 06, 2022 Planned Owner Notification Date : JUN 06, 2022 – JUN 06, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-228 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Hyundai Motor America Submission Date : APR 07, 2022 NHTSA Recall No. : 22V-228 Manufacturer Recall No. : 224 Manufacturer Information : Manufacturer Name : Hyundai Motor America Address : 10550 Talbert Avenue Fountain Valley CA 92708 Company phone : 800-633-5151 Population : Number of potentially involved : 54 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2019 Hyundai Nexo Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : CNG/LPG Descriptive Information : Based on manufacturing records, the subject population for this recall includes certain 2019 model year Nexo vehicles produced by Hyundai Motor Company (“HMC”) within the specified production date range for sale in the U.S. Production Dates : AUG 10, 2018 – DEC 17, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Immediately following hydrogen refueling, the receptacle filter material could detach, impacting the sealing performance of the hydrogen refueling inlet receptacle and increasing the risk of a hydrogen fuel leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Hydrogen fuel leakage in the presence of a potential ignition source increases the risk of a fire. Description of the Cause : The supplier used a prototype epoxy-bonded filter in place of the original laserwelded filter specified by design. Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-228 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : RECEPTACLE ASSY-FILLING Component Description : HYDROGEN FUEL FILLING RECEPTACLE ASSEMBLY Component Part Number : 35950-M5000 Supplier Identification : Component Manufacturer Name : Motonic Corporation Address : 67, Seongjusaneopdanji-ro 3-gil Seongju-eup, Seongju-gun Gyeongsangbuk-do Foreign States 40031 Country : Korea, Republic of Chronology : March 2022 On March 16, 2022, HMC notified HMA’s NASO of an incident involving a 2019MY Nexo vehicle that caught fire after refueling at a hydrogen fueling station in South Korea. According to HMC’s analysis of the incident, material from the fuel inlet receptacle filter detached shortly after fueling was completed allowing hydrogen fuel to leak from the receptacle into the fuel filler compartment. The operator allegedly heard an abnormal noise from the rear of vehicle and opened the fuel filler door to investigate. Hyundai believes the vehicle operator’s hand discharged static electricity when making contact with the fueling cap, igniting the leaked hydrogen fuel and causing a fuel filler compartment fire. The fuel filler compartment fire was extinguished within seconds of detection by the refueling station fire suppression system. On March 21, 2022, HMC informed NASO that the supplier of the fuel inlet receptacle used a prototype epoxybonded filter in place of the design-specific laser-welded filter. Based on this information, on March 31, 2022, NASO convened its North America Safety Decision Authority and decided to conduct a new recall of affected Hyundai Nexo vehicles in the U.S. to address the defect condition involving the hydrogen fuel inlet receptacle filter. As of the date of this filing, Hyundai is only aware of the one (1) incident in South Korea that resulted in a fire. Part 573 Safety Recall Report 22V-228 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Hyundai Motor America plans to notify owners of affected vehicles by first class mail with instructions to bring their vehicles to a Hyundai dealer to have the hydrogen fuel inlet receptacle replaced. This remedy will be offered at no cost to owners for all affected vehicles, regardless of whether the affected vehicles are still covered under Hyundai’s New Vehicle Limited Warranty. Additionally, Hyundai will provide owners of affected vehicles reimbursement for out-of-pocket expenses incurred to obtain a remedy for the recall condition in accordance with the reimbursement plan submitted to NHTSA on February 24, 2022. How Remedy Component Differs from Recalled Component : The remedy receptacle assembly is produced with a laser-welded filter and meets the original design specification for use in the subject vehicles. Identify How/When Recall Condition was Corrected in Production : N/A Recall Schedule : Description of Recall Schedule : Dealers and owners will be notified in early June 2022. Planned Dealer Notification Date : JUN 06, 2022 – JUN 06, 2022 Planned Owner Notification Date : JUN 06, 2022 – JUN 06, 2022 * NR – Not Reported

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