2004 Kia Optima bulb fitment starts with the headlights: the supplied data lists a 9011 bulb for the high beam. No low-beam bulb is provided, so confirm the original bulb and headlight assembly before ordering a replacement. No projector or non-projector headlight distinction is specified for this model year.
- Front turn signal and parking light: 2357
- Front and rear side markers: amber 168NA
- Rear turn signal: amber 1156A
- Tail and brake lights: red 2357R
- Reverse light and center stop light: 921
- License plate and interior lighting may use 168 or 917, depending on the socket.
- Map lights require comparison with the original bulb: 64111 or 64113.
The dome light uses 6461, and the trunk light uses 6418. Check the removed bulb and socket wherever multiple options are listed.