Mitsubishi Fuso FM high beam and low beam headlight bulbs utilize H6054 and H5001 sizes for high beam applications, with H6054 and H5006 sizes for low beam configurations. The replacement chart covers vehicle production spanning 1986 to 1995, detailing bulb size specifications across the model range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mitsubishi Fuso FM uses three sealed beam unit types across its headlight specifications: H6054, H5001, and H5006. All three conform to ANSI standards recognized in the United States and Canada and operate at 12 volts.
All three bulb types are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H5001 is a 4-inch square sealed beam unit designated for high beam service. It is the specified high beam unit for the FM across the 1986-1993 model years, as well as for 1994-1995 models equipped with a four-headlamp configuration.
The H5006 is a 5.75-inch round sealed beam unit designated for low beam service. It serves the FM in the same fitment pattern as the H5001, covering 1986-1993 and the four-headlamp variant of 1994-1995.
The H6054 is a 5x7-inch rectangular sealed beam unit. On the Mitsubishi Fuso FM, it functions as both the high beam and low beam unit, but only in 1994-1995 models fitted with a two-headlamp configuration. A single unit type therefore handles both beam functions in that setup.
The 1994-1995 FM headlamp configuration is a critical fitment variable. Vehicles with two headlamps use H6054 units for both high and low beam, while vehicles with four headlamps use H5001 for high beam and H5006 for low beam. Substituting one configuration's units for the other's would result in an incorrect fitment.
The H6054 and H5001 are not interchangeable despite both serving high beam functions on the FM. They differ in physical form factor, with the H6054 being a rectangular unit and the H5001 being a square unit, making them mechanically incompatible with each other's housings.
The H5001 and H5006 share the same 4-inch square and 5.75-inch round form factors respectively, each assigned to a specific beam function. Neither unit is rated for dual-beam operation in the FM specifications, unlike the H6054 used in the two-headlamp arrangement.