Ski-Doo MX Z X-RS 600 Brake Bulb Size

The Ski-Doo MX Z X-RS 600 brake utilizes a 921 bulb size for the lighting system. Data for the specific component covers the range from 2009 to 2010.

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
2009-2013	921	W16W	Check Price

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

The 921 bulb is the brake bulb size specified for the Ski-Doo MX Z X-RS 600 across the 2009-2013 model years.
The 921 is an ANSI-standardized bulb type, meaning its physical and electrical characteristics conform to a defined North American standard recognized in both the United States and Canada.
The 921 bulb uses a wedge-style base, classified under the T15 designation. A wedge base relies on the tension of its contacts rather than a bayonet or screw mechanism to secure the bulb in its socket.
The 921 operates at 12 volts and draws 16 watts, which places it in the range typical of single-filament automotive and powersports lighting applications.
Because the 921 is a single-filament bulb, it serves a dedicated function rather than combining multiple lighting roles such as brake and tail in one unit.
The T15 designation refers to the bulb's tubular envelope size, expressed in eighths of an inch, making the envelope approximately 15 eighths of an inch wide.
Wedge-base bulbs such as the 921 are not interchangeable with bayonet-base or screw-base types, even when voltage and wattage ratings are otherwise similar.