The Mitsubishi Expo brake light utilizes bulb size 3496 and bulb size 2057 for the lighting system. Data for the specified components covers the period from 1992 through 1995.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mitsubishi Expo brake light specifications cover the 1992-1995 model years, with two distinct positions addressed: the standard brake light and the center high mount stop light (CHMSL).
The 2057 bulb is the most frequently specified type across these specifications, appearing as the standard brake light fitment for the 1992-1994 Mitsubishi Expo.
The 2057 is a dual-filament bulb operating at 12V with a wattage split of 26.9W for the high-intensity filament and 8W for the low-intensity filament, mounted on a BAY15d bayonet base.
The BAY15d bayonet base uses an offset pin design, which physically prevents incorrect single-filament bulbs from being seated in dual-filament sockets.
The 1995 Mitsubishi Expo uses the 3496 for the standard brake light position, which is a dual-filament, 12V bulb also on a BAY15d bayonet base and classified as a variant of the 1157.
Although the 2057 and 3496 share the same BAY15d base type and both derive from the 1157 family, they are distinct part numbers and are not specified as interchangeable within these fitment records.
The CHMSL position on the 1992-1994 Expo uses the 921, a T15 wedge bulb rated at 12V and 16W, which is a single-filament design suited to on/off stop light functions.
The 1995 Expo CHMSL specification shifts to the 168, a T10 miniature wedge bulb rated at 12V and 4.9W, representing a notably lower wattage than the 921 used in prior model years.
The T10 and T15 designations refer to the bulb's tubular wedge form factor, with the numerical suffix indicating relative size; the two types are not physically interchangeable due to differing socket fits.
All four bulb types listed across these specifications conform to ANSI standards applicable in both the United States and Canada.