Mazda B4000 Back Up Light Bulb Size

The Mazda B4000 back up light utilizes bulb sizes 2355, 2356, 2456, and 3156 across various production versions. Available specifications for the lighting components span a range from 1994 through 2009.

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
2006-2009	2355
2005	2456
2004	2356
2003	3156
2000-2002	2456
1999	2356
1997-1998	3156
1996	2356
1995	2456
1994	2356

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V.	2355
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 B4000 back up light specifications span the 1994-2009 model years and reference four distinct bulb types: 2355, 2456, 2356, and 3156.
The 2355 bulb is a dual-filament type with a BAY15d bayonet base, rated at 12V, and is the specified back up light bulb for the 2006-2009 model years.
The 2356 bulb shares the same BAY15d bayonet base and dual-filament construction as the 2355, also operating at 12V, and is specified for the 1994, 1996, 1999, and 2004 model years.
Because the 2355 and 2356 share the same base type and filament configuration, their physical mounting interface is identical, though they remain distinct ANSI part numbers and are not confirmed interchangeable by these specifications.
The 3156 is a single-filament wedge bulb of the T25 form factor, rated at 12V and 27W, and is specified for the Mazda B4000 in the 1997, 1998, and 2003 model years.
The 2456 is a festoon-style bulb rated at 12V and is designated for specialty applications, appearing in the 1995, 2000, 2001, 2002, and 2005 model years.
The festoon form factor of the 2456 differs structurally from both the BAY15d bayonet base of the 2355 and 2356 and the wedge base of the 3156, making cross-substitution between these types physically incompatible.
All four bulb types referenced in these specifications conform to ANSI standards applicable in the United States and Canada, and all operate on a 12V electrical system.
The back up light bulb specification for the Mazda B4000 changed multiple times across the 1994-2009 production span, with no single bulb type used exclusively throughout the entire range.
The 3156 is the only bulb in these specifications with a published wattage of 27W, while wattage values for the 2355, 2456, and 2356 are not stated in the provided data.