The Dodge B3500 front turn signal uses bulb sizes 3457, 3157NA, or 2057, while the rear turn signal requires a 3157 size bulb. The replacement chart covers vehicle production years spanning 1995 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The rear turn signal position on the Dodge B3500 uses the 3157 bulb across all four model years covered in the specifications, from 1995-1998.
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 for the US and Canada.
The front turn signal position shows variation across model years, with three different bulb sizes specified: the 2057 for 1995-1996, the 3157NA for 1997, and the 3457 for 1998.
The 3457 front turn signal bulb for the 1998 Dodge B3500 shares the same T25 wedge form factor and 12V/27W/7W dual-filament ratings as the 3157 used at the rear, though the two carry different ANSI designations and are not the same part.
The 1997 front turn signal uses the 3157NA, which is a natural amber glass variant of the T25 wedge family. Its amber tint is built into the glass envelope rather than applied through a lens or coating, and it carries the same 12V/27W/7W electrical ratings as the 3457 and 3157.
The 2057 specified for the 1995-1996 front turn signal position differs from the T25 wedge family in its base type. It uses a BAY15d bayonet base rather than a wedge base, making it physically incompatible with sockets designed for T25 wedge bulbs.
The 2057 is described as a brighter variant of the 1157, operating at 12V with a 26.9W high filament and 8W low filament. Its wattage ratings are close to but not identical to those of the T25 wedge bulbs used in other positions.
Because the 1997 front position calls for the 3157NA and the 1998 front position calls for the 3457, substituting one for the other across those model years would involve replacing an amber-glass bulb with a clear one, or vice versa, which affects the color output at that position.