Kia Forte5 front turn signal bulb size 2357NA and rear turn signal bulb size 1156NA are specified in this replacement chart. The chart covers vehicle production years 2014 through 2018.
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 turn signal positions: the 2357NA for the front and the 1156NA for the rear, across the 2014-2018 model years.
The 2357NA is a dual-filament bulb, meaning it carries two separate filaments within a single housing, allowing it to serve more than one lighting function simultaneously.
The 1156NA is a single-filament bulb, designed to perform one lighting function, which aligns with its dedicated use in the rear turn signal position.
Both the 2357NA and 1156NA are built to ANSI standards recognized in the United States and Canada, placing them within a standardized North American specification framework.
The natural amber glass of both bulb types produces a colored output directly from the glass itself, rather than relying on an amber-tinted lens housing to achieve the required turn signal color.
The 2357NA uses a BAY15d bayonet base, which is an offset dual-contact base. The 1156NA uses a BA15s bayonet base, a single-contact version. These two base types are not interchangeable with each other.
The 2357NA operates at 26.9W on its primary filament and 8W on its secondary filament, both at 12V. The 1156NA operates at 21W at 12V.
Because the front position requires a dual-filament 2357NA and the rear requires a single-filament 1156NA, substituting one for the other is not supported by the base configurations alone.