Kia Sephia front turn signal bulbs use 2357NA and 1157 sizes, while rear turn signal bulbs use 1156NA and 1156 sizes. The replacement chart covers 1994 to 2001 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Kia Sephia front turn signal uses the 1157 bulb for model years 1994-1997 and transitions to the 2357NA bulb for model years 1998-2001.
The 1157 and 2357NA are both dual-filament bulbs sharing the BAY15d bayonet base, which means the socket is physically compatible across these two front turn signal applications on the Sephia.
Although the 1157 and 2357NA share the same BAY15d base, their wattage ratings differ. The 1157 operates at 21W/5W while the 2357NA operates at 26.9W/8W, making them electrically distinct.
The 2357NA designation includes a natural amber glass coating, which produces the amber turn signal color without relying on a tinted lens. The 1157, by contrast, uses clear glass and depends on the vehicle's lens for color output.
The Kia Sephia rear turn signal uses the 1156 bulb for model years 1994-1997 and transitions to the 1156NA bulb for model years 1998-2001.
The 1156 and 1156NA share the same BA15s single-contact bayonet base and identical 12V, 21W electrical ratings, differing only in that the 1156NA carries a natural amber glass coating.
Because the 1156 and 1156NA are electrically and physically identical aside from glass color, the socket fitment is consistent across all Sephia rear turn signal model years covered in these specifications.
All four bulb types listed in these specifications conform to ANSI standards applicable to the United States and Canada.
The front and rear turn signal positions use different base types. The front position uses the BAY15d dual-contact base, while the rear position uses the BA15s single-contact base, and these two base types are not interchangeable.
The shift from clear-glass to natural amber bulbs in both the front and rear positions occurs at the same point in the Sephia model range, with 1998-2001 models specified for NA-suffix bulbs in both locations.