International 9300 License Plate Bulb Size

The International 9300 license plate requires a 1157 bulb size for proper illumination of the rear vehicle identification area. Available data for the specified lighting component covers the period from 1988 through 1997.

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
1988-1997	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 9300 uses the 1157 bulb for its license plate position across all listed model years, spanning 1988-1997.
The 1157 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across those markets.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, each operating at a different wattage: 21W for the higher-intensity filament and 5W for the lower-intensity filament.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in most commercial vehicles of this type.
The 1157 uses a BAY15d bayonet base, which is an offset twin-pin mount. The offset pin placement is a deliberate fitment control, as it prevents the bulb from being inserted in an incorrect orientation, which would misalign the two filaments with their intended circuits.
Because the BAY15d base has offset pins, it is not interchangeable with single-filament bayonet bulbs that use a BAY15s base, despite the physical similarity of the mount style.