The Dodge Mirada front turn signal requires a 2057NA, 2057, or 1157NA bulb size, while the rear turn signal uses a 1157 bulb size. The replacement chart covers 1980 to 1983 model 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.
All four bulb types specified for the Dodge Mirada's turn signals, the 2057NA, 2057, 1157NA, and 1157, share the BAY15d bayonet base, meaning the physical mounting interface is identical across all positions and model years.
The BAY15d base is a dual-contact bayonet fitting, which corresponds to the dual-filament nature of all four bulb types. One filament serves the lower-intensity running or parking function, while the other serves the higher-intensity turn signal or brake function.
The 2057 and 2057NA operate at 26.9W on the high filament, compared to 21W for the 1157 and 1157NA. Both pairs share the same 8W and 5W low-filament ratings respectively, making the 2057 series the brighter variant in the high-intensity circuit.
The front turn signal of the Dodge Mirada used the 1157NA in 1980, then shifted to the 2057 in 1981, and to the 2057NA in 1982-1983. These are not interchangeable without accounting for the wattage difference between the 1157 and 2057 series.
The rear turn signal of the Dodge Mirada used the 1157 consistently across all four model years, 1980-1983, indicating no change in the rear lighting specification throughout the vehicle's production run.
The "NA" designation in bulb types 2057NA and 1157NA refers to natural amber glass, meaning the amber color is produced by the glass envelope itself rather than by an external lens or coating. The non-NA variants produce white light and rely on a colored lens for amber output.
Because the 2057 and 1157 series both use the BAY15d base and operate at 12V, physical installation is possible across types, but the wattage difference between the two series means the electrical load on the turn signal circuit differs depending on which type is installed.
The front and rear turn signals of the Mirada used different bulb types in every model year, with the rear consistently drawing less wattage on the high filament than the front from 1981 onward.