Service Bulletins
Manufacturer Technical Service Bulletins (TSBs) issued to authorized dealers — software updates, repair procedures, fault-code fixes, and warranty coverage details for current and recent model years.
2021-2025 Hyundai Elantra Inoperable Horn Warranty Extension
Hyundai has issued a warranty extension (TSB 25-BE-005H-1) for 2021-2025 Hyundai Elantra vehicles that may experience an inoperable horn. This extension covers horn assembly replacement for up to 10 years or 120,000 miles at no cost to owners.
2021-2025 Hyundai Elantra Inoperable Horn TSB
Hyundai Technical Service Bulletin 25-BE-005H-1 addresses an inoperable horn condition in 2021-2025 Hyundai Elantra, Elantra N, and Elantra Hybrid vehicles. The manufacturer is extending the warranty for horn replacement to 10 years or 120,000 miles.
2024 Hyundai Elantra Coolant Leak from ITM Module TSB 25-EM-003H
Hyundai has issued Technical Service Bulletin (TSB) 25-EM-003H for certain 2024 Hyundai Elantra vehicles experiencing a coolant leak from the Integrated Thermal Management (ITM) Module's Heat Exchange Port. This TSB outlines the procedure for replacing the affected component.
2025 Hyundai Elantra Cooling Fan Vibration TSB
Hyundai has released Technical Service Bulletin (TSB) 25-EE-001H for certain 2025 Elantra (CN7) vehicles. This TSB addresses a condition where owners may experience steering wheel vibration when the engine cooling fan operates at high speed, indicating a potential issue with the cooling fan…
2021-2024 Hyundai Elantra Ventilator Lever TSB
Hyundai has issued Technical Service Bulletin 25-HA-001H for 2021-2024 Elantra models to address issues with the ventilator lever. Owners may notice a lack of airflow from center vents, mode actuator problems, or popping/snap noises when switching HVAC modes.
2021-2025 Hyundai Elantra Inoperable Horn TSB
Hyundai has released Technical Service Bulletin (TSB) 25-BE-005H to address an issue where the horn assembly may become inoperable in certain 2021-2025 Elantra, Elantra (CN7A), and Elantra Hybrid (CN7 HEV) vehicles. This TSB includes a warranty extension (Z03) for the horn replacement.
2021-2022 Hyundai Elantra DTC C1620 Front Radar Issue
Hyundai has issued Technical Service Bulletin 24-BE-005H for 2021-2022 Elantra vehicles. It addresses a warning light with DTC C1620, caused by a faulty front radar unit, which can affect Smart Cruise Control and Forward Collision-Avoidance Assist.
2024 Hyundai Elantra Coolant Leak TSB: ITM Module Port
Hyundai has issued Technical Service Bulletin 24-EM-011H for certain 2024 Hyundai Elantra vehicles experiencing a coolant leak from the Integrated Thermal Management (ITM) Module Heat Exchange Port. This TSB outlines the procedure to replace the affected component.
2023 Hyundai Elantra TMK Sealant Leakage TSB 24-01-042H
Hyundai has issued Technical Service Bulletin (TSB) 24-01-042H for certain 2023 Hyundai Elantra N and Elantra Hybrid vehicles regarding potential sealant leakage from the Tire Mobility Kit (TMK). This leakage can contaminate surrounding components. The TSB outlines inspection and replacement…
2021-2023 Hyundai IVT Oil Pressure Sensor DTCs P0845 P0846 P0867
Hyundai has issued Technical Service Bulletin 23-AT-010H concerning certain 2021-2023 vehicles equipped with an Intelligent Variable Transmission (IVT) that may trigger a check engine light with DTCs P0845, P0846, or P0867. This bulletin outlines a procedure to replace the IVT oil pressure sensor…
2023 Hyundai Elantra Kona P250C Oil Level Sensor Warning
Hyundai Technical Service Bulletin 23-EM-004H addresses a warning lamp illumination for DTC P250C, 'Engine Oil Level Sensor Circuit Low,' in certain 2023 Hyundai Elantra (CN7) and Kona (OS) vehicles with the 2.0L Nu Atkinson engine. An ECU update is required to resolve the issue.
2021-2023 Hyundai N 8-Speed DCT Learning Update
Hyundai has released Technical Service Bulletin 23-AT-013H to address drivability concerns and improve touch point learning in the 8-speed wet dual clutch transmissions (8WDCT) of certain 2021-2023 Veloster N, Kona N, and Elantra N vehicles. This involves a Transmission Control Unit (TCU) software…
2021-2023 Hyundai Apple CarPlay Google Maps Delay TSB
Hyundai has issued TSB 23-BE-007H to address Google Maps delays when using Apple CarPlay. The fix involves a software update available via USB from Hyundai's Navigation Updates page. This update introduces frame skip logic to manage data congestion.
2022 Hyundai HECU Module Dark Current Measurement TSB
A Technical Service Bulletin (TSB) has been released for certain 2022 Hyundai Elantra, Sonata, and Santa Fe vehicles concerning an Electronic Parking Brake (EPB) warning light and DTC C1501. The issue stems from brake fluid entering the HECU electrical connector, leading to excessive dark current…
2022 Hyundai Elantra / Sonata / Santa Fe EPB Warning Light TSB
Hyundai has issued Service Campaign 990 (TSB 23-01-036H-1) for certain 2022 Elantra, Sonata, and Santa Fe vehicles. Owners may experience an Electronic Parking Brake (EPB) warning light due to brake fluid entering the HECU electrical connector, potentially triggering DTC C1501.
2022 Hyundai Elantra / Sonata / Santa Fe EPB Warning Light TSB
Hyundai has issued Technical Service Bulletin 23-01-036H (Service Campaign 990) for certain 2022 Elantra, Sonata, and Santa Fe models. This bulletin addresses an illuminated Electronic Parking Brake (EPB) warning light and DTC C1501 due to brake fluid entering the HECU electrical connector…
2021 Hyundai Elantra Engine Stall TSB
Hyundai has released Technical Service Bulletin 23-01-006H for 2021 Elantra vehicles equipped with the 2.0L MPI IVT. This bulletin addresses a potential engine stall condition that may occur after Forward Collision Avoidance (FCA) activation by updating the Transmission Control Unit (TCU) software.
2021 Hyundai Elantra Engine Stall Service Campaign
Hyundai's Service Campaign 967 (TSB 23-01-006H) targets 2021 Elantra vehicles with a 2.0L MPI engine and IVT to correct an engine stall issue. This update to the Transmission Control Unit (TCU) software prevents stalling at low RPMs after Forward Collision Avoidance (FCA) activation.
2022-2023 Hyundai Elantra Missing Smart Key FOB Campaign 988
Hyundai Service Campaign 988 addresses certain 2022-2023 Elantra, Elantra N, and Elantra Hybrid vehicles that were delivered with only one Smart Key FOB. Owners can now get a second key fob and have both programmed at no charge. An appointment is required.
2022-2023 Hyundai Elantra One Smart Key FOB Issue TSB
Hyundai has released Technical Service Bulletin (TSB) 23-01-016H to address an issue where certain 2022-2023 Elantra, Elantra Hybrid, and Elantra N vehicles were delivered with only one Smart Key FOB instead of the standard two. This campaign, identified as Service Campaign 988, provides the…
2021-2022 Hyundai Elantra ICU Software Update TSB
Hyundai TSB 22-01-076H-1 addresses issues in 2021-2022 Elantra models, including multiple warning lights, reduced power steering, and inability to shift from Park. The fix involves an Integrated Central Control Unit (ICU) software update to resolve related DTCs.