2018 Kia Optima misfire / rough idle reports
11 NHTSA complaints describe misfiring cylinders or rough idling on the 2018 Kia Optima — roughly 5% of all complaints for this model year.
11
Misfire / rough idle reports
5%
share of complaints
44,163 mi
median reported incident mileage (all complaints)
Components reported on this vehicle
Misfire / rough idle in other Optima years
| 2019 Optima | 6 |
| 2017 Optima | 7 |
| 2016 Optima | 29 |
Other symptoms owners describe on the 2018 Kia Optima
Symptom counts come from keyword analysis of complaint narratives. One complaint can describe several symptoms, and classification is approximate — read the underlying reports on the full 2018 Kia Optima report before drawing conclusions.