The Toyota T100 front side marker uses a 168 bulb size while the rear side marker requires a 1157 bulb size. The replacement chart covers 1993 to 1998 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota T100 uses the 168 bulb for the front side marker position across all model years from 1993-1998. This bulb follows the ANSI standard recognized in both the US and Canada.
The 168 is a miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W. The wedge base design means it is held in place by the socket itself rather than by a separate locking mechanism.
The rear side marker position on the T100 for 1993-1998 uses the 1157 bulb, also an ANSI-standardized type for the US and Canadian markets.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W high filament and a 5W low filament. The dual-filament design allows a single bulb to serve two brightness levels within one housing.
The front and rear side marker positions on the T100 use bulbs from different base families. The 168 uses a wedge base while the 1157 uses a BAY15d bayonet base, making the two types physically non-interchangeable with each other.
The wattage difference between the front and rear side marker bulbs is substantial. The 1157's high filament draws 21W compared to the 168's 4.9W, reflecting the greater light output typically required at the rear position where the bulb may also serve a secondary signaling function.