Kia Forte Back Up Light Bulb Size

The Kia Forte back up light requires a 921 bulb size for proper installation and function within the rear lighting assembly. Available data covers the time range from 2010 through 2024 for the specified vehicle components.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2021-2024	921
2010-2018	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The 921 bulb is the specified back up light bulb size across all listed model years of the Kia Forte, spanning 2010-2018 and 2021-2024.
The 921 bulb follows the ANSI standard, which is the recognized specification system used in the United States and Canada for automotive lighting.
It is a wedge-type bulb, classified under the T15 designation. The T15 designation refers to the bulb's tubular shape, with the numeric portion indicating a width of 15 eighths of an inch across the widest point of the glass envelope.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems and typical for reverse lighting applications.
The wedge base design means the bulb is held in place by tension from the socket contacts rather than a bayonet or screw mechanism, making it a tool-free replacement in most housings.
Because the 921 is an ANSI-standardized bulb, it is produced by multiple manufacturers and is broadly interchangeable across that standard, provided the replacement unit matches the 12V, 16W electrical rating.