Technical Service Bulletins (TSBs) for the 2021 Elantra are official communications between Hyundai & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

    BRAKES (PWS)

    • TSB #21-BR-002H

      Date Announced:
      MAR 23, 2021
      NHTSA ID:
      #10190038

      This bulletin provides best practice recommendations when performing brake service procedures. Read More »

    • TSB #20-BR-002H

      Date Announced:
      NOV 30, 2020
      NHTSA ID:
      #10183963

      This bulletin describes the procedure to inspect and identify fluid which may appear around the brake caliper area. Read More »

    ENGINE AND ENGINE COOLING

    • TSB #22-01-032H

      Date Announced:
      MAR 31, 2022
      NHTSA ID:
      #10210210

      On certain 2021 Elantra and 2022 Kona vehicles equipped with 2.0L engine, a coolant leak at the Water Temperature Sensor (WTS) may be observed due to machining burrs at the mounting port of the cylinder head, resulting in improper ... Read More »

    • TSB #21-01-048H

      Date Announced:
      JUN 21, 2021
      NHTSA ID:
      #10199097

      On certain 2021-2022 Elantra vehicles, a coolant leak at the Water Temperature Sensor (WTS) may be observed due to machining burrs at the mounting port of the cylinder head, resulting in improper coolant sealing. Read More »

    • TSB #21-01-043H

      Date Announced:
      MAY 27, 2021
      NHTSA ID:
      #10196551

      This bulletin provides information related to the Engine Control Module (ECM) software update for 2021MY Elantra (CN7/CN7A) vehicles equipped with the 2. Read More »

    • TSB #21-EM-004H

      Date Announced:
      MAR 30, 2021
      NHTSA ID:
      #10190044

      This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required ... Read More »

    • TSB #21-EM-003H

      Date Announced:
      MAR 10, 2021
      NHTSA ID:
      #10189989

      This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below. Read More »

    • TSB #21-01-017H

      Date Announced:
      MAR 05, 2021
      NHTSA ID:
      #10189981

      This bulletin provides the service procedure to update the Transmission Control Unit (TCU) software for certain Elantra (CN7/CN7a) vehicles equipped with the 2.0L MPI and Intelligent Variable Transmission (IVT). Read More »

    POWER TRAIN

    • TSB #22-01-007H

      Date Announced:
      JAN 12, 2022
      NHTSA ID:
      #10207807

      Certain vehicles equipped with 7-speed Double Clutch Transmissions (DCT) may exhibit abnormal shifting caused by an out of specification input shaft snap ring. Read More »

    • TSB #21-01-017H

      Date Announced:
      MAR 05, 2021
      NHTSA ID:
      #10189981

      This bulletin provides the service procedure to update the Transmission Control Unit (TCU) software for certain Elantra (CN7/CN7a) vehicles equipped with the 2.0L MPI and Intelligent Variable Transmission (IVT). Read More »

    ELECTRICAL SYSTEM

    • TSB #21-01-056H

      Date Announced:
      JUL 30, 2021
      NHTSA ID:
      #10200074

      Some 2021 Elantra (CN7) vehicles may exhibit a condition with multiple warning lights displayed on the instrument cluster and various symptoms; multiple DTCs (Diagnostic Trouble Code), reduction in power steering assist, and not able to ... Read More »

    • TSB #21-GI-005H

      Date Announced:
      MAY 26, 2021
      NHTSA ID:
      #10196583

      This bulletin provides information regarding the use of window mounted lockboxes without RFID shielding, which may cause battery drain on dealer stock vehicles. Read More »

    • TSB #21-BE-002H

      Date Announced:
      FEB 04, 2021
      NHTSA ID:
      #10188242

      This bulletin describes the procedure to update the radio software to help reduce the disconnection occurrences. Read More »

    • TSB #21-01-007H

      Date Announced:
      JAN 26, 2021
      NHTSA ID:
      #10186823

      When using Wireless CarPlay, the system may intermittently auto disconnect. When Wireless CarPlay is disconnected, a pop up message ⿿Phone Not Responding. Please reconnect it and try again⿝ will appear on the radio screen. Read More »

    • TSB #20-BE-014H

      Date Announced:
      DEC 21, 2020
      NHTSA ID:
      #10185443

      When using Wireless CarPlay, the system may intermittently auto disconnect. When Wireless CarPlay is disconnected, a pop up message ⿿Phone Not Responding. Please reconnect it and try again⿝ will appear on the radio screen. Read More »

    • TSB #20-GI-006H

      Date Announced:
      DEC 15, 2020
      NHTSA ID:
      #10185424

      This bulletin provides information on the Launch Quality Monitoring Process (LQMP) for the 2021MY Hyundai Elantra. After a new vehicle launch, Hyundai uses the LQMP to monitor all customer and dealer activities at a minimum of 100 days. Read More »

    EXTERIOR LIGHTING

    • TSB #21-BE-007H

      Date Announced:
      APR 21, 2021
      NHTSA ID:
      #10191795

      Some 2021 Elantra (CN7a) rear combination lamp turn signal light bulbs may prematurely become inoperative. This bulletin describes the procedure to replace the rear combination lamp turn signal light bulbs for both the right and left side. Read More »

    STRUCTURE

    • TSB #22-BD-001H

      Date Announced:
      JAN 31, 2022
      NHTSA ID:
      #10207810

      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 and replace the dark chrome front bumper moldings. Read More »

    TIRES

    • TSB #20-SS-004H

      Date Announced:
      NOV 19, 2020
      NHTSA ID:
      #10183960

      This bulletin provides tire vibration service procedures, including how to optimize vehicle vibration performance. Read More »

    WHEELS

    • TSB #20-SS-004H

      Date Announced:
      NOV 19, 2020
      NHTSA ID:
      #10183960

      This bulletin provides tire vibration service procedures, including how to optimize vehicle vibration performance. Read More »

    EQUIPMENT

    • TSB #22-BD-001H

      Date Announced:
      JAN 31, 2022
      NHTSA ID:
      #10207810

      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 and replace the dark chrome front bumper moldings. Read More »

    • TSB #22-01-007H

      Date Announced:
      JAN 12, 2022
      NHTSA ID:
      #10207807

      Certain vehicles equipped with 7-speed Double Clutch Transmissions (DCT) may exhibit abnormal shifting caused by an out of specification input shaft snap ring. Read More »

    • TSB #21-EM-004H

      Date Announced:
      MAR 30, 2021
      NHTSA ID:
      #10190044

      This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required ... Read More »

    • TSB #21-BR-002H

      Date Announced:
      MAR 23, 2021
      NHTSA ID:
      #10190038

      This bulletin provides best practice recommendations when performing brake service procedures. Read More »

    • TSB #21-EM-003H

      Date Announced:
      MAR 10, 2021
      NHTSA ID:
      #10189989

      This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below. Read More »

    EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

    • TSB #21-BE-002H

      Date Announced:
      FEB 04, 2021
      NHTSA ID:
      #10188242

      This bulletin describes the procedure to update the radio software to help reduce the disconnection occurrences. Read More »

    • TSB #20-GI-006H

      Date Announced:
      DEC 15, 2020
      NHTSA ID:
      #10185424

      This bulletin provides information on the Launch Quality Monitoring Process (LQMP) for the 2021MY Hyundai Elantra. After a new vehicle launch, Hyundai uses the LQMP to monitor all customer and dealer activities at a minimum of 100 days. Read More »

    EQUIPMENT ADAPTIVE/MOBILITY

    • TSB #21-BR-002H

      Date Announced:
      MAR 23, 2021
      NHTSA ID:
      #10190038

      This bulletin provides best practice recommendations when performing brake service procedures. Read More »