The International S132 front and rear turn signal bulbs both utilize a 198 size bulb for proper operation. This replacement chart covers vehicle production spanning 1953 to 1957.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 198 bulb is the sole turn signal bulb type specified for the International S132 across all listed model years, appearing in both the front and rear turn signal positions.
The 198 bulb follows the ANSI standard recognized in the United States and Canada, placing it within a defined regulatory framework for miniature automotive lighting.
It is classified as a T5 miniature wedge bulb, meaning it uses a wedge-style base rather than a bayonet or screw fitting, which determines socket compatibility.
The 198 bulb operates at 12 volts and draws 2 watts, reflecting a very low power output consistent with small indicator lighting rather than high-intensity applications.
All listed model years for the International S132 front and rear turn signals, spanning 1953-1957, carry a Light Duty classification, which refers to the vehicle's weight and load rating category.
Because the front and rear turn signal positions share the same bulb specification across all listed years, the 198 bulb serves a uniform fitment role throughout the entire 1953-1957 range on this model.
The wedge base design of the T5 bulb is not interchangeable with bayonet-base or screw-base sockets without an adapter, as the physical retention method differs between base types.