The Toyota T100 brake light utilizes a 1157 bulb size for illumination across all recorded vehicle configurations. Data for the specified lighting component covers the period from 1993 through 1998.
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 type across the Toyota T100 brake lighting system, appearing in both the standard brake and outer brake positions across the 1993-1998 model range.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W/5W output. The dual-filament design allows a single bulb to serve both the brake and tail light functions at different wattages.
The BAY15d bayonet base features offset pins, which physically prevent incorrect installation of a single-filament bulb in a socket designed for dual-filament operation. Substituting a single-filament equivalent would result in loss of either the brake or tail light function.
The center high mount stop light on the Toyota T100 uses the 168 bulb across the full 1993-1998 model range, a specification distinct from the outer brake positions.
The 168 is a miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W. It is a single-filament type, consistent with its dedicated stop light role rather than a combined brake and tail function.
The T10 wedge base of the 168 bulb is not interchangeable with the BAY15d bayonet base of the 1157. The two bulb types serve different sockets and cannot be substituted for one another.
Both the 1157 and 168 are ANSI-standardized bulbs for the US and Canadian markets, meaning the numeric designations correspond to fixed electrical and physical specifications rather than proprietary ratings.
The outer brake position on the T100 is specified for the 1995-1998 model years, using the 1157 bulb, which is the same type as the standard brake position for those years.