Ram C/V Back Up Light Bulb Size

The Ram C/V back up light utilizes bulb sizes 2458 and 3157 for illumination purposes. Data for the specified components covers the period from 2012 through 2015.

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
2012-2015	3157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

Other Locations

Additional Notes

The Ram C/V uses the 3157 bulb for the back up light across the 2012-2015 model years.
The 3157 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 3157 is a dual-filament bulb, housing two separate filaments within a single unit. The higher-output filament operates at 27W, while the lower-output filament operates at 7W.
The bulb operates on a 12V electrical system, which is consistent with standard automotive voltage.
The 3157 follows the T25 wedge form factor. The T25 designation refers to the bulb's body shape and base type, which uses a plastic wedge base rather than a metal bayonet or screw base.
Because the 3157 is a dual-filament type, substituting it with a single-filament equivalent such as the 3156 would result in the loss of one lighting function, making direct replacement with the correct dual-filament part necessary for proper operation.