YearToAvoid

2018 Kia Rio Engine Problems

Engine problems account for 16 of 28 total complaints (57%) on the 2018 Kia Rio, including 2 fires and 1 injury. Owners report excessive oil consumption, stalling, and full engine failure at a median mileage of 106,158. NHTSA lists no related recalls for this issue on this model year.

Engine complaints
16
57% of 28
Crashes reported
1
Fires reported
2
Injuries reported
1
Median mileage
106,158 mi
Related recalls
0

Typical engine symptoms owners report

  • Owners report excessive oil consumption, sometimes needing a quart added every 1,000 miles or less, that gets progressively worse over time.
  • Some describe the engine stalling on the highway with warning lights (oil, battery, check engine) illuminating together.
  • Several report sudden engine failure or seizure, in some cases diagnosed as a thrown rod, bearing failure, or cylinder misfire requiring full engine replacement.
  • One owner reported the engine emitting abnormal noise at highway speed followed by a fire near the front of the engine.
  • Owners mention low oil pressure readings and milky oil residue accompanied by white or black exhaust smoke before the engine died.
  • One complaint links the oil consumption issue to a low compression reading on a cylinder, leading to engine failure despite regular maintenance.

When 2018 Kia Rio engine complaints were filed

First complaint Oct 14, 2021, latest Aug 5, 2026.

2018 Kia Rio engine complaints: complaints filed per month2Oct 2021Jun 2023Feb 2024Jun 2024Mar 2025Oct 2025Mar 2026Aug 2026
16 complaints filed with NHTSA from Oct 2021 to Aug 2026; peak Oct 2025 (2).

Engine recalls for the 2018 Kia Rio

No safety recalls on record for this model year.

Engine complaints by Rio model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

  1. 20105 (19%)
  2. 20119 (38%)
  3. 201229 (54%)
  4. 201359 (39%)
  5. 201425 (48%)
  6. 201529 (56%)
  7. 201642 (55%)
  8. 201711 (35%)
  9. 201816 (57%)
  10. 20197 (33%)
  11. 20205 (19%)
  12. 20212 (13%)
  13. 20221 (9%)
  14. 20233 (25%)

Frequently asked questions

Are engine problems common on the 2018 Kia Rio?
Yes. NHTSA lists 16 engine complaints out of 28 total complaints for the 2018 Kia Rio, a 57% share, which is the highest share among all Rio model years in this dataset.
What is the typical mileage when the engine fails?
NHTSA data shows a median mileage of 106,158 at the time of failure for engine complaints on the 2018 Kia Rio.
Is there a recall for the 2018 Kia Rio engine?
No. NHTSA lists no related recalls for the engine issue on the 2018 Kia Rio.
Have engine problems caused fires or crashes?
NHTSA complaint data for the 2018 Kia Rio engine problem area includes 2 fires, 1 crash, and 1 injury.

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.