Ski-Doo Formula Deluxe Tail Light Bulb Size

Ski-Doo Formula Deluxe tail light requires a 1157 bulb size for proper illumination. The replacement chart covers 1997 through 2001 production years with corresponding bulb specifications.

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
1997-2001	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 Ski-Doo Formula Deluxe uses the 1157 bulb for its tail light across the 1997-2001 model years.
The 1157 is a dual-filament bulb, meaning it serves two lighting functions within a single unit, typically handling both running light and brake light duties through separate filaments rated at 5W and 21W respectively.
The bulb operates on a 12V electrical system, which is standard for powersports vehicles of this type.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by ensuring the pins are positioned at different heights.
The 1157 is classified under the ANSI standard and is recognized in both the United States and Canada, reflecting broad regional availability.
Because the 1157 is a dual-filament type, single-filament substitutes such as the 1156 are not interchangeable, as they lack the second filament required for full tail light function.