2021 Hyundai Elantra Hybrid service bulletins & manufacturer communications

44 manufacturer communications are on file with NHTSA for the 2021 Hyundai Elantra Hybrid. TSBs are repair guidance for dealers — they are not recalls, and repairs are not automatically free.

• The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and dangerous driver’s-side airbag inflators manufactured by Jilin Province De…
  DTN DL · Technical service bulletin · Air Bags · issued Apr 10, 2026
• The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding dangerous, counterfeit driver‑side airbag inflators manufactured by Jilin …
  DTN DCS · Technical service bulletin · Air Bags · issued Apr 10, 2026
• 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 cas…
  26-AD-001H TSB · Technical service bulletin · Forward Collision Avoidance · issued Feb 25, 2026
• 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 …
  25-BD-012H TSB · Technical service bulletin · Exterior Lighting · issued Nov 6, 2025
• 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 …
  25-BE-020H TSB · Technical service bulletin · Electrical System · issued Sep 30, 2025
• 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 9B4 OL · Service campaign · Electrical System · issued Aug 21, 2025
• 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…
  25-01-010H-1 DN · Service campaign · Electrical System · issued Jul 16, 2025
• 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 …
  25-01-010H-1 TSB · Service campaign · Electrical System · issued Jul 16, 2025
• 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 …
  25-BE-005H-2 OL · Warranty extension · Unknown / Other · issued Jun 16, 2025
• 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 wa…
  25-BE-005H-2 TSB · Warranty extension · Unknown / Other · issued May 17, 2025
• 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 …
  25-BE-005H-2 DN · Warranty extension · Unknown / Other · issued May 17, 2025
• 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 …
  25-BE-002H TSB · Technical service bulletin · Electrical System · issued May 16, 2025
• 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 …
  25-BE-005H-1 DN · Warranty extension · Unknown / Other · issued May 8, 2025
• 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 wa…
  25-BE-005H-1 TSB · Warranty extension · Unknown / Other · issued May 8, 2025
• 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 comm…
  25-01-024H-1 TSB · Service campaign · Electrical System · issued May 8, 2025
• 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 comm…
  25-01-024H EM · Service campaign · Electrical System · issued Apr 7, 2025
• 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 repl…
  25-BE-005H DN · Warranty extension · Unknown / Other · issued Mar 19, 2025
• 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 …
  25-BE-005H TSB · Warranty extension · Unknown / Other · issued Mar 19, 2025
• 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 th…
  25-01-003H OL · Service campaign · Vehicle Speed Control · issued Feb 14, 2025
• 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…
  25-01-010H DN · Technical service bulletin · Fuel/propulsion System · issued Feb 11, 2025
• 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 …
  25-01-010H TSB · Service campaign · Fuel/propulsion System · issued Feb 11, 2025
• 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 cont…
  25-01-003H DBP · Service campaign · Vehicle Speed Control · issued Jan 16, 2025
• 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 cont…
  25-01-003H TSB · Service campaign · Vehicle Speed Control · issued Jan 16, 2025
• 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…
  24-BE-001H-1 · Technical service bulletin · Electrical System · issued Jul 19, 2024
• 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…
  24-01-054H · Service campaign · Electrical System · issued Jul 9, 2024
• 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 …
  SERVICE CAMPAIGN 9B4 · Technical service bulletin · Electrical System · issued Jul 4, 2024
• 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…
  24-BD-001H · Technical service bulletin · Visibility · issued Feb 14, 2024
• Hyundai has launched an anti-theft software upgrade and window decal campaign (Campaign 993), combined with an anti-theft steering wheel lock campaign (Campaign P32), and anti-thef…
  24-01-009H · Technical service bulletin · Electrical System · issued Feb 12, 2024
• 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…
  24-BE-001H · Technical service bulletin · Electrical System · issued Jan 10, 2024
• This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
  23-EM-005H · Technical service bulletin · Engine and Engine Cooling · issued Oct 13, 2023
• This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaiâ s Navigation Updates page. The current version of Google Maps has 1…
  23-BE-007H · Technical service bulletin · Equipment · issued Jul 17, 2023
• 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…
  23-BD-007H · Technical service bulletin · Structure · issued Apr 24, 2023
• 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 …
  23-BD-002H · Technical service bulletin · Visibility · issued Jan 30, 2023
• This bulletin provides information related to a Modular Clutch Actuator (MCA) compliance software update for P17D249, a permanent DTC that cannot be cleared with the CARB drive cyc…
  22-01-041H-1 · Technical service bulletin · Power Train · issued Dec 13, 2022
• A compliance software update is needed for DTC P17D249, a permanent DTC that affects the MCA (Modular Clutch Actuator). The software update allows the MCA to send the appropriate d…
  22-01-041H-1 · Technical service bulletin · Electrical System · issued Dec 13, 2022
• A compliance software update is needed for DTC P17D249, a permanent DTC that affects the MCA (Modular Clutch Actuator). The software update allows the MCA to send the appropriate d…
  22-01-041H · Technical service bulletin · Power Train · issued Nov 30, 2022
• This bulletin provides information related to a Modular Clutch Actuator (MCA) compliance software update for P17D249, a permanent DTC that cannot be cleared with the CARB drive cyc…
  22-01-041H · Technical service bulletin · Electrical System · issued Nov 30, 2022
• Some 2021 ~ 2022MY Elantra (CN7, CN7a, CN7 HEV) vehicles may exhibit a condition with multiple warning lights displayed on the instrument cluster and various symptoms; multiple DTC…
  22-01-076H-1 · Technical service bulletin · Electrical System · issued Oct 27, 2022
• Some 2021 ~ 2022MY Elantra (CN7, CN7a, CN7 HEV) vehicles may exhibit a condition with multiple warning lights displayed on the instrument cluster and various symptoms; multiple DTC…
  22-01-076H · Technical service bulletin · Power Train · issued Sep 20, 2022
• 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…
  22-EM-010H · Technical service bulletin · Engine and Engine Cooling · issued Jul 28, 2022
• 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 w…
  22-GI-006H · Technical service bulletin · Tires · issued Jul 14, 2022
• Certain vehicles may develop a bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly. If bearing noise is heard, follow the procedure in this bulle…
  218/231 amend · Technical service bulletin · Steering · issued Jun 3, 2022
• 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 th…
  22-HC-001H · Technical service bulletin · Electrical System · issued May 18, 2022
• Certain 2021MY Elantra vehicles may exhibit paint delamination on the left, right and lower moldings of the front bumper. Follow the procedure outlined in this bulletin to remove a…
  22-BD-001H · Technical service bulletin · Structure · issued Jan 31, 2022