Ford Freestar Back Up Light Bulb Size

The Ford Freestar back up light requires a unique bulb size of 2356, 2456, or 3156 depending on the specific version of the vehicle. Data for the bulb sizes covers the range of 2004 through 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
2007	2356
2006	2456
2005	3156
2004	2456

Bulb Specifications

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

Other Locations

Additional Notes

The Ford Freestar uses three distinct back up light bulb types across its 2004-2007 model years: the 2356, 2456, and 3156.
All three bulb types conform to ANSI standards recognized in both the United States and Canada, and all operate at 12 volts.
The 2456 bulb is a festoon-style unit rated for specialty applications. The Ford Freestar (2004 and 2006) uses this bulb for its back up light.
The 3156 is a single-filament wedge bulb in a T25 form factor, rated at 27 watts. The 2005 Freestar uses this type.
The 2356 is a dual-filament bulb with a BAY15d bayonet base. The 2007 Freestar uses this type for the back up light position.
The BAY15d bayonet base on the 2356 is a two-pin offset base, which is physically distinct from the wedge base of the 3156 and the festoon format of the 2456. These three base types are not interchangeable with one another.
The dual-filament design of the 2356 differs functionally from the single-filament 3156, meaning substitution between these two types is not supported even where voltage ratings match.
The 2456 festoon bulb requires a holder designed to accept a cylindrical, pin-ended lamp, which is a different mounting arrangement than either the bayonet or wedge formats used in other Freestar model years.