The Dodge W250 front turn signal uses a 2057NA, 2057, or 1157 bulb size, while the rear turn signal requires a 2057 or 1157 bulb size. The replacement chart covers 1981 through 1993 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 three bulb types specified for the Dodge W250 turn signals, the 1157, 2057, and 2057NA, all share the BAY15d bayonet base, which is a dual-contact offset-pin base designed to prevent incorrect installation orientation.
All three bulb types operate on a 12-volt electrical system and carry dual filaments, meaning each bulb serves both the turn signal and a secondary lower-intensity function within the same housing.
The 1157 operates at 21W on its high filament and 5W on its low filament, while both the 2057 and 2057NA operate at 26.9W and 8W respectively, making the latter two noticeably brighter across both filaments.
The 2057NA carries natural amber glass, which produces the amber turn signal color through the bulb itself rather than relying solely on a colored lens to filter a clear light source.
The front turn signal on the Dodge W250 used the 1157 from 1981-1990, then shifted to the 2057NA for 1991, reverted to the standard 2057 for 1992, and returned to the 2057NA for 1993.
The rear turn signal specification shows less consistency across the same production span, with the 1157 and 2057 alternating across multiple model years rather than following a single transition point.
Because the 1157 and 2057 share the BAY15d base, physical fitment is identical, but the wattage difference between the two types means they are not electrically interchangeable without potential effects on turn signal flash rate or circuit load.
The 1992 front turn signal is the only model year in the front position to specify the 2057 without the NA amber glass designation, while the surrounding years specify the 2057NA, indicating a glass-type variation within an otherwise identical electrical specification.
The rear turn signal for 1989 specifies the 2057, while the immediately adjacent years of 1988 and 1990 specify the 1157, representing a single-year deviation within an otherwise consistent block of 1157 usage in that position.
The 1157 is the most frequently specified bulb across both turn signal positions on the W250, appearing in the majority of model years covered by these specifications.