Mitsubishi Eclipse Back Up Light Bulb Size

The Mitsubishi Eclipse back up light utilizes 1156, 2356, 2456, 3156, and P21W bulb sizes depending on the specific production period. Available information covers a span from 1990 through 2012.

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
2011-2012	2456
2010	3156
2007-2009	2456
2006	2356
1990-2005	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.	2456
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.	3156
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V.	2356
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Mitsubishi Eclipse back up light specifications span the 1990-2012 model years, with four distinct bulb types used across that period: the 1156, 2356, 2456, and 3156.
The 1156 bulb is the most frequently specified type in these records, covering the Eclipse from 1990-2005. It is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W.
The BA15s bayonet base on the 1156 is a single-contact design, which is not interchangeable with the BAY15d dual-contact bayonet base found on the 2356 bulb used in the 2006 Eclipse.
The 2456 is classified as a festoon bulb intended for specialty applications and carries a 12V rating. It is specified for the 2007-2009 and 2011-2012 Eclipse model years.
A festoon bulb has a cylindrical shape with end-cap contacts rather than a base, making it physically distinct from the wedge and bayonet-base bulbs also present in these specifications.
The 3156 is a single-filament wedge bulb of the T25 type, rated at 12V and 27W. It is specified exclusively for the 2010 Mitsubishi Eclipse within these records.
The 2356 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V. Its dual-filament construction distinguishes it from the single-filament 1156, despite both using bayonet-style bases.
The 2006 Eclipse uses the 2356, while the 2007 Eclipse uses the 2456. These two bulb types differ in both base design and filament count, meaning they are not interchangeable with each other or with bulbs from adjacent model years.
All four bulb types in these specifications conform to ANSI standards applicable in the United States and Canada.
The 2010 Eclipse is the only model year in these specifications to use the 3156 wedge bulb, which at 27W carries a higher wattage rating than the 21W 1156 used across the majority of the model range.