Problems · NHTSA complaints
2018 Kia Rio problems
Owners filed 28 complaints about the 2018 Kia Rio with NHTSA between Apr 2019 and Aug 2026. The most-cited component is engine (15).
Complaints
28
Filed with NHTSA
Crashes
3
Reported by owners
Fires
2
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Engine15
- Electrical system5
- Air bags5
- Fuel/propulsion system2
- Exterior lighting2
- Latches/locks/linkages2
- Seats1
- Structure1
- Engine and engine cooling1
- Service brakes1
- Power train1
- Steering1
- Other / unknown5
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Oct 28, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
2
3
4
3
4
6
5
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 4 |
| 2025 | 6 |
| 2026 | 5 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Engine
15 reports1 crash1 fire
“The Components that have malfunctioned are the airbags, exaust system, electrical systems, sensors, gaskets, and a few other things. We had 5 failed clockspring repairs. The first (3?) under warranty, we paid for another when they said it was our fault, then that mechanic said that it needed to go back to a dealership because it was defective. I advocated for months for it to be evaluated. No one at kia helped me despite this being a repeat warranty issue. I finally found a shop that would waive a diagnostic and he confirmed the issues atleast with the airbags- however in order to fully diagnose the engine they also needed to replace parts in order to perform an oil consumption test. While the represenative did approve the repairs for the airbag, they have not given the dealership an answear about ANYTHING engine related- we need an answear if we should be waiting or having it towed out of there. They have had it for a month. We repeatedly try to get ahold of them but they ignore when we call or email them. The represenative also made sexist comments about "being a woman" and its clear our safety concerns are not being handled serioursly. Just like with the…”
Electrical system
5 reports
“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. When the small mechanics hear about the issue they are confused because the type of motor I have was recalled in other cars for the same issues. My car just recently surpassed the warranty, I should not be having to still fight the dealership to have a car in working condition for the same problems they kept putting bandaid on during warranty repairs.”
Air bags
5 reports1 crash
“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. This is a major safety issue, when you buy a car you expect that the airbags and corresponding electrical equipment last you for the life of the car or until there is an accident.”
Fuel/propulsion system
2 reports1 crash1 fire
“My 2018 Kia Rio actually lit up on fire as I was driving down the highway on way to work. As I drove down the highway, I noticed that I had trouble using the brakes. It seemed as if they were working one second and then not working the next. At that time, I noticed fire coming from underneath the car and I was able to get the vehicle to the side of the road. As I was exiting the vehicle, the flames were coming up on either side of the driver and passenger doors. Within the next couple minutes the car exploded. Fire rescue put out the fire and the interstate was closed to all traffic. Since the incident, my family and I have done research and found several incidents with very similar stories with regard to what happened to the vehicle. I believe it is well documented that there is a problem with certain Kia models that involves some kind of deficiency in the brake line that can cause the puncture/severing of fuel line. The end result can include "loss of braking ability" and "potential fire hazard". Reading these other incident reports from other families was exactly the way the vehicle reacted in my own incident. I could've lost my life in this incident and I…”
Exterior lighting
2 reports
“Excessive oil consumption 1 quart every 1000 miles. The brake light socket overheats causing fast bulb burn outs.”
Latches/locks/linkages
2 reports1 related recall
“The contact owns a 2018 Kia Rio. The contact received notification of NHTSA Campaign Number: 21V622000 (Latches/Locks/Linkages) however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.