Ford E-350 Super Duty Back Up Light Bulb Size

The Ford E-350 Super Duty back up light utilizes 3156, 2456, and 2356 bulb sizes for various configurations. Available data covers a range from 1999 through 2023 for the specified vehicle components.

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
2021-2023	3156
2013-2019	3156
2012	2456
2011	2356
2010	2456
2007-2009	2356
2005-2006	2456
2004	3156
2001-2003	2456
2000	3156
1999	2456

Bulb Specifications

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

Other Locations

Additional Notes

The Ford E-350 Super Duty uses three distinct back up light bulb types across its model years: the 3156, 2456, and 2356.
The 3156 is the most frequently specified bulb in these records, appearing across 2013-2023 as well as in 2004 and 2000.
The 3156 is a single-filament wedge bulb with a T25 body, rated at 12V and 27W, and conforms to ANSI standards for the US and Canadian markets.
The 2456 is a festoon-style bulb rated at 12V, also conforming to ANSI standards, and is designated for specialty applications.
The 2356 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V, and likewise meets ANSI standards for the US and Canadian markets.
The Ford E-350 Super Duty uses the 2356 in 2007-2009 and 2011, while the 2456 appears in 2001-2003, 2005-2006, 2010, and 2012.
The single-filament design of the 3156 differs fundamentally from the dual-filament 2356, meaning these two bulbs are not interchangeable despite sharing a similar voltage rating.
The festoon form factor of the 2456 also differs physically from both the T25 wedge base of the 3156 and the BAY15d bayonet base of the 2356, making cross-substitution between these types incompatible.
The back up light bulb specification for the Ford E-350 Super Duty changed multiple times between 1999 and 2013, with no single bulb type used in an uninterrupted consecutive sequence across that entire span.
From 2013 onward through 2023, the specification stabilized on the 3156, representing the longest uninterrupted run of a single bulb type in these records.