Isuzu Hombre Back Up Light Bulb Size

The Isuzu Hombre back up light bulb size specifications include 2456, 2356, and 3156 bulb options for this vehicle model. The replacement chart covers 1996 to 2000 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 Size
2000	2456
1999	2356
1998	3156
1997	2356
1996	2456

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 Isuzu Hombre backup light bulb specifications cover the 1996-2000 model years, with three distinct bulb types used across that span: the 2456, 2356, and 3156.
The 3156 is a single-filament wedge bulb in the T25 form factor, rated at 12V and 27W, and it appears in the 1998 Hombre as the specified backup light bulb.
The 2356 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V, and it is the specified fitment for the 1997 and 1999 Hombre.
The 2456 is a festoon-style bulb rated at 12V and designated for specialty applications under the ANSI standard, and it is the specified fitment for the 1996 and 2000 Hombre.
All three bulb types conform to ANSI standards recognized in both the United States and Canada.
The 2356 and 3156 are not interchangeable despite both operating at 12V. The 2356 uses a BAY15d bayonet base, while the 3156 uses a wedge base, making the two physically incompatible.
The 2456 festoon bulb differs in form factor from both the 2356 and 3156, as festoon bulbs are held in place by contact at each end rather than by a base socket, which further limits cross-compatibility.
The dual-filament design of the 2356 is a notable distinction from the single-filament 3156, as dual-filament bulbs support two independent brightness levels within one housing.