Hino FF17 front side marker bulbs use 194 or P21W size, while rear side marker bulbs use 67 size. The replacement chart covers 1987 to 1991 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Hino FF17 front side marker uses two distinct bulb types across its model years: the 194 for 1989-1991 and the P21W for 1987-1988.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, and is common in North American automotive applications.
The P21W follows the ECE standard used in European and worldwide markets, featuring a BA15s single-contact bayonet base and a significantly higher output at 12V and 21W.
The shift from P21W to the 194 between the 1988 and 1989 Hino FF17 front side marker represents a change in both bulb standard and wattage, making the two types non-interchangeable despite sharing the same 12V operating voltage.
The BA15s bayonet base is shared between the P21W and the 67, though the two bulbs differ substantially in wattage, with the P21W rated at 21W and the 67 rated at 8W, meaning they are not interchangeable.
The 67 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 8W, and is considered a lower-wattage variant of the 1156 bulb family.
The Hino FF17 rear side marker uses the 67 bulb exclusively across the 1989-1991 model years.
The T10 wedge base of the 194 and the BA15s bayonet base of the P21W and 67 are physically incompatible mounting types, requiring attention to base type when sourcing replacements.