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2018 Kia Optima Plug-in Hybrid
Solid pick. The public record on this car is clean for its age. Inspect it, then negotiate with confidence.
240 owner complaints · 0 recalls · data verified July 21, 2026 · source: NHTSA
Why buy?
Engine problems dominate (56% of complaints, typically reported near 3k miles).
Zero recalls, rare for a car this age.
Score breakdown, by factor
Full methodology →#279 of 487Among the 2018 models with a matured record, the 2018 Kia Optima Plug-in Hybrid ranks #279, scoring higher than 41% of them. See the 2018 ranking →
Complaints filed per year
Fading = early teething worked out. Climbing = problems aging in.
How it crashes
NHTSA’s own crash tests, separate from the reliability score above.
NHTSA crash-tested this model year but didn’t publish an overall star rating for it.
4 open NHTSA defect investigations on file for this model year, separate from the recalls above.
Source: nhtsa.gov/ratings. Star ratings compare vehicles within the same class and size, not across every car on the road.
The road ahead
What breaks on a 2018 Kia Optima Plug-in Hybrid, plotted where owners report it happening.
Also reported (mileage varies): Brakes (17) · Engine & cooling (14) · Fuel system (14)
Mileage medians come from owners who mentioned an odometer reading in their NHTSA complaint, a rough guide, not a schedule.
Engine
56%135 complaints · typically near 3k mi · 49 in the last 2 years
“The car burns oil within a week of getting an oil change. It was only driven a 200 miles before all of the oil was burned out. This has been a consistent issue with th…”
Electrical system
15%37 complaints · typically near 38k mi · 11 in the last 2 years
“I was sold an unsafe vehicle at J and J Auto house 6446 Wilshire Bl LA,CA 90022. Dealer withheld condition of car . Had car three months and was stranded on highway. C…”
Transmission & drivetrain
8%20 complaints · typically near 12k mi · 4 in the last 2 years
“It burns oil constantly. I constantly have to get new filters put on because they become black very quickly same with the oil itself. The engine has a tic and I know o…”
Brakes
7%17 complaints · 4 in the last 2 years
“Purchased vehicle from a used car dealership. Had it a few months before brake pedal started losing pressure and going to floor. Had master cylinder replaced. A few mo…”
Check it against this car’s mileage
Type the odometer reading on the actual car you’re looking at to see which of these problem areas owners tend to report before it, around it, or after it.
We can place 3 of this model's commonly reported problem areas against a mileage. Nothing is stored.
Read all 240 owner complaints in their own words → · just the 21 crash/fire/injury reports →
Recalls (0)
No recall campaigns on file for this model year.
Questions to ask the seller
Questions worth asking the seller of this Kia before you buy, drawn from its public record:
- Owners of this model report engine problems more than anything else (owners tend to report it near 3k miles). Has this car shown any engine symptoms, and are there repair records for it?
- Owners of this model report electrical system problems more than anything else (owners tend to report it near 38k miles). Has this car shown any electrical system symptoms, and are there repair records for it?
- Has this car been in any accident or had any structural, airbag, or flood-related repair? Do you have a clean title and a recent history report (Carfax / AutoCheck)?
- How many owners has it had, do you have the maintenance records, and why are you selling it?
- Are you open to me having an independent mechanic inspect it before we settle on a price?
Before you hand over money
Check the VIN for open recalls
NHTSA’s free lookup shows whether this exact car had its recall remedies completed.
Free NHTSA VIN check ↗Get a pre-purchase inspection
A $150 to $250 independent inspection of this exact 2018 Kia OPTIMA PLUG-IN HYBRID beats every score on the internet, including ours.
What to ask forNot set on the 2018? See how every Optima Plug-in Hybrid model year scores →
Cross-shopping? Compare the 2018 Kia Optima Plug-in Hybrid against another car →
What owners say
Real owners of this exact model-year, shown separately from the NHTSA score. If they disagree, that’s worth knowing.