Kia Forte5 front side marker bulb uses 168 size while rear side marker bulb uses 2357 size. Replacement chart covers 2014 to 2018 production years with bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Kia Forte5 uses two distinct bulb types across its side marker positions: the 168 for front side markers and the 2357 for rear side markers, covering the 2014-2018 model years in both cases.
The 168 bulb follows the ANSI standard recognized in both the US and Canada, and is a miniature wedge-base type in the T10 form factor, rated at 12V and 4.9W.
The T10 wedge base of the 168 bulb connects by friction fit rather than a twist or pin mechanism, which is a defining characteristic of the wedge-base design.
The 2357 bulb also conforms to the ANSI standard for the US and Canada, and features a dual-filament design on a BAY15d bayonet base, rated at 12V with a 26.9W high filament and an 8W low filament.
The BAY15d bayonet base of the 2357 uses two offset pins to ensure correct polarity orientation during installation, a feature that distinguishes it from single-filament bayonet types.
The 2357 is noted as a brighter variant of the 1157 bulb. While the two share the same BAY15d base and are physically interchangeable in many sockets, the 2357 draws more wattage on its high filament, producing greater output.
The rear side marker specification for the Kia Forte5 (2014-2018) carries a conditional note stating the 2357 applies specifically to vehicles equipped with halogen capsule headlamps, indicating that headlamp type is a relevant fitment variable for this position.