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EnginePart report

2018 Kia Optima Phev Engine Problems

Complaints
3about this part
Share
38%of 8 total for the year
Median mileage
19,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 3 complaints about the engine of the 2018 Kia Optima Phev, 38% of the 8 complaints for this model year. Where a mileage was given, the median is 19,000 miles. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I was told by the dealership that my 2018 Kia Optima Phev was repaired but after I drove it off the lot and got on the freeway the warning light came on again and lost all power. I almost got into another accident because of this. The dealership said they worked with Kia technical support to fix my car but apparently Kia doesn't know what's wrong with their own car. The vehicle has only 19k miles. I'm afraid for my safety and my families that this will continue to happen.”

NHTSA complaint #11398068, filed 2021-02, 19,000 miles

“Error message check hybrid system. Turn off engine with yellow caution triagle showing exclaimation point and hev came on, at highway speed vehicle dropped to from 65 MPH to 40 MPH suddenly, exited freeway, turned car off and restarted...vehicle had loss of propulsion, would not go over 20 MPH. Stop, at stop sign, and when I applied gas, the vehicle would not go over 10 MPH...once safely off the road, I turned engine off, towed to dealer. Dealer could not duplicate. 1 day after picking up the vehicle from dealer, same problem occurred. …”

NHTSA complaint #11219554, filed 2019-06, 11,000 miles

“When I was driving on the highway on 2/14/2011 a check hybrid system warning came on, check engine light, triangle hev light, a red battery light came on and car lost engine power. After my vehicle slowed traffic down due to not having power I was barely able to pull over to the side of the road by coasting the car to the shoulder. It would not accelerate what so ever not even with just the engine power. When I pulled over the big check hybrid system warning dissapeared and only the check engine light and triangle hev light stayed on. I had my children in the car and almost caused an accident. …”

NHTSA complaint #11396321, filed 2021-02, 19,000 miles

Related recalls

Engine: other model years

YearComplaintsShare of year
2018338%
20171148%

Other parts of the 2018 Kia Optima Phev

Electrical system
3 complaints
Other or unknown
2 complaints
Engine cooling
1 complaints
Steering
1 complaints
Transmission and drivetrain
1 complaints
Visibility (wipers, defrost, mirrors)
1 complaints

← All problems reported for the 2018 Kia Optima Phev

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology