Chrysler 300M Back Up Light Bulb Size

The Chrysler 300M back up light utilizes 3157 and 2458 bulb sizes for the lighting system. Data for the specific bulbs covers the range from 1999 to 2001.

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
1999-2001	3157

Bulb Specifications

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

Other Locations

Additional Notes

The 3157 is the specified back up light bulb size for the Chrysler 300M across the 1999-2001 model years.
The 3157 bulb follows the ANSI standard, meaning it conforms to a defined North American specification recognized in both the United States and Canada.
It is a dual-filament bulb, which means it contains two separate filaments within a single housing, each operating at a different wattage: 27W for the higher-intensity filament and 7W for the lower-intensity filament.
The bulb operates on a 12-volt electrical system, consistent with standard automotive voltage.
The 3157 uses a T25 wedge base, a designation that refers to the shape and size of the base used to seat the bulb within its socket.
Because the 3157 is a dual-filament type, substituting it with a single-filament bulb of a similar base style would result in incomplete circuit function for one of the two filaments.