The Dodge B2500 front turn signal uses 3457, 2057, or 3157NA bulb sizes, while the rear turn signal requires a 3157 bulb size. The replacement chart covers 1995 through 1998 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge B2500 rear turn signal position uses the 3157 bulb across all four model years covered in the specifications, from 1995-1998, making it the most consistent fitment in this dataset.
The 3157 is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and 7W low filament, conforming to ANSI standards recognized in both the United States and Canada.
The 3157NA, fitted to the 1995 Dodge B2500 front turn signal position, shares the same T25 wedge base and identical 12V, 27W/7W electrical ratings as the standard 3157, with the sole distinction being its natural amber glass envelope.
Because the 3157NA and 3157 share the same base type and wattage ratings, the amber coloring on the 3157NA is built into the glass itself rather than achieved through a lens or coating, which is a relevant fitment consideration when substituting one for the other.
The 1998 Dodge B2500 front turn signal uses the 3457, a dual-filament T25 wedge bulb rated at 12V, 27W/7W, which is electrically and physically similar to the 3157 but is not the same part number and should not be treated as a direct interchange without verification.
The 1996-1997 front turn signal position on the Dodge B2500 uses the 2057, a dual-filament bulb with a BAY15d bayonet base rated at 12V, 26.9W/8W, which is a different base type from the T25 wedge used in the 3157, 3457, and 3157NA.
The BAY15d bayonet base of the 2057 is physically incompatible with the T25 wedge socket used by the 3157-series bulbs, meaning the front and rear turn signal sockets on the 1996-1997 B2500 are not interchangeable with each other.
The 2057 is described as a brighter variant of the 1157, sharing the same BAY15d base, which means an 1157 may fit the socket but will produce lower light output than the specified 2057.
All four bulb types listed in the specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the fitment range.
The front turn signal position on the Dodge B2500 uses three different bulb types across the 1995-1998 model years, while the rear position remains unchanged, indicating that front socket or housing changes occurred during this production period.