Mazda B3000 Back Up Light Bulb Size

The Mazda B3000 back up light utilizes bulb sizes 2355, 2456, 2356, and 3156 across various production versions. Available data for the specified components covers the range from 1994 to 2007.

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
2006-2007	2355
1999-2005	2456
1998	2356
1996	2456
1995	3156
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 B3000 back up light specifications cover model years 1994-2007, with three distinct bulb types appearing across that span: the 2456, 2356, 2355, and 3156.
The 2456 is the most frequently specified bulb across the Mazda B3000 lineup, covering model years 1999-2004 as well as 1996, making it the dominant fitment across this vehicle's history.
The 2456 is a festoon-style bulb rated at 12V and is classified as a specialty application type under the ANSI standard used in the US and Canada.
The 2355 and 2356 are both dual-filament bulbs sharing the BAY15d bayonet base and operating at 12V. Despite their similar construction, they are distinct ANSI part numbers and are not listed as interchangeable within these specifications.
The 2355 is specified for the 2006-2007 Mazda B3000, while the 2356 is specified for the 1994 and 1998 model years, meaning these physically similar bulbs appear at different points in the vehicle's production run.
The BAY15d bayonet base found on both the 2355 and 2356 is a two-pin offset base, where the dual filaments serve separate lighting functions. Using a single-filament replacement in such a socket would result in incomplete circuit function.
The 3156 is specified exclusively for the 1995 Mazda B3000. It is a single-filament wedge bulb of the T25 type, rated at 12V and 27W, which differs structurally from all other bulb types listed in these specifications.
The wedge base of the 3156 and the BAY15d bayonet base of the 2355 and 2356 are physically incompatible socket types, meaning bulbs from those groups cannot be substituted for one another regardless of voltage rating.
The festoon form factor of the 2456 also represents a physically distinct mounting style from both the wedge and bayonet base types present in these specifications, requiring a dedicated festoon socket.
All four bulb types in these specifications conform to ANSI standards applicable in the US and Canada and operate on a 12V electrical system, consistent with standard automotive electrical architecture.