For the 2003 Kia Rio, both the low-beam and high-beam headlights use a 9003 bulb. The supplied fitment data does not list separate applications for projector and non-projector headlights, so no headlight-type distinction is specified here.
If equipped, the fog lights use 881 bulbs. Front turn signals, parking lights, and front side markers use 2357A. At the rear, the tail and brake lights use 2357R, while the rear turn signals use 1156A and the reverse lights use 1156.
Center stop light fitment varies: 168 and 917 are listed, with 1156 additionally specified for the sedan. License plate lighting may use either 168 or 917. Rear side markers use 168NA. Confirm the existing bulb and body style before ordering, particularly for the center stop and license plate applications.