The Dodge Dynasty front turn signal requires a 3157NA, 3157, or 3057NA bulb size, while the rear turn signal uses a 3157 or 3057 bulb size. The replacement chart covers 1988 to 1993 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.
The Dodge Dynasty uses two bulb families across its front and rear turn signal positions: the 3157 series and the 3057 series, both of which are dual-filament T25 wedge bulbs rated at 12V with a 27W high filament and a 7W low filament.
The T25 designation refers to the wedge base form factor, which is a push-in style base without a separate metal cap, common in automotive signal and tail light applications.
The "NA" suffix on the 3157NA and 3057NA designates a natural amber glass envelope, meaning the bulb itself produces amber-colored light without relying on a colored lens to achieve the required turn signal hue.
The front turn signal on the Dodge Dynasty uses the NA-suffix variants for 1988-1991 (3057NA) and 1993 (3157NA), while the rear turn signal uses the clear-glass equivalents, the 3057 for 1988-1991 and the 3157 for 1992-1993.
The 3057 and 3157 share identical voltage and wattage ratings, but they differ in base configuration. The 3057 uses a different pin spacing than the 3157, making the two series non-interchangeable despite their similar appearance and electrical output.
The 1992 front turn signal is the only position in the entire Dynasty specification that uses the 3157 without the NA suffix, while all other front positions use an NA variant.
All four bulb types listed are ANSI-standardized for the US and Canadian markets, meaning they conform to a defined set of electrical and physical tolerances established by the American National Standards Institute.
The dual-filament design of all listed bulbs allows a single bulb to serve two lighting functions simultaneously, with the higher 27W filament typically assigned to the turn signal or brake function and the lower 7W filament assigned to a running light function.