Mazda 2 Back Up Light Bulb Size

The Mazda 2 back up light uses a 921 bulb size for the specified replacement component. The chart covers vehicle production years from 2011 to 2014 with corresponding bulb specifications.

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
2011-2014	921

Bulb Specifications

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

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Additional Notes

The Mazda 2 uses the 921 bulb size for the back up light across the 2011-2014 model years.
The 921 is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope size expressed in eighths of an inch.
Wedge bulbs do not use a separate metal base or pins. Instead, the glass envelope itself tapers at the bottom to form a friction fit within the socket.
The 921 operates at 12 volts and 16 watts, which is consistent with standard automotive low-voltage electrical systems.
The 921 carries ANSI standardization, meaning its physical and electrical specifications are governed by a recognized industry standard applicable in the United States and Canada.
Because the 921 is an ANSI-standardized part, it is produced by multiple manufacturers and is widely available as a direct replacement without socket modification.
The T15 wedge form factor is shared by several bulb numbers in the ANSI series, so substitution with a visually similar wedge bulb of a different number may result in a wattage or voltage mismatch.