Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
26-GI-002H TSB
Service Bulletin/Repair Instructions
This bulletin provides information related to the navigation and head unit software changes introduced in the 2026 1st Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2026 1st Navigation Map and Software Update Key Improvements and Additional Improvements tables in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater (NAU) and updated by USB.
DTN DCS
Other
The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding dangerous, counterfeit driver‑side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety System Co., Ltd. (DTN), that have been identified in U.S. vehicles following prior crashes, theft, or non‑certified airbag replacements. These inflators are not approved for use, may rupture during deployment, and have caused serious injuries and fatalities. Please see attached announcement, provided by NHTSA, for more details.
DTN DL
Other
The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and dangerous driver’s-side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety System Co., Ltd. (DTN). These inflators were not supplied, approved, or authorized by the vehicle manufacturers and have primarily been found in vehicles that previously experienced a crash and underwent airbag replacement using non-genuine parts. These dangerous inflators have ruptured during deployment, posing a serious risk of injury or death due to metal fragments entering the vehicle cabin. To date, Hyundai is aware of three people who have died while driving a Hyundai vehicle with one of these substandard replacement airbag inflators that deployed in what likely would have been a survivable crash. NHTSA has issued a public advisory urging vehicle owners and service professionals to have vehicles inspected if there is reason to believe that a non-genuine replacement airbag may have been installed. Vehicles with salvage or rebuilt titles, prior airbag deployments, or unknown repair histories may present a higher risk. NHTSA strongly cautions against self-inspection by vehicle owners and recommends inspection by trained technicians.
26-AD-001H TSB
Service Bulletin/Repair Instructions
Some 2019MY and newer vehicles equipped with a front view camera may illuminate certain warning lights and trigger DTC C272246 fault code for the front camera. In the following cases, the front camera auto-calibration range may be exceeded while driving: • If the front camera is not properly installed and is completely or partially detached. • In case of excessive changes affecting the vehicle's balance (e.g., loading excessively heavy cargo in a specific location of the vehicle, or significant under-inflation of the tires). • Specific road conditions affecting the vehicle's balance (e.g., excessive road crown) This TSB provides instructions on how to service the vehicle when the front camera related warning light(s) are triggered due to system out of calibration (DTC_C272246).
26-HA-001H TSB
Service Bulletin/Repair Instructions
Some Elantra (CN7/CN7A), Elantra N (CN7 N) and Elantra Hybrid (CN7 HEV) vehicles may experience the following conditions: • Lack of airflow coming from the forward-facing center vents • Mode actuator not changing airflow direction after various inputs • Popping/snap noise when switching between different modes If any of the conditions above exist, follow the repair procedure in this bulletin to replace the ventilator lever and cam mode guide.
25-BD-012H TSB
Service Bulletin/Repair Instructions
This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes or during normal driving operation.
25-BE-020H TSB
Service Bulletin/Repair Instructions
This bulletin provides information related to the changes introduced in the 2025 1st Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system as described in this TSB.
25-01-010H-1 9B4 OL
Service Campaign
Certain Hyundai vehicles may exhibit a warning light with Diagnostic Trouble Code (“DTC”) P1BB20 due to a battery over voltage condition.
25-01-010H-1 DN
Service Campaign
Certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles may exhibit a warning light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards.
25-01-010H-1 TSB
Service Campaign
This bulletin provides the procedure to update the software for the Battery Management System (BMS) on certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB200 and enter Limp Mode.
25-01-045H TSB
Service Campaign
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
25-BE-005H-2 OL
Warranty Program/Extension
Certain 2021 – 2025 model year Elantra, 2022 – 2025 model year Elantra N and 2021 – 2025 model year Elantra Hybrid vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the Horn Assembly under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use, and is valid for original and subsequent owner.
25-BE-005H-2 DN
Warranty Program/Extension
Certain Hyundai Elantra (CN7) non N-Line and N-Line, Elantra (CN7A), Elantra (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners.
25-BE-005H-2 TSB
Warranty Program/Extension
Certain Elantra (CN7) non-N-Line and N-Line, Elantra (CN7A), Elantra N (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners.
25-BE-002H TSB
Service Bulletin/Repair Instructions
This bulletin provides information related to the changes introduced in the 2024 2nd Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2024 2nd Navigation Map and Software Update Improvements section in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater (NAU) and updated by USB. The NAU website is https://update.hyundai.com/US/EN/navigationUpdate. For certain models equipped with a relevant Bluelink package, the software may be downloaded and applied via OTA update.
25-01-024H-1 TSB
Service Campaign
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connection via the AVN pinhole reset method.
25-BE-005H-1 DN
Warranty Program/Extension
Certain Hyundai Elantra (CN7) non N-Line and N-Line, Elantra (CN7A), Elantra (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners. Please note that any vehicles under 10 years/120,000 miles are covered by this TSB, even if vehicle is within original warranty of 5 years/60,000 miles.
25-BE-005H-1 TSB
Warranty Program/Extension
Certain Elantra (CN7) non-N-Line and N-Line, Elantra (CN7A), Elantra N (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners. If a horn needs to be replaced, follow the instructions within this TSB to install the latest design. Please note that any vehicles under 10 years/120,000 miles are covered by this TSB, even if vehicle is within original warranty of 5 years/60,000 miles.
25-01-024H EM
Service Campaign
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon's communication network. If you are experiencing issues with remote commands, or other Bluelink services, please see the instructions below to reestablish the connection via the AVN pinhole reset method.
25-BE-005H DN
Warranty Program/Extension
Certain Hyundai Elantra (CN7), Elantra (CN7A), and Elantra Hybrid (CN7 HEV) vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners.
25-BE-005H TSB
Warranty Program/Extension
Certain Elantra (CN7), Elantra (CN7A), and Elantra Hybrid (CN7 HEV) vehicles may experience an inoperable horn. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners. If a horn needs to be replaced, follow the instructions within this TSB to install the latest design.
25-01-003H OL
Service Campaign
Certain Elantra Hybrid vehicles may exhibit a condition where the cruise control setting speed increases without input from the driver. This may occur when the HCU misinterprets the signal from the Cruise Control system.
25-01-010H DN
Service Bulletin/Repair Instructions
Certain Elantra hybrid (CN7 HEV), Sonata hybrid (DN8 HEV), and Tucson hybrid (NX4 HEV) vehicles may exhibit a warning light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). Follow the procedure in TSB 25-01-010H (or latest version) to perform the update the Battery management System (BMS) software.
25-01-010H TSB
Service Campaign
This bulletin provides the procedure to update the software for the Battery Management System (BMS) on certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB20.
25-01-003H DBP
Service Campaign
Certain Elantra Hybrid (CN7 HEV) vehicles may exhibit an intermittent condition where the cruise control set speed could gradually increase when the driver releases the cruise control set speed adjustment switch. The cruise control set speed is clearly displayed on the instrument cluster, provides visual indication to the driver when the set speed is adjusted, and remains adjustable by the driver at all times. The cruise control can be cancelled by normal methods, either by pressing the cruise control switch or depressing the brake pedal. The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards.
25-01-003H TSB
Service Campaign
Certain Elantra Hybrid (CN7 HEV) vehicles may exhibit an intermittent condition where the cruise control set speed could gradually increase when the driver releases the cruise control set speed adjustment switch. The cruise control set speed is clearly displayed on the instrument cluster, provides visual indication to the driver when the set speed is adjusted, and remains adjustable by the driver at all times. The cruise control can be cancelled by normal methods, either by pressing the cruise control switch or depressing the brake pedal. Follow the procedure in this bulletin to update the Hybrid Control Unit Low Voltage DC/DC Converter (HCULDC) system software to resolve this condition.
24-01-045H-2
Service Campaign
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
24-01-045H-1
Service Campaign
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
24-BE-001H-1
Service Bulletin/Repair Instructions
Some vehicles equipped with the AVN 5th Gen Wide system may exhibit a condition where the radio app crashes frequently when entering radio mode and/or displays a message that reads “Uneven Road Ahead, Drive carefully” on the cluster along with a warning sound. Follow the procedure outlined in this bulletin to update the AVN software to resolve this condition.
24-01-054H
Service Campaign
Certain Elantra hybrid (CN7 HEV), Sonata hybrid (DN8 HEV), and Tucson hybrid (NX4 HEV) vehicles may exhibit a warning light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). Follow the procedure in TSB 24-01-054H (or latest version) to perform the update the Battery management System (BMS) software.
SERVICE CAMPAIGN 9B4
Service Bulletin/Repair Instructions
This bulletin provides the procedure to update the software for the Battery Management System (BMS) on certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB20.
24-01-045H
Service Bulletin/Repair Instructions
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
24-01-042H
Service Bulletin/Repair Instructions
Some 2023MY Elantra N (CN7 N) and 2023-2024MY Elantra Hybrid (CN7 HEV) vehicles may have sealant leakage in the Tire Mobility Kit (TMK). The leakage may contaminate other parts inside or outside of the TMK bag. Follow the procedure in this bulletin to determine if the sealant is leaking and, if necessary, replace any parts that have been contaminated. If the sealant has not leaked, replace only the TMK Sealant Cap.
24-BD-001H
Service Bulletin/Repair Instructions
This bulletin contains information about the proper removal of the windshield wiper blade protective cover on all models. If the protective cover is not removed correctly, there is a possibility of the rubber insert and rail spring becoming partially separated on the inner side of the wiper blade, which could lead to poor wiping performance and/or possible scratching of the windshield glass. Follow the procedure in this bulletin to properly remove the windshield wiper blade protective cover on all new wiper blades.
24-BE-001H
Service Bulletin/Repair Instructions
Some vehicles equipped with the AVN 5th Gen Wide system may exhibit a condition where the radio app crashes frequently when entering radio mode and/or displays a message that reads âUneven Road Ahead, Drive carefullyâ on the cluster along with a warning sound. Follow the procedure outlined in this bulletin to update the AVN software to resolve this condition.
23-EM-005H
Service Bulletin/Repair Instructions
This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
23-BE-007H
Service Bulletin/Repair Instructions
This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaiâs Navigation Updates page. The current version of Google Maps has 10 times the data transmission compared to the previous version. As a countermeasure, an update with a frame skip logic has been added to resolve the data congestion with Google Maps.
23-BD-007H
Service Bulletin/Repair Instructions
Hyundai applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships. It provides a barrier between the paint and contaminants, such as rail dust, acid rain, and industrial fallout. In rare cases, the paint can become clouded under the PPF. These spots are the result of moisture trapped between the PPF and the paint.
23-01-016H
Service Bulletin/Repair Instructions
Certain 2022-23MY Elantra (CN7/CN7a), 2022-23MY Elantra N (CN7 N), and 2023MY Elantra Hybrid (CN7 HEV) vehicles normally equipped with two (2) complete Smart Key FOBs were delivered with only one (1) complete Smart Key FOB and one additional mechanical key. A second Smart Key FOB can now be provided to the customer. Please refer to TSB 23-01-016H (or latest version) for parts and programming information.
23-BD-002H
Service Bulletin/Repair Instructions
This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes or during normal driving operation.
22-EM-010H
Service Bulletin/Repair Instructions
Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or sub-assembly replacement.
22-GI-006H
Service Bulletin/Repair Instructions
Effective June 2, 2008, Federal Motor Vehicle Safety Standard 110 (FMVSS 110) established a threshold for correcting load carrying capacity information indicated on tire placards when vehicle weight has been increased before retail sale. This limit is the lesser of 1.5% of GVWR or 100 pounds. If the total added weight exceeds the lesser of the limit, a label must be added to the driver-side B-pillar within 25mm (1 inch) of the original tire placard.
22-01-054H
Service Bulletin/Repair Instructions
Certain Elantra (CN7/CN7a), Elantra N (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles normally equipped with two (2) Smart Key FOBs will receive only one (1) Smart Key FOB and one additional mechanical key, per vehicle, until further notice. A second Smart Key FOB, per vehicle, will be provided at a later date.
22-EM-009H
Service Bulletin/Repair Instructions
Certain Elantra (CN7/CN7a), Elantra N (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles normally equipped with two (2) Smart Key FOBs will receive only one (1) Smart Key FOB and one additional mechanical key, per vehicle, until further notice. A second Smart Key FOB, per vehicle, will be provided at a later date.
988DBP
Service Bulletin/Repair Instructions
Certain 22-23MY Elantra (CN7/CN7a), Elantra N (CN7 N), and Elantra Hybrid (CN7 HEV) vehicles normally equipped with two (2) Smart Key FOBs will receive only one (1) Smart Key FOB and one additional mechanical key, per vehicle, until further notice.
22-HC-001H
Service Bulletin/Repair Instructions
If you are servicing an applicable model with Hybrid Drive Motor (Traction Motor) improper operation or any DTC listed in the related shop manual, Motor Control System, refer to the shop manual for diagnosis. If the diagnosis indicates a faulty hybrid drive motor, refer to the Service Procedure and replace the hybrid drive motor.