Kia Optima Headlight Bulb Size

Additional Notes

• The H1 bulb is the high beam fitment for the Kia Optima across the 2006-2013 model years, making it the most consistently used high beam type in these specifications. H1 is a single-filament halogen bulb with a P14.5s base, operating typically at 55 watts.
• The H7 bulb appears in both high beam and low beam positions across multiple Optima model years, including 2001-2002, 2005, 2017-2018 for high beam, and 2001-2007 for low beam. H7 is a single-filament halogen bulb with a PX26d base, commonly rated at 55 watts.
• The 9005 bulb is used in both the high beam and low beam positions for the 2019 Optima, and in both positions for the 2020 model specifically with halogen capsule headlamps. The 9005 uses an SB-P22d base and is rated at 65 watts for high beam applications.
• For the 2017-2018 Kia Optima, high beam fitment depends on headlamp type. Vehicles equipped with single projector-type headlamps use the 9005, while other configurations use the H7. These two bulbs are not interchangeable due to differing base designs.
• The D1S bulb is listed as the low beam fitment for the 2011-2013 Optima when equipped with HID headlamps. D1S is a discharge bulb that operates at high voltage and is not interchangeable with halogen types such as H11B, which serves the same low beam position on non-HID versions of those same model years.
• The H11B is the dominant low beam bulb across the 2008-2013 Optima model years, with halogen capsule headlamp variants of 2011-2013 also using it. H11B is a single-filament halogen bulb with a modified PGJ19-2 base that is not compatible with the standard H11 despite their similar appearance.
• The 2007 Optima low beam fitment changed within the production year itself. Early model vehicles use the H7, while late model vehicles use the H11B. These two bulbs have different base types and are not interchangeable.
• The 9011 bulb is the high beam fitment for the 2003-2004 Optima. The 9011 is a high-intensity halogen bulb with an SB-P22d-1 base, and it is not a direct substitute for the more common 9005 despite sharing a similar application category.
• Across the full span of these specifications, the Optima uses at least six distinct bulb types in the high beam position alone: H1, H7, H11B is not among them, but 9005, 9011, and D1S appear in related positions, reflecting changes across generations and trim configurations rather than a single standardized fitment.
• The 2018 low beam position lists both H7 and 9005 as fitments for the Kia Optima, corresponding to different headlamp configurations. Because these bulbs use incompatible bases, selecting the correct type requires confirming the specific headlamp assembly installed on the vehicle.