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Service bulletins for the 2018 Kia Optima

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.

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

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
PS5812018-12-17. Service bulletin. ELECTRICAL SYSTEM. PITSTOP: HYBRID HV BATTERY SOC GAUGE (PS581) - This Pitstop provides information regarding the State of Charge (SOC) gauge on all Kia Hybrid P/HEV) vehicles. Normal operation of the HEV SOC gauge is between 40-60%. This is to allow for regeneration and degeneration of the HEV battery.
VPI1802_QA2018-08-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE; ENGINE; POWER TRAIN. Q & A - This document is the Q & A for the new Product Improvement Campaign to provide information regarding a software update to the Engine Control Unit (ECU) to protect the engine from excessive connecting rod bearing damage.
VPI1802_DSM2018-08-06. Service bulletin. ENGINE; POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. DEALER SERVICE MANAGER NOTICE - This notice advised the dealer service manager of the new Product Improvement Campaign to perform a software update to the Engine Control Unit (ECU) to protect the engine from excessive connecting rod bearing damage.
VPI1802_DP2018-08-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. DEALER PRINCIPAL NOTICE - This notice advised the dealer principal of the new Product Improvement Campaign to perform a software update to the Engine Control Unit (ECU) to protect the engine from excessive connecting rod bearing damage.
PS5642018-06-18. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. PITSTOP - CLOCK CONCERNS ON UVO eSERVICES (UVO 3.0) - This Pitstop contains information regarding possible concerns with the clock on UVO eServices (UVO 3.0) head units installed on 2017-2018MY vehicles.
PS5312018-01-16. Service bulletin. ELECTRICAL SYSTEM. PITSTOP - KEY FOB AND BATTERY VIN LABELS - To assist in improving product quality and warranty claims, key fobs/smart keys and the vehicle battery now have labels (A) containing the Vehicle Identification Number (VIN). These labels have been applied beginning with October 21, 2017 production for Optima (JFa) and Sorento (UMa) from the Kia Motors Manufacturing Georgia (KMMG) plant.
PS5242017-11-14. Service bulletin. ELECTRICAL SYSTEM:WIRING: REAR COMPARTMENT/TRUNK. PITSTOP - OPTIMA TRUNK TORSION BAR ADJUSTMENT - On some 2016-2018MY Optima (JFa) vehicles, there may be a concern with the trunk not opening as designed when using transmitter key fob or Smart Trunk feature. This may be caused by improper assembly of the trunk torsion bar (A) and trunk lid hinge. Follow the procedure in this publication to correct this concern.
PS5222017-11-14. Service bulletin. ELECTRICAL SYSTEM. PITSTOP - ECO-COASTING (ECOASTING) & ECO-DAS (DRIVING ASSISTANT SYSTEM) OVERVIEW ? CUSTOMER TIP - This Pitstop provides information regarding Eco-Coasting Guide (eCoasting) and Eco-Driving Assistant System (DAS) found on 2017-18MY Niro (DE HEV), Niro Plug-in (DE PHEV), Optima Hybrid (JF HEV), and Optima Plug-in (JF PHEV) vehicles.
PS5202017-11-14. Service bulletin. ELECTRICAL SYSTEM. PITSTOP - HYBRID POWER CONTROL UNIT 30A DC FUSE - The 2017MY~ Optima Hybrid (JF HEV), Optima Plug-in Hybrid (JF PHEV), and Niro (DE HEV) vehicles are equipped with a replaceable 30A fuse for the eCompressor. This fuse is easily accessible under a cover between the power cable connector and inverter cable, as shown below. However, the housing for the fuse is internally bolted to the HPCU assembly and is only available as part of the HPCU assembly. Forcibly removing the fuse housing assembly will result in damaging the internal HPCU terminals which will require replacement of the entire HPCU assembly and is not covered under Warranty.Follow the procedure in this ublication to inspect and/or replace the fuse, or refer to the ?Hybrid Control System ? Hybrid Control System ? DC Fuse ? Repair procedures? chapter in the applicable Shop Manual on KGIS.

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