Ski-Doo Formula SS Tail Light Bulb Size

The Ski-Doo Formula SS tail light requires a bulb with the unique size 1157 for proper operation. Data for the specific component covers the range from 1995 to 1996.

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
1995-1996	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 1157 is the tail light bulb type used in the Ski-Doo Formula SS across the 1995-1996 model years.
The 1157 follows the ANSI standard recognized in the United States and Canada, making it a widely available replacement type in North American markets.
This bulb operates on a dual-filament design, with one filament rated at 21W for braking or turn signal functions and a second filament rated at 5W for running light functions.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights to ensure correct orientation during installation and prevent incorrect fitment.
The bulb is rated at 12 volts, consistent with standard 12V electrical systems found in powersports vehicles of this type.
The BAY15d base is specific to dual-filament applications and is not interchangeable with single-filament bayonet bases such as the BA15s, which shares a similar physical profile but lacks the second pin offset.