Most common 2018 Kia Rio problems
Share of the 28 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Kia Rio complaints by model year
Best Rio years: 2011, 2022, 2010. Years to avoid: 2013, 2016, 2001, 2002, 2003. Compare all years →
2018 Kia Rio recalls (1)
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.
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.
What 2018 Kia Rio owners say
Engine & cooling
The contact owned a 2018 Kia Rio. The contact stated that while driving on the highway at 85 MPH, the engine emitted abnormal noise with no warning lights illuminated. The contact proceeded to exit the highway and enter a gas station parking lot, and upon exiting the vehicle, it was apparent that the engine had begun to catch on fire. The location of the fire was the front engine compartment. The fire was extinguished by bystanders using fire extinguishers. A fire department report was not filed. A police report was filed. The vehicle was destroyed. No injuries were reported. The local dealer was contacted however, the vehicle was not diagnosed as the vehicle was reported a total loss. The manufacturer was notified of the failure. The approximate failure mileage was 110,000.
The contact owns a 2018 Kia Rio. The contact stated that while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. The vehicle was restarted. The vehicle was taken to an independent mechanic, where it was diagnosed with a cylinder #1 misfire. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The dealer was contacted but the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 102,316.
Electrical system
The first problem part is the airbag. The clockspring was fixed twice under warranty. Then the dealership said they wont keep doing it and blamed me wrongly. I had a private mechanic repair the same part twice due to the code it was giving but it turns out thats not what's wrong with it. The entire airbag and electrical components are bad, that is why the two repairs the dealership as well as the private mechanic made did not work. We also have some engine problems they wont continue to fix because my warranty is now surpassed. The car burns through 20 quarts of oil in between changes, it has no leaks. It has so much carbon buildup. They replaced a gasket and thats another part that has continually needed replaced but they did not fix the issue that has caused it to go bad. …
Took my car in as the airbag light on the dashboard kept turning on and off- with or without a passenger in the seat. The dealership ran a diagnostic inspection and turns out that the passenger side OCS Mat and ECU are faulty and need to be replaced (DTC codes B176700 and B17672F). I have not been in a crash and there are no obvious signs of damage to the seat that might have caused this. There's no active recall for this but it does seem that one other person has reported issues with the passenger airbag system and I know other Kia models have had recalls in the past. The car had about 90,000 miles on it when this issue started and it's up to date on all maintenance but I was quoted over $3000 to fix this which is essentially the value of my car now, totaling the vehicle even though it has no other issues. …
Air bags
The first problem part is the airbag. The clockspring was fixed twice under warranty. Then the dealership said they wont keep doing it and blamed me wrongly. I had a private mechanic repair the same part twice due to the code it was giving but it turns out thats not what's wrong with it. The entire airbag and electrical components are bad, that is why the two repairs the dealership as well as the private mechanic made did not work. We also have some engine problems they wont continue to fix because my warranty is now surpassed. The car burns through 20 quarts of oil in between changes, it has no leaks. It has so much carbon buildup. They replaced a gasket and thats another part that has continually needed replaced but they did not fix the issue that has caused it to go bad. …
Took my car in as the airbag light on the dashboard kept turning on and off- with or without a passenger in the seat. The dealership ran a diagnostic inspection and turns out that the passenger side OCS Mat and ECU are faulty and need to be replaced (DTC codes B176700 and B17672F). I have not been in a crash and there are no obvious signs of damage to the seat that might have caused this. There's no active recall for this but it does seem that one other person has reported issues with the passenger airbag system and I know other Kia models have had recalls in the past. The car had about 90,000 miles on it when this issue started and it's up to date on all maintenance but I was quoted over $3000 to fix this which is essentially the value of my car now, totaling the vehicle even though it has no other issues. …
2018 Kia Rio engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 1.6L 4-cyl | 6-speed automatic | FWD | 28 / 37 / 32 |
| 1.6L 4-cyl | 6-speed manual | FWD | 29 / 37 / 32 |
EPA ratings. Class: Compact car.
Frequently asked questions
Is the 2018 Kia Rio a good car?
Based on 28 owner complaints filed with NHTSA, the 2018 Rio rates average: 19% fewer complaints than a typical year of the Rio at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2018 Kia Rio?
The engine & cooling — 16 complaints, 57% of all complaints for this model year. Next are the electrical system (5) and air bags (5).
How many recalls does the 2018 Kia Rio have?
There is 1 recall for the 2018 Kia Rio, the most recent from August 9, 2021 (latch). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Kia Rio?
The best years by complaints, compared at the same age, are 2011, 2022 and 2010. Years to avoid or approach with caution: 2013, 2016, 2001, 2002 and 2003. See the full Kia Rio years comparison.
At what mileage do 2018 Kia Rio problems happen?
The median mileage reported in complaints is about 54,000 miles; 50% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.