Polaris 440 XCR Brake Bulb Size

The Polaris 440 XCR brake utilizes 921 and 90 bulb sizes for the lighting components. Available data covers the period from 1992 through 1999 for the specified vehicle.

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

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1994-1999	921	W16W	Check Price
1992-1993	90	90	Check Price

Bulb Specifications

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

Other Locations

Additional Notes

The Polaris 440 XCR uses the 921 bulb for brake lighting across the 1994-1999 model years, while the 1992-1993 model years use the 90 bulb instead.
The 921 is a T15 wedge-base bulb operating at 12 volts and 16 watts, conforming to ANSI standards recognized in both the United States and Canada.
The 90 bulb is a single-filament type fitted with a BA15s bayonet base, operating at 12 volts and 13 watts, also under ANSI standards for the US and Canadian markets.
The BA15s bayonet base of the 90 bulb and the wedge base of the 921 are physically incompatible mounting types, meaning the two bulbs are not interchangeable despite sharing the same 12-volt operating voltage.
The 921 draws 3 watts more than the 90, a difference that reflects distinct circuit and socket specifications between the two fitment generations of the 440 XCR.