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-FL-003H TSB
Service Bulletin/Repair Instructions
Some Kona (SX2) vehicles equipped with the 1.6L T‑GDI engine may exhibit false “engine left idling” notifications in the MyHyundai app, even when the engine is not running, due to a logic error associated with the front oxygen (O₂) sensor. This condition may also illuminate the Malfunction Indicator Lamp (MIL) and set DTC P223700 (O₂ Sensor Pumping Current Circuit/Open [Bank 1 Sensor 1]). This bulletin provides instructions to perform an ECU software update to correct the O₂ sensor logic and resolve the condition.
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.
26-EE-003H TSB
Service Bulletin/Repair Instructions
Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter magnetic switch for potential freezing and, if necessary, replace the starter magnetic switch (solenoid) assembly.
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.
26-01-035H TSB
Service Campaign
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink functions. This may be due to an occasional disconnection on Verizon’s communication network. Follow the procedures in this bulletin to verify Bluelink Data Communication Unit (DCU) network connection and if needed, reset the DCU in Dealer Mode to resolve the connection.
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).
25-EM-007H TSB
Service Bulletin/Repair Instructions
Some Elantra (CN7, CN7A), Kona (OS, SX2), and Sonata Hybrid (DN8 HEV) vehicles equipped with 2.0L engines may illuminate a warning lamp for DTC P218100 (Cooling System Performance) related to the Integrated Thermal-Management Module (ITM). Follow the service procedure in this bulletin to install a spring onto the thermostat within the ITM, in order to prevent premature opening, and perform an ECU software update on affected vehicles.
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.
25-01-043H TSB
Service Campaign
Some Kona (SX2) vehicles may experience battery drain due to faulty logic keeping the taillights illuminated while the vehicle is parked and turned off. Follow the procedures outlined in this TSB to update the Body Domain Controller (BDC) to the latest software.
25-BE-013H TSB
Service Bulletin/Repair Instructions
Certain vehicles with the Connected Car Navigation Cockpit (ccNC) Lite units may exhibit connection issues with Bluetooth and wireless phone projection. The vehicle's name may also not appear when trying to connect via Bluetooth. This condition may be caused by an internal fault inside the ccNC unit. Follow the procedures in this TSB to replace the ccNC unit in affected vehicles.
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.
25-01-018H-1 TSB
Service Campaign
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink functions. This may be due to an occasional disconnection on Verizon’s communication network. Follow the procedures in this bulletin to verify Bluelink Data Communication Unit (DCU) network connection and if needed, reset the DCU in Dealer Mode to resolve the connection.
25-BE-008H TSB
Service Bulletin/Repair Instructions
Certain vehicles (See Applicable Vehicles List below) equipped with the 12-inch instrument cluster display and separate Instrument Cluster Module require software verification PRIOR to odometer mileage writing. If the Cluster Module does not have the latest software, the incorrect mileage may be written to the new module. This bulletin provides information to confirm the Instrument Cluster Module is equipped with the latest software version prior to using the GDS tablet to write the odometer mileage.
25-01-018H TSB
Service Campaign
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink functions. This may be due to an occasional disconnection on Verizon’s communication network. Follow the procedures in this bulletin to verify Bluelink Data Communication Unit (DCU) network connection and if needed, reset the DCU in Dealer Mode to resolve the connection.
25-BE-003H DN
Service Bulletin/Repair Instructions
Hyundai Motor America has noted that several vehicles were impacted by a telecommunications outage that occurred on Sunday, February 9th , resulting in the potential loss of connectivity or interruptions when attempting to use Bluelink functions. Voice Recognition, Sports Media, and Weather will not be available. Dealer stock and retailed vehicles are both affected. If a customer calls in and their vehicle is experiencing issues related to Bluelink, please have them come into the dealership to assist with resetting the Bluelink Data Communication Unit (DCU) and utilize TSB 25-BE-003H posted on Hyundai Tech Info.
25-01-012H TSB
Service Campaign
Certain Kona (SX2) vehicles may exhibit a dead battery concern linked to the Multimedia Keyboard (MKBD) logic. The MKBD may not enter sleep mode when the vehicle is turned OFF, causing the battery to be drained. Follow the procedure in this TSB to update the software for the MKBD to address this condition.
25-BE-003H TSB
Service Bulletin/Repair Instructions
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink functions. This may be due to an occasional disconnection on Verizon’s communication network. Follow the procedures in this bulletin to reset the Connected Car Data Communication Unit (DCU) in Dealer Mode to resolve the connection.
25-01-006H TSB
Service Campaign
Certain Kona (SX2) vehicles may exhibit a warning light ON in the cluster related to the “Check Forward Safety system” due to software intended from an alternate region. A software update is available for the Front Camera system to update logic in the Forward Collision Avoidance (FCA) and Lane Keeping Assist (LKA) functions. Advanced Driver Assistance System (ADAS) functions are not affected due to this condition.
25-01-005H TSB
Service Campaign
Certain vehicles listed below may have a Bluelink malfunction or not able to have Bluelink setup. This bulletin provides instructions to reset the network in Dealer Mode to prevent the Data Concentrator Unit (DCU) modem from experiencing a "Blue Link Not Open" error.
24-01-090H
Service Campaign
Certain Kona (SX2) vehicles may exhibit a dead battery concern linked to the Multimedia Keyboard (MKBD) logic. The MKBD may not enter sleep mode when the vehicle is turned OFF, causing the battery to be drained. Follow the procedure in this TSB to update the software for the MKBD to address this condition.
24-BE-013H
Service Bulletin/Repair Instructions
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Connected Car Service (CCS) functions. This may be due to an occasional disconnection on Verizon’s communication network. Follow the procedures in this bulletin to reset the Connected Car Data Communication Unit (DCU) in Dealer Mode to resolve the connection.
24-01-077H
Service Campaign
Certain Kona (SX2) vehicles may exhibit a warning light ON in the cluster related to the “Check Forward Safety system” due to software intended from an alternate region. This bulletin provides a software update for the Front Camera system to update logic in the Forward Collision Avoidance (FCA) and Lane Keeping Assist (LKA) functions. Advanced Driver Assistance System (ADAS) functions are not affected due to this condition.