The Lexus ES250 brake light requires a 1157 bulb size for the rear lighting system. Data for the specific component covers the range from 1990 to 1991.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus ES250 uses the 1157 bulb for its brake lights across the 1990-1991 model years.
The 1157 is a dual-filament bulb, meaning it serves two lighting functions within a single unit, typically combining stop and tail light operation through separate filaments rated at 21W and 5W respectively.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect installation by ensuring only one rotational orientation fits the socket.
The 1157 operates at 12V, consistent with standard automotive electrical systems.
The center high mount stop light on the ES250 uses the 921 bulb for the 1990-1991 model years, a different bulb type from the main brake lights.
The 921 is a single-filament wedge bulb of the T15 form factor, rated at 12V and 16W.
A wedge base bulb relies on tension from its base contacts rather than a bayonet locking mechanism, making it physically incompatible with the BAY15d socket used by the 1157.
Because the main brake lights and the center high mount stop light use different bulb types, the 1157 and 921 are not interchangeable on the ES250.
Both the 1157 and 921 conform to ANSI standards applicable in the United States and Canada.