Hyundai Sonata Service Bulletins (2026)
15 manufacturer communications on file.
- July 27, 2026•Document ID: 11036095Warranty Program/ExtensionPOWER TRAIN
- Mfr Comm. #:
- 26-01-060H TSB
- Date Added:
- August 11, 2026
- Manufacturer:
- HYUNDAI
SummaryCertain Sonata (DN8) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover due to a loose oil level plug that could potentially lead to a total failure of the automatic transmission. This bulletin provides instructions to inspect the oil level plug and transmission oil level and, if necessary, replace the automatic transmission.
Associated Products (2)Associated Documents - July 27, 2026•Document ID: 11036093Warranty Program/ExtensionPOWER TRAIN
- Mfr Comm. #:
- 26-01-060H WebDCS
- Date Added:
- August 11, 2026
- Manufacturer:
- HYUNDAI
SummaryCertain Sonata (DN8) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover due to a loose oil level plug that could potentially lead to a total failure of the automatic transmission. Technical Service Bulletin (TSB) 26-01-060H instructions to inspect the oil level plug and transmission oil level and, if necessary, replace the automatic transmission.
Associated Products (2)Associated Documents - July 21, 2026•Document ID: 11035241Warranty Program/ExtensionSTRUCTURE:BODY
- Mfr Comm. #:
- 26-01-057H DCS
- Date Added:
- July 28, 2026
- Manufacturer:
- HYUNDAI
SummaryCertain 2026MY Sonata (DN8) and 2026MY Sonata Hybrid (DN8 HEV) vehicles may exhibit a fuel filler door that is difficult to open due to the push-type opener mechanism. Technical Bulletin (TSB) 26-01-057H provides instructions to inspect the fuel filler door push opener and, if necessary, replace the component to restore proper operation.
Associated Products (1)Associated Documents - July 17, 2026•Document ID: 11035144Warranty Program/ExtensionSTRUCTURE:BODY
- Mfr Comm. #:
- 26-01-057H TSB
- Date Added:
- July 21, 2026
- Manufacturer:
- HYUNDAI
SummaryCertain Sonata (DN8) and Sonata Hybrid (DN8 HEV) vehicles may exhibit a fuel filler door that is difficult to open due to the push-type opener mechanism. This bulletin provides instructions to inspect the fuel filler door push opener and, if necessary, replace the component to restore proper operation.
Associated Products (1)Associated Documents - July 14, 2026•Document ID: 11035142Warranty Program/ExtensionELECTRICAL SYSTEM
- Mfr Comm. #:
- LA29-LA30 DCS
- Date Added:
- July 21, 2026
- Manufacturer:
- HYUNDAI
SummaryCertain 2024-2026MY Sonata (DN8) and 2024-2026MY Sonata Hybrid (DN8 HEV) vehicles may exhibit intermittent battery discharge condition due to the air conditioning controller not fully powering down after the vehicle is turned off and parked. Technical Service Bulletins (TSB) 26-01-051H & 26-01-052H provide the procedure to update the ATCU (Air Temperature Control Unit) software; the revised logic improves controller shutdown to prevent battery drain and corrects a condition where the HVAC control display may appear blank when climate remote start is activated via Bluelink. Over-the-Air (OTA): This update can also be conducted via OTA. Customers can complete on their own if they have an active subscription to Hyundai Bluelink. A visit to the dealership is not required. Deployment of the OTA to Bluelink customers is planned to start the week of 07/13/26.
Associated Products (3)Associated Documents - July 13, 2026•Document ID: 11035140Warranty Program/ExtensionELECTRICAL SYSTEM
- Mfr Comm. #:
- 7/13/2026 TSB
- Date Added:
- July 21, 2026
- Manufacturer:
- HYUNDAI
SummaryCertain Sonata (DN8) vehicles may exhibit intermittent battery discharge condition due to the air conditioning controller not fully powering down after the vehicle is turned off and parked. This bulletin provides the procedure to update the ATCU (Air Temperature Control Unit) software; the revised logic improves controller shutdown to prevent battery drain and corrects a condition where the HVAC control display may appear blank when climate remote start is activated via Bluelink.
Associated Products (3)Associated Documents - June 5, 2026•Document ID: 11033840Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- 26-AT-005H TSB
- Date Added:
- June 16, 2026
- Manufacturer:
- HYUNDAI
SummaryThis bulletin provides information related to a Transmission Control Unit (TCU) software update for some vehicles equipped with an 8-speed wet dual clutch transmission (8WDCT). The software update revises the touch point learning variation, improving drivability and judder symptoms. Some 8WDCTs (indicated by a new part number) received an updated clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise, drivability concerns may occur. This service procedure should be performed prior to any 8WDCT replacements done for drivability/judder concerns.
Associated Products (14)Associated Documents - April 10, 2026•Document ID: 11032523OtherAIR BAGS
- Mfr Comm. #:
- DTN DL
- Date Added:
- May 8, 2026
- Manufacturer:
- GENESIS
SummaryThe 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.
Associated Products (111)2026 Genesis G702026 Genesis G802026 Genesis G902026 Genesis GV602026 Genesis GV702026 Genesis GV802026 Hyundai Elantra2026 Hyundai Elantra N2026 Hyundai Ioniq 52026 Hyundai Ioniq 5 N2026 Hyundai Ioniq 62026 Hyundai Ioniq 6 N2026 Hyundai Ioniq 92026 Hyundai Kona2026 Hyundai Nexo2026 Hyundai Palisade2026 Hyundai Santa Cruz2026 Hyundai Santa Fe2026 Hyundai Sonata2026 Hyundai Tucson+ 91 moreAssociated Documents - April 10, 2026•Document ID: 11032522OtherAIR BAGS
- Mfr Comm. #:
- DTN DCS
- Date Added:
- May 8, 2026
- Manufacturer:
- GENESIS
SummaryThe 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.
Associated Products (111)2026 Genesis G702026 Genesis G802026 Genesis G902026 Genesis GV602026 Genesis GV702026 Genesis GV802026 Hyundai Elantra2026 Hyundai Elantra N2026 Hyundai Ioniq 52026 Hyundai Ioniq 5 N2026 Hyundai Ioniq 62026 Hyundai Ioniq 6 N2026 Hyundai Ioniq 92026 Hyundai Kona2026 Hyundai Nexo2026 Hyundai Palisade2026 Hyundai Santa Cruz2026 Hyundai Santa Fe2026 Hyundai Sonata2026 Hyundai Tucson+ 91 moreAssociated Documents - April 8, 2026•Document ID: 11031315Service CampaignELECTRICAL SYSTEM
- Mfr Comm. #:
- 26-01-035H TSB
- Date Added:
- April 15, 2026
- Manufacturer:
- HYUNDAI
SummarySome 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.
Associated Products (18)2026 Hyundai Ioniq 52026 Hyundai Ioniq 5 N2026 Hyundai Kona2026 Hyundai Palisade2026 Hyundai Santa Cruz2026 Hyundai Santa Fe2026 Hyundai Sonata2026 Hyundai Tucson2025 Hyundai Ioniq 52025 Hyundai Ioniq 5 N2025 Hyundai Kona2025 Hyundai Santa Cruz2025 Hyundai Santa Fe2025 Hyundai Sonata2025 Hyundai Tucson2024 Hyundai Kona2024 Hyundai Santa Fe2024 Hyundai SonataAssociated Documents - February 25, 2026•Document ID: 11029906Service Bulletin/Repair InstructionsEXTERIOR LIGHTING; FORWARD COLLISION AVOIDANCE: WARNINGS; LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
- Mfr Comm. #:
- 26-AD-001H TSB
- Date Added:
- March 7, 2026
- Manufacturer:
- HYUNDAI
SummarySome 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).
Associated Products (41)2026 Hyundai Elantra N2026 Hyundai Ioniq 52026 Hyundai Ioniq 5 N2026 Hyundai Ioniq 62026 Hyundai Ioniq 6 N2026 Hyundai Kona2026 Hyundai Santa Cruz2026 Hyundai Sonata2026 Hyundai Tucson2025 Hyundai Elantra2025 Hyundai Elantra N2025 Hyundai Ioniq 52025 Hyundai Ioniq 5 N2025 Hyundai Ioniq 62025 Hyundai Kona2025 Hyundai Santa Cruz2025 Hyundai Sonata2025 Hyundai Tucson2024 Hyundai Elantra2024 Hyundai Elantra N+ 21 moreAssociated Documents - December 10, 2025•Document ID: 11026612Service CampaignELECTRICAL SYSTEM
- Mfr Comm. #:
- TEB/TEBA DCS
- Date Added:
- December 16, 2025
- Manufacturer:
- HYUNDAI
SummaryHyundai Motor America is currently investigating an ongoing issue with software GDS event #1302. The matter is being investigated. We will provide an update once the issue is resolved and the suspension is lifted.
Associated Products (3)Associated Documents - November 6, 2025•Document ID: 11025476Service Bulletin/Repair InstructionsEXTERIOR LIGHTING
- Mfr Comm. #:
- 25-BD-012H TSB
- Date Added:
- November 12, 2025
- Manufacturer:
- HYUNDAI
SummaryThis 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.
Associated Products (105)2026 Genesis G702026 Genesis G802026 Genesis G902026 Genesis GV702026 Genesis GV802026 Hyundai Ioniq 92026 Hyundai Kona2026 Hyundai Palisade2026 Hyundai Santa Cruz2026 Hyundai Santa Fe2026 Hyundai Sonata2026 Hyundai Tucson2026 Hyundai Venue2025 Genesis G702025 Genesis G802025 Genesis G902025 Genesis GV602025 Genesis GV702025 Genesis GV802025 Hyundai Elantra+ 85 moreAssociated Documents - October 21, 2025•Document ID: 11024538Service CampaignELECTRICAL SYSTEM
- Mfr Comm. #:
- 25-01-075H/076H DCS
- Date Added:
- October 29, 2025
- Manufacturer:
- HYUNDAI
SummaryCertain Sonata (DN8) and Sonata Hybrid (DN8 HEV) vehicles may experience battery drain due to the air conditioning controller not shutting down completely while the vehicle is parked and turned off. TSBs 25-01-075H (for Sonata vehicles) & 25-01-076H (Sonata Hybrid vehicles) provides instructions to perform a software update for the ATCU (Air Temperature Control Unit).
Associated Products (3)Associated Documents - October 21, 2025•Document ID: 11024510Service CampaignELECTRICAL SYSTEM
- Mfr Comm. #:
- 25-01-075H TSB
- Date Added:
- October 28, 2025
- Manufacturer:
- HYUNDAI
SummaryCertain Sonata (DN8) vehicles may experience battery drain due to the air conditioning controller not shutting down completely while the vehicle is parked and turned off. This bulletin provides instructions to perform a software update for the ATCU (Air Temperature Control Unit).
Associated Products (3)Associated Documents