Ski-Doo MX Z 600 X Brake Bulb Size

The Ski-Doo MX Z 600 X brake light utilizes unique bulb sizes 1157 and 921 and P21/5W across various production versions. Data for the specific lighting components covers the range from 2001 through 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
2008-2010	1157	P21/5W	Check Price
2007	921	W16W	Check Price
2001-2006	1157	P21/5W	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 1157 is the dominant brake bulb type across the Ski-Doo MX Z 600 X, appearing in nine of the ten model years covered, specifically 2001-2006 and 2008-2010.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W/5W output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary lighting function.
The BAY15d bayonet base features two offset pins, a design that prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The 2007 Ski-Doo MX Z 600 X departs from the surrounding model years by specifying a 921 bulb rather than the 1157.
The 921 is a single-filament wedge-type bulb in a T15 form factor, rated at 12V and 16W, and it uses no base pins, instead relying on the tension of the socket contacts to hold it in place.
Because the 1157 uses a BAY15d bayonet base and the 921 uses a wedge base, the two bulb types are not physically interchangeable despite sharing the same 12V operating voltage.
Both the 1157 and 921 are classified under ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical tolerances for each type.
The filament count also differs between the two types, as the 1157 carries dual filaments while the 921 carries a single filament, meaning they serve different circuit configurations and cannot substitute for one another functionally.