The Mitsubishi Expo high beam and low beam headlight bulbs both utilize a 9003 bulb size. The replacement chart covers vehicle production years spanning 1992 to 1995.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 bulb is an ANSI-standard halogen type recognized in the United States and Canada, operating at 12 volts with a dual-filament design rated at 60 watts on the high beam filament and 55 watts on the low beam filament.
The P43t base is a bayonet-style mount with a 43mm collar, which physically locks the bulb into the headlight housing and ensures correct alignment of the filaments relative to the reflector.
The Mitsubishi Expo uses the 9003 bulb size across both the high beam and low beam headlight positions for the full 1992-1995 model range.
Because a single 9003 bulb serves both beam functions through its two filaments, each headlight housing on the Expo requires only one bulb rather than separate units for each beam.
The 9003 is functionally interchangeable with the HB2 designation, as both refer to the same dual-filament halogen specification under different naming conventions.
The consistent use of the 9003 across all four model years means a single bulb specification applies to the entire production run of the Expo without variation by year.