The Dodge 600 front turn signal requires a 2057 or 2057NA bulb size, while the rear turn signal uses a 2057 bulb size. The replacement chart covers 1983 through 1988 vehicle 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 2057 and 2057NA are the two bulb types specified for the Dodge 600's turn signal positions. Both share the same dual-filament design, BAY15d bayonet base, 12V operating voltage, and 26.9W/8W wattage rating, making them functionally identical in electrical terms.
The BAY15d bayonet base is an offset-pin base, meaning the two pins are positioned at different heights around the base. This prevents incorrect insertion and ensures the high- and low-wattage filaments connect to the correct circuits.
Both bulb types are rated at 26.9W for the high-intensity filament and 8W for the low-intensity filament. In a turn signal application, the higher-wattage filament is the one activated during signaling.
The 2057 and 2057NA are described as brighter variants of the 1157. Despite this difference in output, the two types share the same base and wattage, so the 1157 is a lower-output alternative that physically fits the same socket.
The sole distinction between the 2057 and the 2057NA is the natural amber glass envelope on the 2057NA. This amber coating produces a colored signal output without relying on a colored lens, which is the function it serves in the front turn signal positions of the Dodge 600 (1983-1984).
For the Dodge 600, the front turn signal uses the 2057NA for 1983-1984 and transitions to the standard clear-glass 2057 for 1986-1988. These are not interchangeable without accounting for whether the housing lens provides the amber color independently.
The rear turn signal on the Dodge 600 uses the standard 2057 across all listed years, 1983-1988, with no variation in bulb type across that span.
No front turn signal bulb is listed for 1985, while the rear turn signal carries a 2057 entry for that year. This reflects the data as provided in the specifications.
Both the 2057 and 2057NA conform to ANSI standards recognized in the United States and Canada, indicating standardized performance and dimensional tolerances across manufacturers producing these bulb types.
Because the 2057NA and 2057 share the same base and socket configuration, physical installation is identical for both. The functional difference is limited to the color output produced by the amber glass on the 2057NA variant.