For the 2018 Kia Rio, headlight bulb fitment depends on whether the vehicle has projector-type headlights. With projector-type headlights, both the low beam and high beam use a 9005 bulb. Without projector-type headlights, both functions use a 9003 bulb. Check the headlight design before ordering, since the low- and high-beam sizes change together.
- Front turn signals use 7507 with projector-type headlights or 2357A without projector-type headlights.
- Brake and tail lights are LED with projector-type headlights; non-projector versions use 7528 bulbs.
- Front and rear side markers are LED with projector-type headlights. Without projectors, they use either 2825 or 98.
- The rear turn signal uses 7507, and the reverse light uses 921.
- Center stop and license plate lighting use 2825 or 98.
- Interior fitment includes 6461 for the dome, trunk, and vanity lights; the glove box uses 6418. Map light options are 194 and 7441.