Polaris 600 RMK Brake Bulb Size

The Polaris 600 RMK brake light utilizes 1157 and 921 bulb sizes for the lighting system. Data for the provided specifications covers the period from 1998 through 2006.

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	US Type	EU Type	Shop
2001-2011	1157	P21/5W	Check Price
1998-2000	921	W16W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921	Check Price

Other Locations

Additional Notes

The Polaris 600 RMK uses two distinct brake bulb types across its model years: the 1157 and the 921, both of which conform to ANSI standards recognized in the United States and Canada.
The 1157 bulb is a dual-filament type mounted on a BAY15d bayonet base, rated at 12V with a wattage split of 21W for the primary filament and 5W for the secondary filament. This dual-filament design allows a single bulb to serve both a running light function and a brighter brake light function.
The 921 is a single-filament wedge bulb of the T15 form factor, rated at 12V and 16W. Unlike the 1157, it carries only one filament, which limits it to a single lighting function.
The Polaris 600 RMK (2001-2011) specifies the 1157 bulb for the brake light position across all eleven model years in that span.
The 1998-2000 model years specify the 921 wedge bulb for the brake light position.
The BAY15d bayonet base of the 1157 features two offset pins that prevent incorrect insertion, a physical characteristic that distinguishes it from the pinless wedge base of the 921. These two bulb types are not interchangeable due to their differing base designs and filament configurations.