Polaris 550 Classic Brake Bulb Size

The Polaris 550 Classic brake light requires a 921 bulb size for proper installation and function within the lighting assembly. Data for the specific component covers the range from 2002 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
2002-2008	921	W16W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921	Check Price

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Additional Notes

The 921 is the sole brake bulb size listed for the Polaris 550 Classic across the 2002-2008 model years.
The 921 bulb follows the ANSI standard, which is the recognized specification system used in the United States and Canada for automotive and powersports lighting components.
It is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope width expressed in eighths of an inch, placing it at approximately 15/8 of an inch across.
The wedge base design means the bulb is held in place by the socket gripping the base of the glass directly, with no separate metal base or pins involved.
The 921 operates at 12 volts and draws 16 watts, which are the electrical values that must be matched when substituting any equivalent bulb to avoid circuit or socket damage.
Because the 921 is an ANSI-standardized part, other bulbs sharing the same T15 wedge form and 12V/16W rating are generally considered interchangeable, provided the physical socket fit is confirmed.