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 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.

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.

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

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

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.

Make sure the bulb socket is securely attached.

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 the pop rivets into the wheel well liner.

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

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.