Ski-Doo Formula Z Tail Light Bulb Size

The Ski-Doo Formula Z tail light requires a bulb size of 1157 for proper operation and visibility. Data for the specified component covers the range from 1994 to 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
1994-1999	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 size specified for the Ski-Doo Formula Z across the 1994-1999 model years.
The 1157 is a dual-filament bulb, meaning it serves two lighting functions within a single unit, typically combining stop light and running light operation.
It operates on a 12-volt electrical system and carries a wattage rating of 21W on the high-filament circuit and 5W on the low-filament circuit.
The 1157 uses a BAY15d bayonet base, which features two offset pins that prevent incorrect insertion into the socket.
The 1157 designation follows the ANSI standard recognized in both the United States and Canada, establishing a consistent specification across North American applications.
Because the 1157 is a dual-filament type, substituting a single-filament bulb of a similar base style would result in the loss of one lighting function, making filament count a critical factor in replacement compatibility.