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Service bulletins for the 2018 Genesis G90

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.

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

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By component

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
21-EM-006HG(1)2021-05-05. Service bulletin. ENGINE AND ENGINE COOLING. Certain G80 and G90 Genesis vehicles may experience DTC code P0597 for “Thermostat Heater Control Circuit/Open”. This bulletin provides information on replacing the electric thermostat. No drivability issues are associated with this condition.
21-EM-004H2021-04-07. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. 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 steps.
21-EM-003H2021-04-06. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below.
19-EM-001HG2019-11-18. Service bulletin. ENGINE. This bulletin provides information regarding the changes in the timing chain and the crankshaft sprockets on certain Genesis G80 (DH) and Genesis G90 (HI) vehicles equipped with Lambda 3.3T / 3.8L GDI engines.
19-EM-001HG2019-11-06. Service bulletin. POWER TRAIN; ENGINE. This bulletin provides information regarding the changes in the timing chain and the crankshaft sprockets on certain Genesis G80 (DH) and Genesis G90 (HI) vehicles equipped with Lambda 3.3T / 3.8L GDI engines.
Service Campaign2019-09-30. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. Genesis Motor America is conducting an Emissions Service Campaign to inspect, and if necessary, replace the oil cap on certain 2018MY G80 (DH) and G90 (HI) vehicles equipped with Lambda engines.
19-01-022HG2019-09-30. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE; EQUIPMENT. On certain 2018MY G80 (DH) and G90 (HI) vehicles equipped with Lambda engines, the factory installed engine oil filler cap may have the incorrect text for engine oil viscosity printed on top.
19-AT-004HG2019-04-22. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This bulletin provides the procedure to replace the O-ring to the automatic transmission fluid (ATF) warmer connector on some vehicles which may exhibit a coolant leak between the ATF connector and engine side heater pipe.
5NP-C8X5J-122018-12-17. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. This bulletin provides information related to an ECM (Engine Control Module) software update to improve starting performance. Perform this update if a vehicle is in for service for an intermittent no start concern.

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