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Service bulletins for the 2018 Hyundai Accent

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.

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

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Bulletins, newest first
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-P9V2Z-062018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM; EQUIPMENT. Hyundai Motor America is adding additional VINs to Service Campaign T2X. Service Campaign T2X provides a service procedure to replace spark plugs on certain 2018 Accent vehicles.
5NP-B4B6V-062018-06-11. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides the procedure to inspect the current spark plugs, replace all 4 spark plugs, check new spark plug gap, and clear Diagnostic Trouble Codes (DTC). This bulletin addresses the following conditions: ? DTC P0300 / P0301 / P0302 / P0303 / P0304 Random/Multiple Misfire. ? Engine runs rough.
5NP-W7U4F-052018-05-21. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides the procedure to inspect the current spark plugs, replace all 4 spark plugs, check new spark plug gap, and clear Diagnostic Trouble Codes (DTC). This bulletin addresses the following conditions: ? DTC P0300 / P0301 / P0302 / P0303 / P0304 Random/Multiple Misfire. ? Engine runs rough.
5NP-P5L7D-052018-05-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT. If you are servicing a vehicle with a harsh and/or delayed shift, use the GDS as shown in the Service Procedure to measure shift engagement time.
5NP-G7W3S-052018-05-21. Service bulletin. POWER TRAIN. If a vehicle exhibits a harsh and/or delayed shift, follow the Service Procedure below to measure the shift engagement time.
5NP-G7V2G-052018-05-21. Service bulletin. ENGINE AND ENGINE COOLING. Hyundai Motor America is conducting a Service Campaign to replace the spark plugs on certain 2018 Accent vehicles. Service Campaign T2X provides a service procedure to replace the spark plugs.
5NP-F6W6P-052018-05-21. Service bulletin. POWER TRAIN; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS; EQUIPMENT. The shift lever on some 6-speed vehicles may intermittently not shift out of Park. This bulletin provides the diagnostic procedures to correct this condition.

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