The International R132 front and rear turn signal bulbs both require a 198 size bulb for proper operation. This replacement chart covers vehicle production spanning 1953 to 1955.
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 bulb type listed across all turn signal positions in the International R132 specifications.
The 198 bulb follows the ANSI standard, meaning it conforms to the American National Standards Institute classification system used across the United States and Canada.
It is a miniature wedge bulb in the T5 form factor, which refers to a tubular glass envelope roughly 5/8 of an inch wide with a wedge-style base that requires no separate socket locking mechanism.
The 198 bulb operates at 12 volts and draws 2 watts, placing it among the lower-output bulbs in automotive applications.
The International R132 specifications cover the 1953-1955 model years under the Light Duty classification for both front and rear turn signal positions.
The front and rear turn signal positions share the same 198 bulb specification across all listed model years, indicating a uniform fitment requirement between both ends of the vehicle.
The wedge base design of the 198 bulb is not interchangeable with bayonet-base or screw-base bulb types, even when voltage and wattage ratings may otherwise align.