International S1854 License Plate Bulb Size

The International S1854 license plate light requires a bulb with the specific size 1157 for proper illumination. Available information for the vehicle covers the period from 1981 to 1989.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1981-1989	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The International S1854 uses the 1157 bulb for its license plate lighting across all listed model years, spanning 1981-1989.
The 1157 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 1157 is a dual-filament bulb, containing two separate filaments within a single envelope that operate at different wattages: 21W for the higher-intensity filament and 5W for the lower-intensity filament.
The base type on the 1157 is a BAY15d bayonet mount, which features two offset pins at different heights to prevent incorrect insertion of a single-filament substitute.
The BAY15d base design is a physical safeguard against cross-fitment with single-filament bayonet bulbs, such as the 1156, which shares a similar but non-identical base configuration.
The 1157 operates on a 12V electrical system, consistent with the standard automotive voltage found in light trucks and commercial vehicles of the production era covered by these specifications.