Mazda Navajo Back Up Light Bulb Size

The Mazda Navajo back up light requires bulb size 3156 or 2456 or 2356 depending on the specific version. Data for the bulb sizes covers the range from 1991 to 1994.

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
1994	2456
1993	2356
1992	2456
1991	3156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.	2456
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V.	2356
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.	3156

Other Locations

Additional Notes

The Mazda Navajo backup light bulb specifications cover the 1991-1994 model years, with three distinct bulb types used across that range: the 2456, 2356, and 3156.
All three bulb types conform to ANSI standards recognized in both the United States and Canada, and all operate on a 12-volt electrical system.
The 3156 bulb, fitted to the 1991 Navajo, is a single-filament wedge-type unit in a T25 form factor rated at 27 watts.
The 2356 bulb, used in the 1993 model year, is a dual-filament type with a BAY15d bayonet base. Its dual-filament design distinguishes it from the other two bulb types in this specification set.
The 2456 bulb is a festoon-type unit designated for specialty applications, and it appears in both the 1992 and 1994 model years.
The BAY15d bayonet base of the 2356 is not shared by the 2456 or 3156, which means the 1993 fitment is not interchangeable with any other year in this specification set.
The festoon form factor of the 2456 differs structurally from both the wedge base of the 3156 and the bayonet base of the 2356, making cross-year substitution between these types incompatible without modification.
Although the 2456 is used in both 1992 and 1994, the 1991 and 1993 model years each require a unique bulb type, meaning no single bulb serves all four years.