The Dodge B2500 front side marker bulb uses 3457 or 194 size, while the rear side marker bulb uses 168 size. The replacement chart covers 1995 to 1998 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge B2500 uses three distinct bulb types across its front and rear side marker positions: the 3457, 194, and 168, all of which conform to ANSI standards recognized in both the United States and Canada.
The 194 and 168 are both miniature wedge bulbs of the T10 form factor operating at 12V, though they differ in wattage. The 194 draws 3.78W, while the 168 draws 4.9W. Despite sharing the same physical format, these two bulbs are not rated identically and are not interchangeable without accounting for that wattage difference.
The 3457 is a dual-filament wedge bulb of the T25 form factor, rated at 12V with a 27W/7W output. Its dual-filament design means it supports two separate brightness levels within a single bulb, a characteristic absent from the single-filament 194 and 168 types.
The front side marker position on the Dodge B2500 shifted from the 194 bulb in 1995-1997 to the 3457 bulb in 1998. These two bulbs differ in both physical size and filament configuration, making them incompatible with each other's sockets.
The rear side marker position on the Dodge B2500 uses the 168 bulb consistently across all four model years covered, spanning 1995-1998.
The T25 form factor of the 3457 is physically larger than the T10 form factor shared by the 194 and 168. A T10 bulb cannot serve as a substitute in a T25 socket, and vice versa.
The 1998 front side marker application is the only position in these specifications that calls for a dual-filament bulb. All other positions across all listed years use single-filament bulbs.