Polaris 700 SKS Brake Bulb Size

The Polaris 700 SKS brake light utilizes 1157 and 921 bulb sizes for the lighting components. Data for the specified vehicle covers the period from 1997 through 2003.

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
2003	1157
1999-2002	921
1997	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The 921 is a T15 wedge-type bulb operating at 12V with a 16W output. Its wedge base design means it requires no separate socket locking mechanism, as the bulb body itself acts as the retention element.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V and carrying two wattage ratings of 21W and 5W. The two filaments serve separate functions, typically high-intensity output for braking and low-intensity output for running light operation.
Both the 921 and 1157 are ANSI-standardized bulbs recognized across the US and Canadian markets, meaning they conform to defined performance and dimensional standards rather than proprietary specifications.
The Polaris 700 SKS used the 921 bulb for the brake light across the 1997 and 1999-2002 model years, representing the predominant fitment across the listed specification range.
The 2003 Polaris 700 SKS specifies the 1157 bulb, which differs from the 921 in both base type and filament count. The 921 uses a wedge base while the 1157 uses a BAY15d bayonet base, making the two bulbs physically incompatible and non-interchangeable.
The wattage difference between the two bulbs is also a relevant fitment consideration. The 921 draws 16W as a single-filament bulb, while the 1157 draws either 21W or 5W depending on which filament is active, meaning the socket wiring and circuit expectations differ between the two configurations.