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Kia Optima Trunk Cargo Area Light Bulb Replacement Guide
How to change a burnt out cargo area light bulb in the trunk of a 4th generation 2016 to 2020 Kia Optima sedan.

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Paul B. Michaels
Author & Photographer
Auto Mechanic Since 1989

2019 Optima Trunk Light
Cargo Area Light Housing
Push In Release Tab
This automotive maintenance tutorial was specifically written to assist owners of the 4th generation (2016, 2017, 2018, 2019 and 2020 model years) Kia Optima sedan in changing a burnt out cargo area light bulb in the trunk.

Owners of other Kia, Hyundai or Genesis vehicles such as the Niro, Sportage, Sedona, Telluride, Sorento, Rio, Forte, Soul, K900, Cadenza, K5, Stinger, Tucson, Santa Fe, Kona, Palisade, Elantra, Sonata, Accent, Veloster, Ioniq, Nexo, Venue, G70, G80 and G90 may also find these DIY instructions to be helpful.

The compatible replacement festoon style light bulb part number is DE3175 which is available from various manufacturers such as Sylvania, GE, Bosch and Philips.

If you would like to have a brighter and much longer lasting cargo area light, install a DE3175 LED bulb.

The only tool needed to access and replace the light bulb is a small flat head screwdriver or a plastic pry bar tool.

The first step is to open the trunk lid. Then look on the ceiling of the cargo area to locate the light housing.

The housing is situated near the two trunk lid torsion bars.

Use the blade of your flat head screwdriver or a plastic pry bar tool to gently push in the release tab on the right (passenger) side of the light housing.


Pry Out Light Housing
Push In Release Tab
Disconnect Power Plug
Gently pry out the light housing from the ceiling of the cargo area.

Push in the release tab on the black plastic electrical connector before sliding it straight off the base of the light housing.

Allow the light housing to cool off for at least a minute or two.

Black Plastic Rear Cover
Pry Off Back Cover
Rear Cover Removed
Use the flat head screwdriver or a plastic pry bar tool to gently remove the black plastic cover on the back side of the housing.

Set the rear cover aside in a safe place.

Pull Back Metal Contact
Remove Old Light Bulb
Old Light Bulb Removed
If the old light bulb was recently turned on, be careful when you remove it. The old bulb might still be hot enough to burn your fingers.

Gently pull back the flexible brass metal electrical contact to release the old light bulb from the socket.

Push In New Light Bulb
Snap In Plastic Cover
Push On Power Plug
Push a new number DE3175 festoon style light bulb straight into the socket.

Make sure the new bulb is securely attached between the two electrical contacts.

If you would like to have a brighter cargo area light, install a compatible replacement DE3175 LED light bulb.

Slide the electrical connector straight in to the socket on the base of the light housing.

Re-Insert Wires & Tabs
Pop In Retaining Clip
Trunk Light Bulb Replaced
First, re-insert the wires and two plastic tabs on the left (driver) side of the housing back into the opening in the ceiling of the trunk.

Then gently snap in the plastic retaining clip on the right (passenger) side of the housing to secure it into place.

If the new light bulb didn't turn on as soon as you pushed in the electrical connector, re-activate the interior lights by pressing the "Unlock" button on the key fob or close and open the trunk.

Tip - If you installed an LED bulb and it doesn't work, try removing the bulb from the socket, rotate it 180 degrees and push it back into the socket again. Some LED bulbs are "polarized" and will only work when the "+" positive and "-" negative electrical contacts are in the correct orientation.

Be sure to write down the bulb change in your vehicle's service records.

Please check out all of my 2016-2020 Kia Optima DIY Repair & Maintenance Guides.

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
(Note: I am not a registered charity. Donations are not tax deductible.)


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