Mazda CX-5 Back Up Light Bulb Size

The Mazda CX-5 back up light uses a 921 bulb size for this component. The replacement chart covers 2013 to 2016 vehicle production years with corresponding bulb size data.

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 Type	Shop
2013-2016	921	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921	Check Price

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Additional Notes

The Mazda CX-5 (2013-2016) uses the 921 bulb size across all available model years for the back up light position.
The 921 is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope measuring 15 eighths of an inch in width.
Wedge bulbs use a plastic base with two wire contacts that pinch into the socket, eliminating the need for a separate metal base or bayonet pins.
The 921 operates at 12 volts and 16 watts, which is consistent with standard automotive low-voltage electrical systems.
The 921 bulb conforms to ANSI standards, meaning its physical and electrical characteristics are governed by a recognized North American specification body covering both the United States and Canada.
Because the same bulb size is shared across all four model years listed, a single 921 bulb is interchangeable among the 2013-2016 CX-5 back up light sockets without modification.