Kia Cadenza Back Up Light Bulb Size

The Kia Cadenza back up light requires a bulb size of 921 for the rear lighting assembly. Available data for the specified component covers the range from 2017 to 2019.

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
2017-2019	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 for the Kia Cadenza across the 2017-2019 model years.
The 921 is an ANSI-standardized bulb type, meaning its electrical and physical characteristics conform to a defined North American specification used in both the United States and Canada.
The 921 uses a wedge-style base, classified under the T15 designation. A wedge base relies on the bulb's glass envelope and wire leads to hold it in the socket, with no separate metal base or pins.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems.
The T15 wedge form factor is shared by several bulb numbers in the same family, so substitution with a visually similar wedge bulb of a different wattage or voltage rating would fall outside the stated specification for the Cadenza's back up light.