Owners of other Kia and Hyundai vehicles with similar dome light housings such as the Forte, Cadenza, Rio, Soul, Sedona, Sorento, Sportage, Sonata, Accent, Elantra, Veloster, Azera, Tucson, Santa Fe and Genesis may also find these DIY instructions to be helpful.

A replacement "festoon" or "fuse" style dome light bulb is part number DE3175 (31mm in length) from manufacturers such as Sylvania, Osram, GE, Philips, Eiko and PIAA.

You may also use the # 6418 (35mm), the slightly longer # 6411 (41mm) or a compatible DE3175 LED unit.

The only tool needed to change the bulb is a small flathead screwdriver used to pry out the translucent plastic lens cover.

Carefully insert the blade of the small flathead screwdriver in between the lens cover and the dome light housing at one of the two small notches on the front edge.

Gently pry out the lens cover and set it aside in a safe place.

You may need to re-insert the screwdriver in to the other notch in order to pry out the cover. The cover should pop out relatively easily so avoid using excessive force.

Grasp the old bulb with your thumb and forefinger before pulling it straight out of the socket.

If you use a larger # 6418 (35mm), 6423 (36mm) or 6411 (41mm) bulb, just gently bend back the metal electrical contacts until they securely hold the metal end caps on the new bulb.

You may also use a brighter LED unit. (Tip: If the LED bulb doesn't work at first, try flipping it around in the socket.)

Re-insert the two tabs on the rear edge of the lens cover in to the dome light housing first.

Test the new bulb by moving the rocker switch to the "On" position.

Set the "On / Door / Off" switch to the "Door" position so that the dome light will illuminate whenever a passenger door is open.

For more, check out my other Kia Optima Repair & Maintenance Guides.