Model year guide

2018 Kia optima plug-in hybrid

Recalls, most-reported problems, crash-test ratings, fuel economy and what a 2018 Kia optima plug-in hybrid is worth — from official NHTSA and EPA data. 1 on record.

2018 Kia optima plug-in hybrid at a glance

Safety recallsNone
Owner complaints243
Combined40 mpg

Included: that car's specs and build sheet, model-year recall campaigns and a fair price.

2018 Kia optima plug-in hybrid recalls 0

No NHTSA safety-recall campaigns are on record for the 2018 Kia optima plug-in hybrid.

Source: U.S. NHTSA, checked 4 Nov 2026. A campaign covers the model year; to see whether a particular car still needs the repair, check its VIN on NHTSA.gov or ask a franchised dealer.

2018 Kia optima plug-in hybrid common problems

The most-reported problem areas across all 243 owner complaints filed with NHTSA — and what to check before you buy.

Engine
Listen for knocks or ticking, check for leaks and blue/white exhaust smoke, and make sure it doesn't overheat. No check-engine light should be on.
Electrical System
Test every electrical feature: windows, locks, infotainment, charging and all lights. Watch for flickering, dead accessories or warning lights.
Power Train
Drive through every gear: watch for slipping, hard or delayed shifts, and shudder. Check for transmission/driveline leaks and noises.
Service Brakes
Brakes should feel firm and quiet — no grinding, pulsing or pulling. Check for an ABS light and uneven pad/rotor wear.
Engine And Engine Cooling
Check coolant level and color, look for leaks, and confirm the engine reaches normal temperature without overheating.
Fuel/propulsion System
Check for fuel or battery warnings, hard starts and stalling. On a hybrid/EV, confirm charging and range behave normally.

2018 Kia optima plug-in hybrid MPG & running costs

Combined40 mpg
City38 mpg
Highway43 mpg
Est. annual fuel cost$1,700
EPA size classMidsize Cars
TransmissionAutomatic (AM6)
Electric range610 mi
Charge time (240V)2.7 hours
Engine start-stopYes
Passenger volume105 cu ft
Cargo volume10 cu ft
5-yr fuel cost vs average new car$6,250 less

Source: U.S. EPA / DOE fueleconomy.gov.

Estimated 5-year cost to own

A rough guide to what running a 2018 Kia optima plug-in hybrid costs over five years and 75,000 miles.

Fuel (5 yrs)$8,500
Fuel only$8,500
Per mile$0.11

How this is estimated: fuel is the U.S. EPA annual cost at 15,000 miles a year. There aren't enough comparable listings to estimate depreciation for this model, so it is left out. Not included: insurance, maintenance, repairs, taxes, registration and finance costs. Treat it as a comparison guide, not a quote.

Investigations & service bulletins

NHTSA defect investigations 4

Pedestrian alert sounds Closed

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that…

NHTSA #DP22005 · Electrical System · opened Jan 2023 · closed Aug 2023

Loss of Motive Power Closed

The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021. The Petitioners cited examples of complaints indicating that the s…

NHTSA #DP22003 · Engine · opened Sep 2022 · closed Dec 2023

Engine Fires Closed

On March 29, 2019, the Office of Defects Investigation (ODI) opened two Preliminary Evaluations (PE19-003 on Hyundai and PE19-004 on Kia) to broadly investigate incidents of non-crash fires (regardless of origin or operational status of the vehicle) on various model year Hyundai and Kia vehicles.  During the PE investigations, Hyundai and Kia issued several recalls to address vehicle fires, including those due to eng…

NHTSA #EA21003 · Engine · opened Dec 2021 · closed Feb 2024

Electrical overstress Closed

The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect.  During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events. The subject vehicles may be equipped wi…

NHTSA #EA19001 · Air Bags · opened Apr 2019 · closed Sep 2024

An investigation means NHTSA is examining a possible defect — it is not a recall, and many close without one.

Manufacturer service bulletins 170

Technical notes the manufacturer sent to dealers about known issues and fixes. Useful to mention to a mechanic — they are not recalls and repairs may not be covered. Showing the 10 most recent of 170.

TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information…

Bulletin TSB_CLI049_R2 · Electrical System, Visibility/wiper · Aug 2026

TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black ba…

Bulletin CS2312_TSB_R2 · Structure · Jun 2026

VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS: ECM LOGIC IMPROVEMENT (SC340 REVISION 5) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin are…

Bulletin SC340_TSB_R5 · Engine · Apr 2026

VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 104 ) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Electronic Control Modu…

Bulletin SC340_OWNR_JF&JFA_104 · Electrical System, Engine · Mar 2026

TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSION SECM LOGIC IMPROVEMENT (SC340 REV 4) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black…

Bulletin SC340_TSB_R4 · Electrical System, Engine · Mar 2026

TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black ba…

Bulletin TSB_CS2312_R1 · Structure · Feb 2026

VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 103 / JF) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Electronic Control…

Bulletin SC340_OWNR_JF103 · Engine · Dec 2025

TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin provides information to install a Theft Deterrent Ignition Cylinder Protector on certain 2010-2022MY Kia vehicles out…

Bulletin TSB_CS2312 · Structure · Dec 2025

CUSTOMER SATISFACTION CAMPAIGN: OWNER NOTIFICATION (CS2312) - This document is the owner notification advising that Kia is conducting Customer Satisfaction Campaign. A software upgrade that addresses the social media theft method has been made available to own…

Bulletin CS2312_OWNR · Structure · Dec 2025

TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar i…

Bulletin SC340_TSB_R3 · Engine · Dec 2025

Source: NHTSA Office of Defects Investigation, listed for the OPTIMA PLUG-IN HYBRID FWD. Model-year data, not specific to one car.

2018 Kia optima plug-in hybrid trims & engines on record

Trims
PHEV EX
Engines
2.0L 4-cyl 154 hp

2018 Kia optima plug-in hybrid vehicles on record

Other Kia optima plug-in hybrid model years

2018 Kia optima plug-in hybrid — frequently asked questions

Does the 2018 Kia optima plug-in hybrid have any safety recalls?

NHTSA lists no safety-recall campaigns for the 2018 Kia optima plug-in hybrid. Whether an individual car still needs a recall repair depends on its VIN — check it on NHTSA.gov or ask a franchised dealer. Recall repairs are done at no charge.

What are the most common problems with the 2018 Kia optima plug-in hybrid?

Across all 243 owner complaints filed with NHTSA, the most-reported problem areas are engine, electrical system, power train.

What gas mileage does the 2018 Kia optima plug-in hybrid get?

The 2018 Kia optima plug-in hybrid has a U.S. EPA estimate of 40 mpg combined (38 city / 43 highway).

Sources: NHTSA (recalls, complaints, crash tests), U.S. EPA (fuel economy). Vehicle data only — CarLogs never shows owner information.