Mitsubishi Fuso FG headlight bulbs utilize H6054 and H5001 sizes for high beam applications, with H6054 and H5006 sizes for low beam configurations. The replacement chart covers 1990 to 1998 production 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 Mitsubishi Fuso FG headlight specifications cover the 1990-1993 and 1998 model years, with all listed configurations operating on 12V sealed beam units conforming to ANSI standards recognized in the United States and Canada.
Three sealed beam types appear across the specifications: H6054, H5001, and H5006. All three are self-contained units in which the lens, reflector, and filament form a single assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6054 is a 5x7-inch rectangular sealed beam. It serves as both the high beam and low beam source on 1998 FG models equipped with a two-headlamp configuration, where a single unit per side handles both functions.
The H5001 is a 4-inch square sealed beam dedicated to the high beam function. It is specified for the 1990-1993 FG across all listed years, as well as for the 1998 FG in four-headlamp configurations.
The H5006 is a 5.75-inch round sealed beam assigned exclusively to the low beam function. It appears in the 1990-1993 FG and in the 1998 four-headlamp variant, pairing with the H5001 in those configurations.
The 1998 FG headlamp configuration is a critical fitment variable. The two-headlamp system uses H6054 units for both beams, while the four-headlamp system splits functions between H5001 for high beam and H5006 for low beam, making configuration verification necessary before replacement.
The H5001 and H5006 are not interchangeable despite both being 4-inch-class square and round sealed beams respectively. Their beam patterns are engineered for distinct functions, and substituting one for the other would alter light projection in ways inconsistent with the original design intent.
Because all three bulb types are ANSI-standardized sealed beam units, physically compatible replacements from multiple manufacturers are generally available, provided the correct ANSI designation is matched exactly.