Ski-Doo GSX 500SS Tail Light Bulb Size

The Ski-Doo GSX 500SS tail light uses a 1157 bulb size for this snowmobile model. The replacement chart covers 2004 through 2009 production years with corresponding bulb size 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
2004-2009	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 GSX 500SS uses the 1157 bulb for its tail light across the 2004-2009 model years.
The 1157 is an ANSI-standardized bulb type recognized across the United States and Canada, establishing a consistent specification for fitment and replacement.
This bulb operates on a 12-volt electrical system, which is standard for powersports vehicles in this class.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single housing. The higher-output filament runs at 21 watts for braking or turn signal functions, while the lower-output filament runs at 5 watts for running light functions.
The bulb uses a BAY15d bayonet base, a two-pin offset base type. The offset pin placement is a deliberate design feature that prevents incorrect insertion, ensuring the two filaments are always oriented to their correct circuits.
Because the BAY15d base uses offset pins, it is not interchangeable with the BAY15s base, which is a single-filament bayonet fitting of otherwise similar physical form. Substituting a single-filament 1156 bulb, which uses the BAY15s base, would not correctly engage the socket and would not replicate the dual-filament function.