Kia Rio5 Back Up Light Bulb Size

The Kia Rio5 back up light requires a bulb size of 921 for the specific lighting component located at the rear of the vehicle. Available data for the bulb specifications covers the range from 2006 to 2011.

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
2006-2011	921

Bulb Specifications

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

Other Locations

Additional Notes

The 921 is the sole back up light bulb size listed for the Kia Rio5 across all available model years in these specifications, covering 2006-2011.
The 921 bulb follows the ANSI standard, which is the recognized classification system for automotive bulbs in the United States and Canada.
It uses a wedge-style base, designated T15, meaning the bulb is held in its socket by friction rather than by a bayonet or screw mechanism.
The T15 designation refers to the bulb's tubular shape, with the numerical portion indicating a width of 15 eighths of an inch across the widest point of the glass envelope.
The 921 operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles.
Its rated wattage is 16W, which places it in the mid-range for incandescent wedge bulbs and reflects a balance between output brightness and power draw.
The 921 and 194 are both T-series wedge bulbs, but they are not interchangeable; the 921 draws significantly more current, and substituting a lower-wattage wedge type in a back up light application would result in reduced output.