The Mitsubishi Diamante brake light utilizes 7443, 3496, and 2057 bulb sizes depending on the specific version of the vehicle. Data for the lighting components covers the range from 1992 to 2004.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mitsubishi Diamante uses three distinct bulb types across its brake light positions: the 2057, 3496, and 7443 for the main brake lights, and the 921 exclusively for the center high mount stop light.
The 2057 is the most frequently specified brake bulb across the Diamante's production run, covering model years 1992-1998 and 2000, making it the dominant fitment across the majority of the vehicle's lifespan.
The 2057 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a power draw of 26.9W on the high filament and 8W on the low filament, functioning as a brighter variant of the 1157.
The 7443 is a dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W/5W output, and it replaced earlier fitments on the Mitsubishi Diamante for the 2002-2004 model years.
The 3496 shares the BAY15d bayonet base with the 2057 and is classified as a variant of the 1157, though the two are not interchangeable due to differing electrical characteristics and physical tolerances.
The 3496 was specified for the Diamante in 1999 and 2001, representing isolated fitment years between periods when other bulb types were used, which indicates a physical socket or electrical compatibility distinction for those model years.
The 7443 uses a wedge base rather than a bayonet base, meaning it is not physically interchangeable with either the 2057 or the 3496 despite all three serving the same brake light function across different model years.
The 921 is a single-filament wedge bulb in the T15 form factor, rated at 12V and 16W, and it serves the center high mount stop light position on the Diamante across all model years from 1992 to 2004 without variation.
All four bulb types specified for the Diamante conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and photometric performance requirements.
The consistent use of the 921 across all thirteen model years of the Diamante contrasts with the variation seen in the main brake light position, where three different bulb types were used across the same production span.