The Mitsubishi Galant brake light components utilize 7443, 2057, 1156, and 1157 bulb sizes for various lighting applications across the vehicle lighting system. Available data for the specified lighting equipment covers the production range from 1985 through 2012.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mitsubishi Galant brake light circuit uses three distinct bulb types across its production span: the 2057, 7443, 1157, and 1156, all of which conform to ANSI standards applicable in the United States and Canada.
The 2057 is the most frequently specified brake bulb across the Galant lineup, covering model years 1989-1993 and 1995-2007. It is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 26.9W on its high-intensity filament, with 8W on its low-intensity filament.
The 7443 replaces the 2057 for the 2009-2012 Mitsubishi Galant brake application. Unlike the 2057, the 7443 uses a wedge-style T20 base rather than a bayonet mount, making the two bulbs physically incompatible despite both being dual-filament types.
The 1157 is specified for the 1985-1988 Galant brake position. It shares the BAY15d bayonet base with the 2057 but operates at a lower high-filament wattage of 21W compared to the 2057's 26.9W, which means the two are not direct equivalents despite their physical similarity.
The 1156 appears in the 1992 and 1994 Galant brake position. It uses a BA15s single-contact bayonet base and carries a single 21W filament, making it incompatible with the dual-filament 2057 and 1157 bulbs that share a visually similar bayonet form factor.
The BAY15d base used by both the 2057 and 1157 features two offset pins that prevent single-filament BA15s bulbs, such as the 1156, from being seated correctly, serving as a physical safeguard against incorrect substitution.
The center high mount stop light on the Mitsubishi Galant uses the 921 bulb for the majority of its production years, spanning 1985-1991 and 1995-2012. The 921 is a T15 wedge bulb rated at 12V and 16W with a single filament.
The 1992-1994 Galant center high mount stop light uses the 168 bulb instead of the 921. The 168 is a T10 miniature wedge type rated at only 4.9W, a substantially lower output than the 16W 921, and the two wedge bulbs are not interchangeable due to differing physical sizes.
The 921 wedge base and the T20 wedge base of the 7443 are not the same form factor. The 921 is a T15 type, and inserting an incorrectly sized wedge bulb risks poor contact or socket damage.
All bulb types specified across the Galant brake and center high mount stop light positions operate on a 12V electrical system, consistent with standard automotive electrical architecture.