2003 Kia Optima Bulb Size
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Bulbs Chart
2003 Kia Optima Center High Mount Stop Light Bulb (921)
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Best Choice
Replace your standard car lights with our robust Philips Vision LEDs that deliver dynamic lighting for your vehicle, both inside and out. The innovative design and unmatched performance of Philips Vision LEDs are available for brake and taillights, backup lights, dome lights, and license plate lights. These bulbs are covered
Philips 12789LPB2 Bright White Vision
LED Lights
2003 Kia Optima License Plate Light Bulb (168)
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Premium Pick
The Xtreme White Plus Series of high output replacement bulbs give drivers better color recognition, depth perception, and improved contrast over stock halogen bulbs, all while meeting DOT specification. Xtreme White Plus bulbs feature a crisp white light output that allows for better road illumination, while a blue top coatPIAA Xtreme White Plus High Performance
Halogen Lights
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For Car Dome, Map Door, Courtesy, License Plate Lights
No polarity no flip: it is truly no polarity, can light on two sides, no need more modification or flip, plug and play, easy install within 5 minutes.Marsauto LED Light Bulb 6000K Replacement Bulbs
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Inexpensive But Reliable
Design. The 194 HP3 LED bulb is a compact, simple LED replacement with proven performance. The single diffused optic spreads light in the original lamp, for OEM-style appearance and function. With its dual-lead contacts, it will fit snugly in the socket, and its light weight means it won't vibrate loose over...Diode Dynamics HP3 LED Bulbs
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Extremely Bright
Product benefits: Non-polarity design, 500% brighter than original halogen bulb, aircraft grade aluminum heat sink with Low temperature for Longer life span & Low Power Consumption (Up to 50,000 Hours Service Life).iBrightstar T10 168 LED Bulbs
LED Lights
2003 Kia Optima Back Up Reverse Light Bulb (921)
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Best Choice
Replace your standard car lights with our robust Philips Vision LEDs that deliver dynamic lighting for your vehicle, both inside and out. The innovative design and unmatched performance of Philips Vision LEDs are available for brake and taillights, backup lights, dome lights, and license plate lights. These bulbs are coveredPhilips 12789LPB2 Bright White Vision
LED Lights
2003 Kia Optima Interior Door Light Bulb (168)
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Premium Pick
The Xtreme White Plus Series of high output replacement bulbs give drivers better color recognition, depth perception, and improved contrast over stock halogen bulbs, all while meeting DOT specification. Xtreme White Plus bulbs feature a crisp white light output that allows for better road illumination, while a blue top coatPIAA Xtreme White Plus High Performance
Halogen Lights
-
For Car Dome, Map Door, Courtesy, License Plate Lights
No polarity no flip: it is truly no polarity, can light on two sides, no need more modification or flip, plug and play, easy install within 5 minutes.Marsauto LED Light Bulb 6000K Replacement Bulbs
-
Inexpensive But Reliable
Design. The 194 HP3 LED bulb is a compact, simple LED replacement with proven performance. The single diffused optic spreads light in the original lamp, for OEM-style appearance and function. With its dual-lead contacts, it will fit snugly in the socket, and its light weight means it won't vibrate loose over...Diode Dynamics HP3 LED Bulbs
-
Extremely Bright
Product benefits: Non-polarity design, 500% brighter than original halogen bulb, aircraft grade aluminum heat sink with Low temperature for Longer life span & Low Power Consumption (Up to 50,000 Hours Service Life).iBrightstar T10 168 LED Bulbs
LED Lights
2003 Kia Optima Headlights
2003 Kia Optima Tail Lights
Kia Optima Bulb Size By Years
If you’re replacing a light on a 2003 Kia Optima, the bulb size chart is meant to remove guesswork. I created this list to match each lamp location with the recommended bulb type and socket, noting common trade-offs like brightness versus heat and lifespan. Use it as the starting assumption when ordering or working under the hood.
Follow the chart and validate fitment visually and by part number before installation. I recommend checking burn-in and alignment after fitting to avoid electrical or clearance constraints. These steps come from hands-on experience and practical troubleshooting.
Affiliate disclaimer: some links on this page are affiliate links, which means I may earn a commission at no extra cost to you. The chart stands on technical accuracy, not commission.
2003 Kia Optima specs
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