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.
Technical service bulletin 27Service campaign 10Warranty extension 7
- 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 OR 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 OR 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 OR 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 OR 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 OR 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 OR 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 OR 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