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Service bulletins for the 2018 Hyundai Elantra

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

123 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

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Bulletins, newest first
19-BE-015H-12019-11-18. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. This bulletin contains information regarding the clock display on certain Navigation (AVN 4.0) head units. This procedure is specifically for the clock date and time not displaying which started appearing around August 17, 2019. Other similar concerns which were opened before this date are a different root cause and will not be resolved by this information. An example of the clock concern is shown in the screenshot below:
19-BE-015H-12019-11-06. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains information regarding the clock display on certain Navigation (AVN 4.0) head units. This procedure is specifically for the clock date and time not displaying which started appearing around August 17, 2019. Other similar concerns which were opened before this date are a different root cause and will not be resolved by this information. An example of the clock concern is shown in the screenshot below:
19-GI-006H2019-11-06. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This bulletin provides instruction detailing the proper methodology for scanning and uploading captured GDS data files to the Techline Repository. Compliance with this bulletin ensures that the GDS data files are correctly transferred and matched with a Techline Case number.
19-AT-016H2019-09-30. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT ADAPTIVE/MOBILITY. If you are servicing an applicable vehicle with a ?Check Engine? light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness.
19-AT-012H2019-07-29. Service bulletin. POWER TRAIN. This TSB provides a procedure to diagnose and repair a transaxle for the following Incorrect Ratio DTC (transaxle clutch slipping more than 200 rpm in gear).
19-AT-010H2019-07-01. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. This bulletin provides a procedure to transfer pressure data to the ECU/TCU using GDS Mobile. This procedure is necessary to reduce the TCU learning time and improve the shift quality.
19-ST-001H2019-05-20. Service bulletin. STEERING. This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components.
19-FL-003H2019-05-20. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides the procedure to write the Vehicle Identification Number (VIN) during the replacement of the Engine Control Module (ECM) or Powertrain Control Module (PCM). Once the VIN has been programmed to the ECM/PCM, it cannot be removed or overwritten.
19-BE-004H2019-04-22. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES; VISIBILITY. This bulletin provides information on the serviceable parts for the outside mirror assembly. When diagnosing and repairing the outside mirror, do not replace the entire assembly. Refer to page 2 of this TSB for replacement of individual parts.
5NP-Z3A5R-022019-02-19. Service bulletin. POWER TRAIN. This bulletin provides the procedure to update the TCU (Transmission Control Unit) in certain vehicles (listed Below) when replacing the Dual Clutch Transmission (DCT) with updated clutch material. This bulletin also provides a method of identifying transmissions with the updated F850 clutch material.
5NP-R9D7V-012019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information on certain 2017-2018 model year Elantra (AD/ADA) 2.0L vehicles to update the ECM (Engine Control Module), update the HVAC ECU, and to update the engine coolant temperature gauge of the Instrument Cluster for improving heater performance.
5NP-Y4N3B-082018-08-20. Service bulletin. EQUIPMENT. This bulletin describes the procedure to diagnose the vehicle?s D-Audio unit as a result of the inability to set the clock or view it on the top of the screen.
5NP-P4Y7D-082018-08-20. Service bulletin. ENGINE. If you are servicing an applicable vehicle with a ?Check Engine Light on? and one or more of the DTC listed below, follow the repair procedure and replace the input/output speed sensor and oil pressure harness.
5NP-M5G2M-082018-08-20. Service bulletin. ENGINE AND ENGINE COOLING. If you are servicing an applicable vehicle with a complaint of ?Check Engine Light on? and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness.
5NP-C5F9C-082018-08-20. Service bulletin. ENGINE AND ENGINE COOLING. If you are servicing an applicable vehicle with a Check Engine light on and one or more of the DTC listed below, follow the repair procedure and replace the oil pressure harness.
5NP-U8N3D-072018-07-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. On certain 2018MY Elantra 2.0L (ADa) vehicles, the V-ribbed belt may become frayed. Follow the procedure outlined in this bulletin to inspect and if necessary replace the V-ribbed belt.
5NP-F2Q2S-072018-07-16. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. Hyundai Motor America is conducting a Service Campaign to inspect and (if necessary) replace the V-ribbed belt on certain 2018 2.0L Elantra vehicles. Service Campaign T3A provides a service procedure to inspect the V-ribbed belt.
5NP-G7C2D-062018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin describes the procedure to determine if the vehicle?s display audio radio unit needs to be replaced as a result of the clock time inaccuracy (i.e. Resets overnight, loses/gains time).
5NP-A4C8N-032018-03-12. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. This TSB provides information on the headlight pattern changes on certain 2018 MY Sonata (LFa), Elantra (ADa)(AD), Elantra GT (PD), Santa Fe Sport (AN), and Santa Fe (NC).
5NP-T5B2D-022018-02-12. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. This bulletin describes the procedure to determine if the vehicle?s head unit needs to be replaced as a result of the system frequently losing a Bluetooth connection with Apple iPhone devices.
5NP-N5K9P-012018-01-16. Service bulletin. EQUIPMENT. This bulletin describes the procedure to inspect and replace the floor console armrest if the cover material is found to be peeling.
5NP-G8S6L-012018-01-16. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin describes the procedure to determine if the vehicle's navigation unit needs to be replaced as a result of the inability to set the clock or view it on the top of the screen.
5NP-V3F8T-092017-09-14. Service bulletin. EQUIPMENT:ELECTRICAL. If you are servicing a vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. ? Diagnostic trouble codes: ? P0705 - Range switch sensor circuit ? P0706 - Range switch range/performance ? P0707 - Range switch - open circuit ? P0708 - Range switch - short circuit or multiple inputs ? Symptoms: ? Malfunction Indicator Light (MIL) illuminated ? 4th gear fail-safe ? No gear indication in cluster ? Intermittent no engine crank/no start in ?P? or ?N? with or without MIL or DTC.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.