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Kia Optima Front Turn Signal Light Bulbs Replacement Guide
How to change a burnt out front turn signal light bulb in a 4th generation 2016, 2017, 2018, 2019 & 2020 Kia Optima.

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Paul B. Michaels
Author & Photographer
Auto Mechanic Since 1989

2019 Optima Front Signal
Turn Front Wheels
Black Wheel Well Liner
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 front turn signal light bulb located in the separate housing below the headlight assembly attached to the lower part of the front bumper cover.

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 bayonet style light bulb part number is 1156A or 1156NA which are available from various manufacturers such as Sylvania, Bosch and Philips.

The owner's manual lists 2357NA as being the compatible front turn signal light bulb part number even though this 2019 Optima LX FE actually contained 1156A bulbs.

If you would like to have brighter and much longer lasting front turn signal lights, install some 1156A LED or 2357NA LED bulbs.

The tools needed to access and replace the bulbs include a small flat head screwdriver or a pop rivet removal tool and a 10mm socket with a 1/4" drive ratchet.

The first step is to turn the steering wheel all the way in the opposite direction of the burnt out front turn signal light bulb.

Turning the front wheels will create more working room in the wheel well in order to access the bulb through the plastic wheel well liner or "splash guard".


Pry Out Button - Unlock
Remove Pop Rivet
Second Pop Rivet
Locate the three round black plastic pop rivet fasteners along the front outer edge of the wheel well liner.

Pry out the smaller round button head on the pop rivets with the blade of the flat head screwdriver.

Then pry out the base of the fastener with the screwdriver or use a pop rivet removal tool.

Third Pop Rivet
Under Bumper Cover
Loosen Counterclockwise
Repeat the process to remove the other two pop rivets.

Set the three pop rivets aside in a safe place.

Then look under the front bumper cover near the wheel well liner.

Remove the single black metal screw at the outer edge of the plastic panel under the bumper cover.

Rotate the screw in the counterclockwise direction with a 10mm socket and a 1/4" drive ratchet.

Black Screw Removed
3 Pop Rivets & 1 Screw
Pull Back Splash Guard
Set the screw aside with the three pop rivets.

Gently pull back the plastic wheel well liner towards the tire.

Access Back of Housing
Turn Signal Bulb Socket
Bulb Socket Removed
Locate the red / orange colored plastic bulb socket.

Rotate the base of the bulb socket 1/4 turn in the counterclockwise direction before pulling it straight out of the housing.

Push Down 1/4 Turn CCW
Old Light Bulb Removed
Push In - 1/4 Turn CW
Push the old light bulb straight down into the socket and rotate it 1/4 turn in the counterclockwise direction before pulling it straight out of the socket.

Push a new "bayonet" style number 1156A or 2357NA amber colored light bulb down into the socket and rotate it 1/4 turn in the clockwise direction to secure it into place.

If you would like to have brighter and much longer lasting lights, install some compatible replacement 1156A LED or 2357NA LED bulbs.

New Bulb In Socket
Empty Light Housing
1/4 Turn CW - Lock
Re-insert the bulb socket into the housing and rotate it 1/4 turn in the clockwise direction to secure it into place.

Make sure the bulb socket is securely attached.

Replace Wheel Well Liner
Spin In Black Screw
Tighten Clockwise

Push the wheel well liner back into place.

Replace the black metal screw into the underside of the front bumper cover to secure the outer edge of the under engine cover to the wheel well liner.

Tighten the screw in the clockwise direction with the 10mm socket and a 1/4" drive ratchet.

Re-Insert Pop Rivets
2016-2020-Kia-Optima-Front-Turn-Signal-Light-Bulbs-Replacement-Guide-026 2016-2020-Kia-Optima-Front-Turn-Signal-Light-Bulbs-Replacement-Guide-027
Pop In Button - Lock
Make sure the pins and button heads on the pop rivets are in the out and released position.

Re-insert the pop rivets into the wheel well liner.

Push in the button heads and pins to lock them into place.

Third Pop Rivet
Splash Guard Secured
Test New Turn Signal
To test the new front turn signal light bulb, activate the hazard signals.

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. 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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