Polaris Sport Brake Bulb Size

The Polaris Sport brake light utilizes bulb size 921 and bulb size 90 for the specific lighting components located at the rear of the vehicle. Data for the provided specifications covers the period from 1987 through 2000 for the mentioned equipment.

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
1993-2000	921
1987-1992	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The Polaris Sport uses two distinct brake bulb types across its model years: the 921 for 1993-2000 and the 90 for 1987-1992.
The 921 is a T15 wedge bulb rated at 12V and 16W under the ANSI standard applicable in the United States and Canada. The wedge base design means the bulb is held in place by friction rather than a locking mechanism.
The 90 is a single-filament bulb rated at 12V and 13W, also conforming to the ANSI standard for the US and Canadian markets. It uses a BA15s bayonet base, which requires an insert-and-twist motion to seat and release.
The two bulb types are not interchangeable. The 921 uses a wedge base while the 90 uses a BA15s bayonet base, meaning the socket designs are physically incompatible with one another.
The 921 operates at 16W compared to the 90's 13W, reflecting a difference in power draw between the two generations of fitment.
Both bulb types operate on a 12V electrical system, which is the standard automotive voltage for low-voltage vehicle lighting circuits.