Recall 248 – Software Error May Cause Unintended Acceleration – 2021-2023 Hyundai Elantra HEV

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-589 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Hyundai Motor America Submission Date : AUG 18, 2023 NHTSA Recall No. : 23V-589 Manufacturer Recall No. : 248 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 : 37,997 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2021-2023 Hyundai Elantra HEV Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : HYBRID ELECTRIC Descriptive Information : The subject population includes 37,997 model year 2021-2023 Hyundai Elantra Hybrid vehicles produced on the specified dates by Hyundai Motor Company (“HMC”) for sale in the U.S. market. Production Dates : DEC 15, 2020 – JUL 29, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The motor control unit (“MCU”) software may detect a transmission / drive motor synchronization fault while driving triggering a “fail-safe” condition that temporarily results in slow, unintended acceleration after release of the brake pedal. Service brake functionality is unaffected and remains fully operational. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Unintended acceleration could increase the risk of a crash at certain vehicle speeds. Description of the Cause : Inadvertent fault detection by the HPCU software logic. Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 23V-589 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : HPCU RESERVOIR MODULE Component Description : HYBRID POWER CONTROL UNIT RESERVOIR MODULE Component Part Number : 36600-2BBB0 Component Name 2 : HPCU RESERVOIR MODULE Component Description : HYBRID POWER CONTROL UNIT RESERVOIR MODULE Component Part Number : 36600-2BBB1 Supplier Identification : Component Manufacturer Name : Hyundai Mobis Address : 203, Teheran-ro Gangnam-gu Seoul Foreign States Country : Korea, Republic of Chronology : Please see Attachment A. Description of Remedy : Description of Remedy Program : Owners can continue driving these vehicles as the vehicle’s brake systems are fully operational and effective in slowing the vehicle. As an added level of protection, all affected vehicles are equipped with brake override systems as a standard feature. All owners of the subject vehicles will be notified by first class mail with instructions to bring their vehicles to a Hyundai dealer to update the logic in the Motor Control Unit (“MCU”). 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. Part 573 Safety Recall Report 23V-589 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 How Remedy Component Differs from Recalled Component : The MCU software logic is improved. Identify How/When Recall Condition was Corrected in Production : The updated MCU’s (with improved software) were implemented on August 10, 2023, as a production running change. Recall Schedule : Description of Recall Schedule : Dealers/owners will be notified on the specified dates. Planned Dealer Notification Date : OCT 17, 2023 – OCT 17, 2023 Planned Owner Notification Date : OCT 17, 2023 – OCT 17, 2023 * NR – Not Reported

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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 23-01-070H DATE MODEL(S) AUGUST 2023 ELANTRA HYBRID (CN7 HEV) SUBJECT: MOTOR CONTROL UNIT (MCU) SOFTWARE UPDATE (RECALL CAMPAIGN 248) Description: This bulletin provides information related to a Motor Control Unit (MCU) software update for Elantra Hybrid (CN7 HEV) vehicles. The MCU software may detect a transmission / drive motor synchronization fault triggering a “fail-safe” condition that temporarily results in slow, unintended acceleration following brake pedal release while driving. Brake operation is not affected and remains fully operational and effective to slow the vehicle. Unintended acceleration could increase the risk of a crash. Applicable Vehicles: • 2021-2023MY Elantra Hybrid (CN7 HEV) equipped with 1.6L GDI engine produced 12/15/2020-07/29/2023 GDS Information: System Selection: MCU *Event # Description 1025 CN7 HEV WARNING LIGHTS AND SLOW ACCELERATION IMPROVING UPGRADE * or use a later available event as listed in the GDS update screen, if one is available. Vehicle repairs related to safety recalls are critically important and must be performed properly in accordance with TSB procedures. Review this bulletin in its entirety prior to beginning any repair work. As required by federal law, dealers must not deliver new vehicles for sale or for lease to customers until all open recalls have been performed. Dealers must also perform all open recalls on used vehicles, demo, and rental vehicles prior to placing them into customer use and whenever an affected vehicle is in the shop for any maintenance or repair. Access the “Vehicle Information” screen via WEBDCS to identify open recalls.  IMPORTANT MOTOR CONTROL (MCU) SOFTWARE UPDATE (RECALL CAMPAIGN 248) TSB #: 23-01-070H Page 2 of 3 SUBJECT: SUBJECT: Warranty Information: MODEL OP CODE OPERATION OP TIME CAUSAL PART NATURE CODE CAUSE CODE Elantra Hybrid (CN7 HEV) 31D097R0 MCU Upgrade 0.3 M/H 36600-2BBB0 I14 ZZ3 NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type. NOTE 2: If a part is found in need of replacement while performing this recall and the affected part is still under warranty, submit a separate claim using the same repair order. If the affected part is out of warranty, submit a Prior Approval request for goodwill consideration prior to performing the work. NOTE 3: This TSB includes Repair validation photos. Op times include VIN, Mileage and Repair validation photos as outlined in the Digital Documentation Policy. Service Procedure: MCU Update and ROM Information Table: EVENT MODEL ENGINE MCU P/N ROM ID OLD NEW #1025 Elantra Hybrid (CN7 HEV) Gamma 1.6 GDI 36600-2BBB0 36600-2BBB1 GCNDH21ABMS0-000 GCNDH23NBMS1-000 You must initially perform GDS MCU Updates #1025 in Auto Mode. If the MCU Update starts but then fails in Auto Mode, perform the update in Manual Mode to recover. Information i 1.Verify the vehicle battery has reasonable charge. 2.Turn off all lamps (Do not leave head lamp switch in auto mode.), and all accessories. 3.Perform update with the ignition switch in the ON position. 4.Do not disconnect any cables connected to the vehicle or scan tool during update. 5.Do not start the engine during update. 6.Do not turn off the ignition switch during update. Information i This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation Policy for requirements. STUI MOTOR CONTROL (MCU) SOFTWARE UPDATE (RECALL CAMPAIGN 248) TSB #: 23-01-070H Page 3 of 3 SUBJECT: SUBJECT: Manual Update: If the MCU Update starts but then fails in auto mode, perform the update in Manual Mode to recover. *Event # MENU Password 1025 CN7 HEV WARNING LIGHTS AND SLOW ACCELERATION IMPROVING UPGRADE 3660 GDS-M Vehicle Battery Low Voltage Warning: When the vehicle battery is lower than 12 volts, the GDS-M will trigger a Low Battery Voltage Warning. If this Warning occurs, A. Connect the battery to a fully charged battery jump pack or GR8 charger using “Power Supply Mode” to continue the software update. OR B. Select “BACK” to exit the SW update. Then, start the engine and idle with the headlights on for 20 minutes. Return to the SW update after charging the battery. Failure to do either one of these steps can cause the vehicle battery to die during the update, causing the vehicle to become inoperable. NOTICE Take a screenshot of the MCU Update Complete screen using your particular tablet’s screenshot save method and upload to STUI. STUI

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1 Recall 248: Motor Control Unit (MCU) Software Update – Dealer Best Practice August 22, 2023 Document Topic Date • Remedy Available – Technical Service Bulletin (TSB) 23-01-070H published on 08/17/2023 08/22/2023 Recall Description The motor control unit (“MCU”) software may detect a transmission / drive motor synchronization fault while driving which can trigger a “fail-safe” condition that temporarily results in slow, unintended acceleration after release of the brake pedal. Service brake functionality is unaffected and remains fully operational. Unintended acceleration could increase the risk of a crash. Applicable Vehicles (Certain) • 2021-23MY Elantra Hybrid (CN7 HEV) equipped with 1.6L GDI engines produced 12/15/2020 – 07/29/2023 Remedy Information • Required GDS Information Selection: System: MCU, Event # 1025 • Recommended Service Technician Training Level: Hyundai Certified (or above) TSB 23-01-070H (or latest version) provides information related updating the Motor Control Unit (MCU) software on the vehicle via the Hyundai GDS. Recommended Alternative Transportation A Service Rental Vehicle (SRC) should be provided to customers who do not feel safe operating their vehicle until the open recall has been completed. In addition, a SRC may be required based on the recall repair procedure duration and any other additional work on the vehicle that may need to be addressed during customer’s visit. If a SRC is not available, other options such as a 3rd Party Rental or Rideshare may be provided. Warranty Information • This recall campaign pays 0.3 M/H for updating the MCU via the GDS and taking a repair validation photo that software update was completed. • Photos: Please refer to TSB 23-01-070H (or latest version) for repair validation sample photo(s) and additional details regarding specific digital documentation requirements. IMPORTANT: As required by federal law, dealers must not deliver new vehicles for sale or for lease to customers until all open recalls have been performed. Dealers must perform all open recalls on used vehicles, demo, and rental vehicles prior to placing them into customer use and whenever an affected vehicle is in the shop for any maintenance or repair. To check vehicle specific recall applicability, access the “Vehicle Information” screen via WebDCS. Parts Information There are no parts required for this recall campaign’s service procedure. Sample Customer Talk Tracks 1. “We will update your vehicle’s Motor Control Unit. Potentially, the vehicle’s speed could temporarily, slowly increase after release of the brake pedal. This recall service procedure will be performed at no cost to you. Please note that your vehicle’s brake operation is not affected and will remain fully operational. If necessary, we would like to offer you an SRC while we perform this recall and any other related work that your vehicle may require. We apologize for the severe inconvenience. “ 2. “As a courtesy, I checked your vehicle for any open service campaigns or recalls and found that your vehicle has an open recall related to the Motor Control Unit. The recall addresses a potential condition where the vehicle’s speed could temporarily, gradually increase after release of the brake pedal. We will provide a software update to address this situation at no cost to you. Please note that the vehicle’s brake operation is not affected and will remain fully operational.” Best Practice Checklist Reservation: Did you check WebDCS for additional campaigns or recalls? □ Yes □ No – Please ensure all open campaign(s)/recall(s) are identified and completed by the dealership if remedy/repair(s) are available. Reception: Did you explain to the customer the expected repair time based on the repair and set the expectation for a status update? □ Yes □ No – Customer should be given an estimated time of when his/her vehicle is completed so the customer can plan the rest of their day away from the dealership. Did you offer the customer Alternative Transportation? □ Yes □ No – Customer should be offered if they feel uncomfortable in the operation of their vehicle prior to the remedy being completed on his/her vehicle. In addition, a SRC may be required based on the recall repair procedure duration and any other additional work on the vehicle that may need to be addressed during customer’s visit. Repair: Did you provide the customer with an eMPI? □ Yes □ No Does the Technician meet the recommended training requirements (certified level or above) to complete this recall/campaign? □ Yes □ No – Please ensure a technician with a certified level (or higher) completes this repair as it is a critical safety recall. Were the appropriate picture(s) taken as outlined in TSB 23-01-070H (or latest version)? 2 □ Yes □ No – Please ensure appropriate picture(s) are taken for the dealership to be paid. See TSB 23-01-070H (or latest version) for sample photos. Refer to the latest Warranty Digital Documentation Policy for requirements. Return: Did you get the customer’s signature on all warranty lines in addition to the final RO? □ Yes □ No Customer FAQ Q1: What is the issue? A1: The motor control unit (“MCU”) software may detect a transmission / drive motor synchronization fault while driving which can trigger a “fail-safe” condition that temporarily results in slow, unintended acceleration after release of the brake pedal. Service brake functionality is unaffected and remains fully operational. Q2: What are the affected vehicles? A2: Certain 2021-23MY Elantra Hybrid (CN7 HEV) equipped with 1.6L GDI engines produced 12/15/2020 – 07/29/2023 Q3: What is the safety concern? A3: Unintended acceleration could increase the risk of a crash. Q4: Have there been any accidents or injuries? A4: As of the date of this filing (08/18/23), there are no related crashes, injuries, fires, or reported incidents in the U.S and Canada. Q5: Will a Dealer Stop Sale or Port Hold be issued? A5: Dealer: A dealer “stop sale” has been issued in accordance with federal regulation for affected vehicles unsold at dealers. Port: A port hold has been placed for affected vehicles at the ports/vehicle processing centers. Q6: What will be done during the recall service at the dealer? A6: Owners can continue driving these vehicles as the vehicle’s brake systems are fully operational and effective in slowing the vehicle. As an added level of protection, all affected vehicles are equipped with brake override systems as a standard feature. All owners of the subject vehicles will be notified by first class mail with instructions to bring their vehicles to a Hyundai dealer to update the logic in the Motor Control Unit (“MCU”). 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. Q7: When will owners be notified? A7: Owners of the subject vehicles will be notified via First Class mail in mid-October 2023. Contact Reference Thank you for your prompt attention to this safety matter and continued commitment to Hyundai customers. Please see the list below of commonly referred to contacts. 3 4 Key Contact Information Dealer Support Contact Information Description Parts Techline Warranty HELPREP Line Warranty Prior Approval (PA)Center Xtime Technical Support [email protected] 1-800-545-4515 1‐800‐325‐6604 1‐877‐446‐2922 [email protected] [email protected] 1‐866‐984‐6355 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 / ShopCapacity Management / Campaign Integration / OperationCodes AutoLoop Technical Support [email protected] 1-877-850-2010 Assistance with Car Care Scheduling: • Appointment / ShopCapacity Management / Campaign Integration / OperationCodes CDK Technical Support Customer Support HyundaiCustomer Care Center (Recall/Campaign Questions) HyundaiRecall /Campaign Website Hyundai Customer Care Center(GeneralQuestions) HyundaiRoadside Assistance https://serviceconnect.support.cdk.com/ Contact Information 1‐855‐671‐3059 www.hyundaiusa.com/recall 1‐800‐633‐5151 1-800-243-7766 Assistance with Car Care Scheduling: • Appointment / ShopCapacity Management / Campaign Integration / OperationCodes 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 HyundaiRoadside 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 www.HyundaiDealer.com > Service > Dealer Resources > DocumentsLibrary > Car Care Scheduling Car Care Scheduling(Xtime) -Recall Appointment Notification 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 EMAILFIELD” Parts – Campaign Parts Management (CPM) Procedure Service Rental Car (SRC)Program Technical Service Bulletin (TSB) Uncompleted Campaign VIN Listing Recall Campaign Website NHTSAWebsite 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

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