The International S1654 uses 168 and 1895 bulb sizes for front side marker applications, with 168 bulbs specified for rear side marker positions. The replacement chart covers 1984 through 1989 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 S1654 uses two distinct bulb types across its front and rear side marker positions: the 168 and the 1895, both of which are ANSI-standard miniature wedge bulbs rated for 12-volt systems.
The 168 bulb follows the T10 wedge form factor and draws 4.9 watts, making it the more power-intensive of the two types specified for this vehicle.
The 1895 bulb follows the T5 wedge form factor and draws only 0.9 watts, a notably lower wattage than the 168.
The T10 and T5 designations refer to the bulb's tubular body width, with T10 being physically larger than T5. These two types are not interchangeable despite both using a wedge base.
On the International S1654, the rear side marker position uses the 168 bulb uniformly across all model years from 1984-1989.
The front side marker position of the S1654 does not follow the same uniformity. The 1895 bulb was specified for the 1986-1987 model years, while the 168 bulb was specified for 1984-1985 and 1988-1989.
The front side marker bulb type changed between the 1985 and 1986 model years, and again between the 1987 and 1988 model years, meaning a vehicle from 1987 requires a different front side marker bulb than one from 1988 despite being consecutive years.
Because the front side marker specification varies by year on the S1654, confirming the exact model year before sourcing a replacement front side marker bulb is necessary to avoid an incorrect fitment.