YearToAvoid

2018 Kia Rio Reliability Data: Problems & Recalls

Best The 2018 Kia Rio ranks 15th worst of 19 model years, with a complaint index of 22 and a Best verdict relative to other Rio years. NHTSA lists 28 complaints, 1 recall, 3 crashes, and 2 fires, with Engine problems making up 57% of complaints.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
22/100
#15 of 19 Rio years
Verdict
Best
vs. other years of this model
Complaints
28
unique NHTSA reports
Recalls
1
distinct NHTSA campaigns
Crashes
3
reported in complaints
Fires
2
Injuries
1
Top issue
Engine
Best nearby year
2021
rated Best
NHTSA overall rating
Not rated
EPA combined MPG
32
28.5 city / 37 hwy
Injuries / deaths
1 / 0

Top 2018 Kia Rio problems

Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.

  1. Engine16 (57%)
  2. Electrical System6 (21%)
  3. Airbags5 (18%)
  4. Other5 (18%)
  5. Structure & Body4 (14%)
  6. Fuel System2 (7%)
  7. Brakes1 (4%)
  8. Steering1 (4%)
  9. Transmission & Powertrain1 (4%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Owners report excessive oil consumption, sometimes needing a quart added every 1,000 miles.
  • Some engines lost oil entirely between changes, leading to knocking noises and eventual rod failure.
  • One owner reported the engine caught fire after making abnormal noise while driving on the highway.
  • The trunk latch has failed to open, sometimes tied to a recall repair with unavailable replacement parts.
  • A steering wheel locked up during low-speed parking maneuvers shortly after purchase.
  • Airbags reportedly failed to deploy in a head-on collision with a deer.
2018 Kia Rio complaints: complaints filed per month2Apr 2019Oct 2021Dec 2022Feb 2024Mar 2025Nov 2025Aug 2026
28 complaints filed with NHTSA from Apr 2019 to Aug 2026; peak Dec 2022 (2).

2018 Kia Rio recalls

1 NHTSA recall campaign list this model year.

  1. NHTSA 21V622000Aug 9, 2021Structure & Body253,074 vehicles

    Latches/locks/linkages:trunk lid:latch

    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.

    Remedy: 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.

2018 Kia Rio fuel economy and fuel cost

City
28.5 MPG
Highway
37 MPG
Combined
32 MPG
Annual fuel cost (EPA)
$2,050
15,000 mi/yr
Fuel
Regular
Current regular gas
$4.32/gal
national avg.

EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.

2018 compared with other Rio years

Complaint Index by model year (0 = fewest issues, 100 = most)0255075100’05’06’07’08’09’10’11’12’13’14’15’16’17’18’19’20’21’22’23
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2016Avoid8377231
2017Caution3931231
2018Best2228132
2019Good3321132
2020Avoid9427136

All Kia Rio years: best and worst →

Frequently asked questions

Is the 2018 Kia Rio reliable?
Relative to other Rio model years, the 2018 ranks well: it has a complaint index of 22, the 15th worst (so among the better years) out of 19 years tracked, earning a Best verdict.
What are the most common problems with the 2018 Kia Rio?
NHTSA complaints point mainly to the Engine, accounting for 57% of complaints (16 of 28), including reports of excessive oil consumption and one engine fire.
Does the 2018 Kia Rio have any recalls?
Yes, one recall (21V622000) covers a trunk latch that may become damaged and prevent the trunk from opening from inside. It is not a do-not-drive recall.
How does the 2018 Rio compare to other bad Rio years?
The 2018 Rio's complaint index of 22 is much lower than the worst years, such as 2013 (index 100) and 2020 (index 94), both rated Avoid.
What is the fuel economy of the 2018 Kia Rio?
EPA rates the 2018 Rio at 32 mpg combined (28.5 city / 37 highway), with an estimated annual fuel cost of $2,050.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.