International S1853 front side marker bulbs use 168 or 1895 bulb sizes, while rear side marker bulbs use 168 size. The replacement chart covers vehicle production years spanning 1981 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The two bulb types specified for the International S1853 side marker positions are the 168 and the 1895, both of which conform to ANSI standards recognized in the United States and Canada.
The 168 bulb is a T10 miniature wedge type rated at 12 volts and 4.9 watts, making it the higher-wattage of the two bulb types present in these specifications.
The 1895 bulb is a T5 miniature wedge type rated at 12 volts and 0.9 watts, representing a significantly lower power draw than the 168.
Although both bulbs share a miniature wedge base design, the T10 and T5 designations indicate different physical sizes, meaning the 168 and 1895 are not interchangeable with one another.
The rear side marker position on the International S1853 uses the 168 bulb uniformly across all model years from 1981-1989.
The front side marker position does not follow the same uniformity, with the 1895 bulb specified for 1983, 1985, and 1987 while the 168 bulb is specified for all remaining years in the 1981-1989 range.
Because the front side marker bulb type varies by year on the International S1853, confirming the exact model year is necessary before selecting a replacement bulb for that position.
The rear side marker position accepts only the 168 bulb across the entire 1981-1989 span, so year variation is not a factor when sourcing a replacement for that location.