The Ford Escort brake light uses 3157, 2458, 1157, 2357, and 1034 bulb sizes depending on the specific production version. Available data covers a range from 1956 through 2003.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Escort brake light circuit relies on the 3157 bulb across the widest span of model years in these specifications, covering 1989-1990, 1993, and 1997-2003. It is a dual-filament T25 wedge bulb rated at 12V with a 27W high-filament and 7W low-filament output, conforming to the ANSI standard used in the United States and Canada.
The 1157 bulb is specified for the Ford Escort brake light in 1981-1985 and 1991-1992. It uses a BAY15d bayonet base and operates at 12V with a 21W high filament and 5W low filament. The BAY15d base features two offset pins, which physically prevents incorrect single-filament bulbs from being seated in the socket.
The 2357 bulb is specified for 1986-1988 model years. It shares the BAY15d bayonet base with the 1157 and carries the same 12V rating, but its filaments draw 26.9W and 8W respectively, making it a higher-output variant. Because both bulbs use the same base, physical fitment is possible between them, though wattage differences mean they are not electrically equivalent replacements.
The 1034 bulb is specified for the 1956-1957 model years. It also uses the BAY15d bayonet base at 12V with a 21W/5W dual-filament configuration, classifying it as a variant of the 1157 family. The shared base geometry means a 1034 socket is physically compatible with 1157 and 2357 bulbs, though output characteristics differ.
For the Center High Mount Stop Light, the 921 bulb is specified across 1986-1993 and 1997-2003. It is a single-filament T15 wedge bulb rated at 12V and 16W. The T15 wedge base is a push-in type with no locking pins, making installation orientation straightforward.
The 1988 Ford Escort Center High Mount Stop Light is specified with the 912 bulb rather than the 921 used in surrounding years. The 912 is also a T15 wedge bulb at 12V but is rated at 12W, which is lower than the 921's 16W. Both share the same T15 wedge base, so the sockets are physically interchangeable, but the wattage difference is a relevant electrical consideration.
All bulb types listed in these specifications conform to ANSI standards applicable in the United States and Canada. ANSI bulb numbers define a standardized set of electrical and physical characteristics, meaning bulbs from different manufacturers carrying the same number are expected to meet the same specifications.
The 3157 and 1157 are both dual-filament bulbs used in brake light applications, but they use different base types. The 3157 uses a T25 wedge base while the 1157 uses a BAY15d bayonet base. These two base types are not interchangeable, and a socket designed for one will not accept the other without modification.