The Dodge Colt brake light utilizes 1157 and 2057 bulb sizes according to the provided technical specifications for the vehicle lighting system. Available information covers the span from 1971 through 1994 for the listed automotive components.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1157 bulb is the most frequently specified brake bulb for the Dodge Colt, covering model years 1971-1985 with the exception of the 1992 two-headlamp configuration.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments drawing 21W and 5W respectively, where the higher wattage filament serves the brake and tail stop function.
The 2057 shares the same BAY15d bayonet base as the 1157 and is also a dual-filament bulb, but operates at 26.9W and 8W, making its high-intensity filament noticeably brighter than that of the 1157.
Both the 1157 and 2057 use the BAY15d bayonet base, which features two offset pins to prevent incorrect installation of a single-filament bulb in a dual-filament socket.
The 1993-1994 Dodge Colt uses the 2057 as the standard brake bulb, representing a departure from the 1157 specification used in earlier model years.
The 1992 Dodge Colt has two distinct brake bulb specifications depending on headlamp configuration: the 1157 applies to the two-headlamp variant, while the 2057 applies to the four-headlamp variant.
Although the 2057 and 1157 share the same BAY15d base and are physically interchangeable in many sockets, substituting one for the other results in a difference in brake light output intensity due to the wattage gap between the two types.
The 921 is a single-filament wedge-type bulb in a T15 form factor, rated at 12V and 16W, and is specified exclusively for the Center High Mount Stop Light on the 1993-1994 Dodge Colt.
The 921 wedge base is not compatible with the BAY15d bayonet sockets used by the 1157 and 2057, meaning the Center High Mount Stop Light housing on the 1993-1994 Colt requires a separate socket type from the standard brake light housings.
All three bulb types listed in these specifications, the 1157, 2057, and 921, conform to ANSI standards recognized in both the United States and Canada.