The Acura Integra brake light utilizes 1157 and 2057 bulb sizes depending on the specific vehicle configuration and production requirements for the lighting system. Available information covers the span from 1986 through 1993 for the specified automotive components.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Acura Integra brake bulb specifications cover model years 1986-1993, with two distinct bulb types used across that span depending on the year.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments drawing 21W and 5W respectively. It serves the brake lights on the 1990-1993 Integra.
The 2057 is also a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments drawing 26.9W and 8W respectively. It serves the brake lights on the 1986-1989 Integra.
Although the 1157 and 2057 share the same BAY15d bayonet base, the 2057 operates at a higher wattage on both filaments, making the two bulbs non-identical in output despite their physical compatibility at the socket level.
The center high mount stop light on the 1990-1993 Integra uses the 921, a single-filament wedge-type bulb in a T15 form factor, rated at 12V and 16W.
The center high mount stop light on the 1986-1989 Integra uses the 1156, a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W.
The 921 and 1156 are not interchangeable. The 921 uses a wedge base while the 1156 uses a BA15s bayonet base, meaning the two bulbs require physically different sockets.
All four bulb types listed in these specifications, the 1157, 2057, 921, and 1156, conform to ANSI standards applicable in both the United States and Canada.
The brake light circuit on all listed Integra model years relies on dual-filament bulbs, which serve both the lower-intensity running light function and the higher-intensity brake light function within a single housing.
The center high mount stop light circuit across all listed years uses a single-filament bulb, as that position serves only the brake signal function and does not require a secondary running light filament.