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Service bulletins for the 2018 Hyundai Sonata

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.

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

By type

By component

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Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
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-H7A5L-012018-01-16. Service bulletin. EQUIPMENT:MECHANICAL. Hyundai Motor America is conducting a Service Campaign to install a bolt on the A/C bracket on certain 2018 Year Sonata vehicles. Service Campaign T2O provides a service procedure to install the a/c bracket bolt.
5NP-C3Z4G-012018-01-16. Service bulletin. EQUIPMENT:MECHANICAL. Some Sonata 2.4L (LFa) vehicles may have an A/C bracket bolt missing. Prolonged use under this condition may result in bracket damage.
5NP-T9L7Q-112017-11-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This bulletin provides information regarding the A/C evaporator drain hose length specification change on certain Sonata (LFa) vehicles.
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.