Kia Optima Interior Door Bulb Size

The Kia Optima interior door light utilizes a 168 bulb size for illumination within the vehicle cabin area. Data for the specific component covers the range from 2001 to 2005.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2001-2005	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Kia Optima uses the 168 bulb size for the interior door position across the 2001-2005 model years.
The 168 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used in both the United States and Canada.
This bulb is a miniature wedge type, designated T10, which refers to its wedge-base form factor that allows it to be inserted and held in place without a separate metal base or socket pins.
The 168 operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles.
Its rated wattage of 4.9W places it in the low-power range typical of interior courtesy and door lighting applications, where heat output and current draw are kept minimal.
The T10 wedge base is a widely used form factor, and bulbs carrying this designation from different manufacturers are generally interchangeable as long as voltage and wattage ratings are observed.