Ski-Doo GSX 800 Tail Light Bulb Size

Additional Notes

• The Ski-Doo GSX 800 uses the 1157 bulb across all listed model years, spanning 2004-2008 and 2012-2015.
• The 1157 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning replacements are widely available through standard automotive and powersports suppliers.
• This bulb is a dual-filament type, meaning it contains two separate filaments within a single housing, allowing it to serve two distinct lighting functions simultaneously, such as running light and brake light operation.
• The 1157 uses a BAY15d bayonet base, which is an offset two-pin mount. The asymmetric pin placement prevents the bulb from being inserted in the wrong orientation, ensuring correct filament alignment within the socket.
• The bulb operates at 12 volts, consistent with the standard electrical systems found in powersports vehicles of this type.
• The two wattage ratings, 21W and 5W, correspond to the high-intensity and low-intensity filaments respectively. The lower filament typically handles continuous running light duty, while the higher filament activates under braking.
• Because the 1157 is a dual-filament bulb, it is not directly interchangeable with single-filament variants such as the 1156, which shares a similar bayonet base style but carries only one filament and different wattage characteristics.