Dodge Durango Back Up Light Bulb Size

The Dodge Durango back up light utilizes bulb sizes 921 and 3057 for the various lighting components located at the rear of the vehicle. Provided information covers the span from 1998 through 2023 for the specified automotive lighting application.

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
2011-2023	921
1998-2009	3057

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3057

Other Locations

Additional Notes

The Dodge Durango back up light uses one of two bulb types across its model years: the 921 for 2011-2023 and the 3057 for 1998-2009.
The 921 is a single-filament wedge bulb rated at 12V and 16W, conforming to the T15 form factor under the ANSI standard recognized in both the US and Canada.
The 3057 is a dual-filament wedge bulb rated at 12V with a 27W main filament and a 7W secondary filament, conforming to the T25 form factor under the same ANSI standard.
The dual-filament design of the 3057 means it carries two independent filaments within a single bulb, each serving a different wattage output, which is a characteristic not shared by the single-filament 921.
The T15 and T25 designations refer to the tubular shape of the bulb, with the numeric portion indicating the width in eighths of an inch, making the T25 physically larger than the T15.
Because the 921 and 3057 differ in both physical size and filament configuration, the two types are not interchangeable with each other.
The wedge base design on both bulb types means the bulb is held in its socket by the tension of the base itself rather than by a separate locking mechanism such as a bayonet or screw base.
The 921 bulb specification for the Dodge Durango remains consistent across the entire 2011-2023 range, with no variation by trim or sub-model noted in the specifications.
The 3057 bulb specification similarly remains consistent across the 1998-2009 range of the Dodge Durango.