International A122 vehicles utilized 194 bulb size for front side marker applications and 97 bulb size for rear side marker positions. The replacement chart documents bulb specifications across 1957 to 1958 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International A122 uses two distinct bulb types across its front and rear side marker positions: the 194 for the front and the 97 for the rear, covering the 1957-1958 model years under the Light Duty classification.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W. The wedge base design means the bulb is held in place by tension from the socket itself rather than a separate locking mechanism.
The 97 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 13W. The BA15s base uses a single locating pin, which orients the bulb in one fixed rotational position within the socket.
The 97 bulb is a variant of the 1156. While the two share a similar bayonet base style, they are not interchangeable due to differences in wattage and physical construction. Using a 1156 in place of a 97 without confirming socket and circuit compatibility risks improper fitment or electrical mismatch.
The wattage difference between the two bulb types is substantial. The 97 rear side marker bulb draws 13W, while the 194 front side marker bulb draws only 3.78W. This reflects the different luminous output requirements between rear and front marker positions on the A122.
Both the 194 and 97 are recognized under ANSI standards applicable in both the United States and Canada, indicating standardized dimensional and electrical specifications across North American markets.