International R132 front side marker bulbs use 194 size while rear side marker bulbs use 97 size. The replacement chart covers 1953 to 1955 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 International R132 uses two distinct bulb types across its front and rear side marker positions for the 1953-1955 model years: the 194 at the front and the 97 at the rear.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, and is designated for Light Duty front side marker positions on the International R132.
The T10 wedge base of the 194 bulb connects by friction fit rather than a bayonet or screw mechanism, which is a defining characteristic of the wedge base design.
The 97 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and is designated for Light Duty rear side marker positions on the International R132.
The BA15s bayonet base of the 97 bulb features a single locating pin, which distinguishes it from double-pin bayonet variants and is relevant to fitment compatibility.
The 97 is described as a variant of the 1156 bulb type. Despite this relationship, the two are not directly interchangeable, as physical and electrical differences between variants can affect fitment and circuit load.
The wattage difference between the two bulb types is substantial. The rear 97 bulb draws 13W compared to the front 194 at 3.78W, reflecting the greater illumination demand typically placed on rear marker positions.
Both the 194 and 97 carry ANSI standardization applicable to the US and Canadian markets, meaning their specifications conform to a defined industry standard rather than a proprietary format.
Both bulb types operate on a 12V system, consistent with the standard automotive electrical architecture of the era in which the International R132 was produced.