Recall 239 Coolant Leak in EPCU May Cause Loss of Drive Power – 2021 Hyundai Kona EV

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-941 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Hyundai Motor America Submission Date : DEC 16, 2022 NHTSA Recall No. : 22V-941 Manufacturer Recall No. : 239 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 : 853 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2021-2021 Hyundai Kona EV Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : HYBRID ELECTRIC Descriptive Information : The subject population includes 853 model year 2021 Hyundai Kona EV vehicles produced on June 18, 2020, through July 31, 2020, by Hyundai Motor Company (“HMC”) for sale in the U.S. market. Production Dates : JUN 18, 2020 – JUL 31, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The Electric Power Control Unit (“EPCU”) used in the subject vehicles may have been produced by the supplier with insufficient sealing of the EPCU’s DC-DC convertor housing potentially causing an internal coolant leak and contamination of the EPCU main controller. Contamination of the EPCU controller could result in triggering of the vehicle’s limited mobility “fail safe” drive mode or, in limited instances, a sudden loss of motive power or vehicle stall. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A sudden loss of motive power or stall could increase the risk of a crash at certain speed. Description of the Cause : The EPCU’s DC-DC convertor housing was insufficiently sealed due to inadequate steam cleaning during manufacturing. Identification of Any Warning A. Malfunction Indicator Lamp (“MIL”) illumination B. “Check Electric Vehicle System” warning message on information Part 573 Safety Recall Report 22V-941 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 that can Occur : display Involved Components : Component Name 1 : EPCU ASSY Component Description : Electric Power Control Unit Assembly Component Part Number : 36601-0E170 Supplier Identification : Component Manufacturer Name : Hyundai Mobis Address : 203 Teheran-ro Gangnam-gu Seoul Foreign States 06141 Country : Korea, Republic of Chronology : Please see Attachment A for the requested chronology of events leading up to the defect decision. Description of Remedy : Description of Remedy Program : All owners of the subject vehicles will be notified by first class mail with instructions to bring their vehicles to a Hyundai dealer to inspect the EPCU and replace it, if necessary. 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 remedied EPCU’s DC-DC convertor is produced with sufficient sealing to prevent leakage. Identify How/When Recall Condition was Corrected in Production : The duration of the steam cleaning process was revised on July 6, 2020, at the supplier. Part 573 Safety Recall Report 22V-941 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : Dealers and owners will be notified in accordance with the specified dates. Planned Dealer Notification Date : FEB 14, 2023 – FEB 14, 2023 Planned Owner Notification Date : FEB 14, 2023 – FEB 14, 2023 * NR – Not Reported

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Recall 239: Electric Power Control Unit Remedy Not Available – Dealer Best Practice December 20, 2022 Recall Description: The Electric Power Control Unit (“EPCU”) used in the subject vehicles may have been manufactured with insufficient sealing of the EPCU’s DC-DC convertor housing potentially causing an internal coolant leak and contamination of the EPCU main controller. Contamination of the EPCU controller could result in triggering of the vehicle’s limited mobility “fail safe” drive mode or, in limited instances, a sudden loss of motive power or vehicle stall. Affected Vehicles: • Certain 2021MY Kona Electric (OS EV) produced from 06/18/2020 through 07/31/2020 • To check vehicle specific recall applicability, access the “Vehicle Information” screen via WebDCS. Remedy Information: The remedy is currently under development and additional information will be provided once it has been developed for release. Training recommendations will also be made available when the remedy is ready. Recommended Alternative Transportation: A Service Rental Car (SRC) should be provided if the customer does not feel safe operating their vehicle until the remedy has been performed. Customer Talk Tracks “The electronic power control unit in your vehicle may leak coolant internally due to insufficient sealing. If this were to occur the malfunction indicator light (MIL) may illuminate, the vehicle may go into limp mode or lose power. This unexpected loss of power may result in a crash, especially at high speeds. Once a remedy is available Hyundai will notify you via First Class mail advising you to bring your vehicle to a Hyundai dealership to have it applied at no cost to you.” Best Practice Checklist Reservation: Did you check WebDCS for additional campaigns or recalls? □ Yes □ No Reception: Did you offer the customer a Service Rental Car (SRC) if they do not feel comfortable operating their vehicle until a remedy becomes available? □ Yes □ No Parts: The parts information section will be updated once a remedy becomes available. Warranty: The warranty information section will be updated once a remedy becomes available. Updates to this Document Date • Recall 239: Electric Power Control Unit – Remedy Not Available 12/20/2022 Customer FAQ: Q1: What is the issue? A1: The Electric Power Control Unit (“EPCU”) used in the subject vehicles may have been manufactured with insufficient sealing of the EPCU’s DC-DC convertor housing potentially causing an internal coolant leak and contamination of the EPCU main controller. Contamination of the EPCU controller could result in triggering of the vehicle’s limited mobility “fail safe” drive mode or, in limited instances, a sudden loss of motive power or vehicle stall. Q2: What are the affected vehicles? A2: Certain 2021 Hyundai Kona EV vehicles produced from June 18, 2020, through July 31, 2020, by Hyundai Motor Company (“HMC”) for sale in the U.S. market. Q3: What is the safety concern? A3: A sudden loss of motive power or stall could increase the risk of a crash especially at high speeds. Q4: Have there been any accidents or injuries? A4: As of the date of this filing, Hyundai has confirmed 3 unique incidents reporting a loss of motive power in the U.S. received from January 2, 2021, through July 6, 2021, in the U.S. There are no confirmed crashes or injuries related to this condition. Q5: Stop Sale? A5: No, a “stop sale” is not being planned as the affected vehicles are no longer in production. Q6: What will be done during the recall service at the dealer? A6: Once an official remedy is available, all owners of the subject vehicles will be notified by first class mail with instructions to bring their vehicles to a Hyundai dealer to have the remedy completed free of charge, regardless of whether the affected vehicles are still covered under Hyundai’s New Vehicle Limited Warranty. 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. Q7: When will owners be notified? A7: Owners will be notified in February 2023. 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 HyundaiPartsHotline@MobisUSA.com 1-800-545-4515 1‐800‐325‐6604 1‐877‐446‐2922 PA@hmausa.com Support@xtime.com 1‐866‐984‐6355 Support@autoloop.com 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 • Recall 239 Electric Power Control Unit – Remedy Not Available 12/20/2022

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