Ski-Doo MX Z 1200 Brake Bulb Size

Ski-Doo MX Z 1200 brake bulb utilizes a P21/5W size for replacement applications across the specified model line. The replacement chart covers 2009 through 2011 production years with corresponding bulb size specifications.

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
2009-2011	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

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Additional Notes

The P21/5W is the brake bulb type specified for the Ski-Doo MX Z 1200 across the 2009-2011 model years.
P21/5W is an ECE-regulated standard, meaning it conforms to European and internationally recognized lighting regulations rather than SAE standards used in North America.
The bulb operates on a 12-volt electrical system and carries a dual-wattage rating of 21W and 5W, corresponding to its two filaments, which serve separate functions such as braking and running light modes.
The BAY15d bayonet base is a dual-contact fitting with offset pins, a design that prevents incorrect single-filament bulbs from being seated in place of the dual-filament P21/5W.
Because the P21/5W shares a physical base type with some single-filament variants, substituting an incorrect bulb risks losing one of the two lighting functions, making filament count a critical factor in replacement selection.