Is the 2018 Kia OPTIMA reliable?

The 2018 Kia OPTIMA has 325 complaints filed with NHTSA (0.4x the segment average). Our reliability verdict: average. Most common issue: ENGINE problems.

What are common problems with the 2018 Kia OPTIMA?

Top problems: ENGINE (139 complaints, avg repair $500); OTHER (38 complaints, avg repair $500); ELECTRICAL (33 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2018 Kia OPTIMA?

Yes, there are 2 recall(s): HYBRID PROPULSION SYSTEM, LATCHES/LOCKS/LINKAGES:TRUNK LID:LATCH. Contact any Kia dealer to verify if recalls have been completed on your specific vehicle.

How much does it cost to fuel a 2018 Kia OPTIMA?

The 2018 Kia OPTIMA gets 28 MPG combined. At current US average gas prices, driving 12,000 miles per year costs roughly $1714. See the interactive fuel cost calculator on this page for state-specific pricing.

Is the 2018 Kia OPTIMA often stolen?

The Kia OPTIMA was the #5 most-stolen vehicle in the United States in 2025 with approximately 13,900 thefts (NICB Hot Wheels data). Theft risk tier: very-high. Pre-2022 models are affected by the Kia Boys challenge — verify your VIN has the manufacturer security update.

How much does it cost to insure a 2018 Kia OPTIMA?

Estimated US average full-coverage insurance for the 2018 Kia OPTIMA is approximately $1,934/year (sedan-midsize class). Actual quotes vary heavily by state, driver age, driving record, and credit — see the interactive insurance estimator on this page for state-specific pricing.

2018 Kia OPTIMA

Problems, Recalls & Reliability Report

Average

Quick Summary

The 2018 Kia OPTIMA has 325 owner complaints filed with NHTSA — that's 0.4x the segment average of 771. The most common issue is engine problems (43% of all complaints), specifically: when i got in my car the check engine can on. i started driving my car to work, because i was not sure why this light came on because this was/is a new car. i have less than 19k miles on my car. as i attempted to get on the highway the car refused to speed up. the max that i could drive was 60 mph. . There are 2 recalls issued for this model year. ⚠️ 16 fire reports filed.

16 fire reports 4 crash reports 3 injuries

325

Total Complaints

Recalls Issued

5/5

Safety Stars

0.4x

vs Segment Avg

Known Problems(top 5 of 8)

ENGINE

139 complaints

43%

• WHEN I GOT IN MY CAR THE CHECK ENGINE CAN ON. I STARTED DRIVING MY CAR TO WORK, BECAUSE I WAS NOT SURE WHY THIS LIGHT CAME ON BECAUSE THIS WAS/IS A NEW CAR. I HAVE LESS THAN 19K MILES ON MY CAR. AS I ATTEMPTED TO GET ON THE HIGHWAY THE CAR REFUSED TO SPEED UP. THE MAX THAT I COULD DRIVE WAS 60 MPH.
• TAKARA RECALL VEHICLE POWER DOWN WHILE I WAS DRIVING 45 MPH ON A CITY STREET THE CAR WAS STATIONARY IN MOTION THEN POWERED BACK UP WITHOUT ME TURNING THE IGNITION.WAS A VERY SCARY EXPERIENCE
• ON 03/29/2019 WAS TRAVELING TO WORK. ON INTERSTATE 53 SOUTHBOUND CAR WENT TO LIMP MODE. NO POWER. MANAGED TO GET TO DEALERSHIP. THEY TRIED TO REPAIR MY VEHICLE FOR 1 MONTH AFTER THEY TOLD ME THAT ENGINE NEED TO BE REPLACED THEY MANAGED TO CHANGE WIRING HARNESS. AFTER 1 MONTH IT WAS DONE. I TOOK CAR

Typical onset: 50K miles Est. repair: $500🔥 9 fire reports💥 1 crashes

“WHEN I GOT IN MY CAR THE CHECK ENGINE CAN ON. I STARTED DRIVING MY CAR TO WORK, BECAUSE I WAS NOT SURE WHY THIS LIGHT CAME ON BECAUSE THIS WAS/IS A NEW CAR. I HAVE LESS THAN 19K MILES ON MY CAR. AS I ATTEMPTED TO GET ON THE HIGHWAY THE CAR REFUSED TO SPEED UP. THE MAX THAT I COULD DRIVE WAS 60 MPH. ”

— NHTSA complaint filing

When Problems Appear on the 2018 Kia OPTIMA

Based on 106 owner complaints that included an odometer reading. Median mileage at time of complaint: 42K miles. Most complaints cluster in the 0-30K miles range.

Overall complaint distribution by mileage

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

OTHER

In line with typicalmedian 25K mi · 9 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

BRAKES

In line with typicalmedian 30K mi · 8 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

TRANSMISSION

In line with typicalmedian 26K mi · 8 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

AIR BAGS

In line with typicalmedian 46K mi · 5 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

ELECTRICAL

Later than typicalmedian 39K mi · 8 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

STEERING

Later than typicalmedian 42K mi · 7 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

Mileage figures are self-reported by owners in NHTSA complaint filings. Peak bucket = the mileage range with the most complaints for that component; it reflects when owners noticed and reported problems, not necessarily when the fault first occurred.

Recalls (2)

HYBRID PROPULSION SYSTEM08/03/2018

Kia Motors America (Kia) is recalling certain 2017-2018 Kia Optima hybrid vehicles. These vehicles are equipped with a Voltage Protection Device (VPD), designed to protect the high voltage battery module, that may activate inadvertently.

Risk: If the VPD activates while the vehicle is being operated in Electric Vehicle (EV) mode, there may be a loss of power, increasing the risk of a crash.

Fix: Kia will notify owners, and dealers will remove the VPD switch and install two newly designed Battery Management Systems (BMS) that contain Overvoltage Protection Devices (OPDs), free of charge. The recall is expected to begin May 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC162.

Very high theft risk

#5 most stolen in 2025

The Kia OPTIMA was the #5 most-stolen vehicle in the United States in 2025, with approximately 13,900 thefts reported to law enforcement.

Kia Boys / TikTok theft vulnerabilityModel years 2010-2021 Hyundai and Kia vehicles without engine immobilizers were widely targeted starting in 2022 after a viral TikTok exploit. If you own this vehicle, verify it has an ignition immobilizer or install a security upgrade. Hyundai and Kia both offered free software updates and steering-wheel-lock programs for affected models.

Recommended protection: engine immobilizer verification, steering wheel lock, GPS tracker, and comprehensive insurance coverage. Higher theft risk usually translates to higher comprehensive-coverage insurance premiums.

Source: NICB Hot Wheels 2025 report + HLDI theft loss studies. Model-year ranking; not all years of this model have identical risk.

Fuel Cost Calculator for 2018 Kia OPTIMA

Live EIA prices

Annual miles driven: 12,000

Your state (affects local gasoline price)

Per year

$1,715

Per month

$143

Per mile

14.3¢

MPG

City driving (worst-case MPG)

$2,182/yr

Highway driving (best-case MPG)

$1,298/yr

Based on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.

5-Year Gas Price History

EIA weekly retail data · 2021 → today

Show:

Current

$4.00

5-year low

$2.78

5-year high

$5.01

Since 2021

+27%

Source: US Energy Information Administration weekly retail gasoline prices.

Estimated Insurance Cost for 2018 Kia OPTIMA

Estimate only, not a quote. Modeled from NAIC + HLDI averages for a hypothetical 35-year-old driver with clean record + full coverage. Your actual quote depends heavily on your age, driving history, credit, ZIP code, and insurer.

Your state (affects local premium average)

Full coverage / year

$1,934

Full coverage / month

$161

Liability only / year

$574

vs US avg

+16%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (sedan-midsize)0.96x

× theft risk1.28x

× safety rating0.94x

× vehicle age1.00x

= Full coverage estimate$1934

Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.

Maintenance & Warranty

Recommended Kia OPTIMA Service Intervals

Oil change

8K mi / 12 mo

Tire rotation

8K mi

Brake fluid

24 months

Transmission fluid

60K mi

Engine coolant

60K mi

Spark plugs

90K mi

Cabin air filter

15K mi

Engine air filter

30K mi

Differential (AWD/4WD)

60K mi

Turbo engines (Optima 2.0T, Sorento 2.5T) may benefit from more frequent oil changes.

"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.

Kia New-Vehicle Warranty Coverage

Bumper-to-bumper (basic)

5 yr / 60K mi

Powertrain

10 yr / 100K mi

Hybrid/EV battery

10 yr / 100K mi

Corrosion (rust perforation)

5 yr / 100K mi

Roadside assistance

5 yr / 60K mi

10 year powertrain not transferable to subsequent owners

These are the terms for a new Kia. If you're buying a used 2018 OPTIMA, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Kia dealer for VIN-specific remaining warranty.

Estimated Repair Costs

ENGINE(~50K mi)

$500

OTHER(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

TRANSMISSION(~50K mi)

$500

BRAKES(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 325 owner complaints for this specific year, here's what to check or ask about:

☐
ENGINE: WHEN I GOT IN MY CAR THE CHECK ENGINE CAN ON. I STARTED DRIVING MY CAR TO WORK, BECAUSE I WAS NOT SURE WHY THIS LIGHT CAME ON BECAUSE THIS WAS/IS A NEW CAR. I HAVE LESS THAN 19K MILES ON MY CAR. AS I ATTEMPTED TO GET ON THE HIGHWAY THE CAR REFUSED TO SPEED UP. THE MAX THAT I COULD DRIVE WAS 60 MPH.
Typically appears around 50K miles. Repair cost ~$500
☐
OTHER: THE VEHICLE IS STATIONARY. THERE IS NO EMERGENCY TRUNK RELEASE FROM THE INSIDE OF THE VEHICLE EXCEPT FROM INSIDE OF THE TRUNK. MY KEYS WERE STUCK INSIDE THE TRUNK THERE IS NO WAY TO OPEN IT. THE TRUNK RELEASE BUTTON FROM THE DRIVER SIDE DID NOT RESPOND. THE TRUNK RELEASE BUTTON FROM THE TRUNK ITSELF
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: THIS HAS OCCURRED ON 3 TIMES SO FAR. I WAS AT A GAS STATION FILLING UP THE TANK, THE KEY WAS IN THE IGNITION, THE CAR WAS IN PARK, THE ENGINE WAS RUNNING, AND MY CAR DOOR WAS CLOSED. WHEN I FINISHED GETTING GAS, I TRIED TO OPEN THE DRIVER SIDE DOOR AND IT WAS LOCKED. ALL DOORS WERE LOCKED. I WAS 2
Typically appears around 50K miles. Repair cost ~$500
☐
TRANSMISSION: SATURDAY, JANUARY 20, 18:55(APPROXIMATELY) AMHERST MASSACHUSETTS, 39 DEGREES FAHRENHEIT PARKED CAR, PULLED KEYS AND EXITED CAR TO HELP MY MOTHER EXIT. PARKED ON INCLINE, VEHICLE STARTED ROLLING BACK DOWN DRIVEWAY HAD KEYS IN POCKET AUTOMATIC TRANSMISSION VEHICLE TRIED MOVING BACK TO DRIVER DOOR
Typically appears around 50K miles. Repair cost ~$500
☐
RECALLS: Verify all 2 recalls have been completed — free at any Kia dealer
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)