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2018 Kia Rio
Solid pick. The public record on this car is clean for its age. Inspect it, then negotiate with confidence.
27 owner complaints · 1 recalls · data verified July 14, 2026 · source: NHTSA
Why buy?
Engine problems dominate (52% of complaints).
Very few owner complaints for its age and sales volume.
The math, shown
Full methodology →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.
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 Rio, plotted where owners report it happening.
Also reported (mileage varies): Engine (14)
Mileage medians come from owners who mentioned an odometer reading in their NHTSA complaint, a rough guide, not a schedule.
Engine
52%14 complaints · 7 in the last 2 years
“Vehicle has excessive oil consumption defect acknowledged in Kia TSB ENG222. Repeated catalytic converter failures indicate potential overheating risk similar to 2019 …”
Electrical system
15%4 complaints · 2 in the last 2 years
“Auto theft alarm listed as standard. There is NO THEFT DETECTION AT ALL. There is only a bogus flashing led that does nothing when parked. This is fraud.”
Airbags
15%4 complaints · 3 in the last 2 years
“My car is a 2018 Kia Rio that has a clean history and has never been in an accident. Recently my airbag light came on and I had a diagnostic run that showed a B1448 co…”
Fuel system
7%2 complaints
“On 10/02/2021 - Was at a stop, put car in drive press the peddle car accelerated at high speed, miss another car and hit tree. Accident cause by acceleration issue wit…”
Recalls (1)
Safety recall repairs are free at the brand’s franchised dealers. Before buying, run the VIN at nhtsa.gov/recalls and make the seller show the work was done.
Latches/locks/linkages · 21V622000
Kia Motors America (Kia) is recalling certain 2016-2018 Forte 4-door, Forte Koup 2-door, and 2018-2019 Rio 4-door vehicles. The trunk latch may become damaged, preventing the opening of the trunk from the inside. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 401, "Internal Trunk Release."
Risk: A person inside the trunk compartment may become trapped, increasing their risk of injury.
Fix: Dealers will replace the trunk latch assembly, free of charge. Owner notification letters were mailed on February 10, 2022. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC216.
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 RIO beats every score on the internet, including ours.
What to ask forNot set on the 2018? See how every Rio model year scores →
Cross-shopping? Compare the 2018 Kia Rio 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.