Ski-Doo MX Z X Tail Light Bulb Size

Ski-Doo MX Z X tail light uses a P21/5W bulb size for replacement applications. The replacement chart covers 2011 to 2018 vehicle 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	US Type	EU Type	Shop
2011-2018	1157	P21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price

Other Locations

Additional Notes

The P21/5W is the specified tail light bulb for the Ski-Doo MX Z X across the 2011-2018 model years.
P21/5W is a dual-filament bulb, with one filament rated at 21 watts and a second rated at 5 watts, allowing it to serve two lighting functions within a single unit.
The bulb operates on a 12-volt electrical system, which is standard for powersports vehicles of this type.
P21/5W uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by positioning the pins at different heights.
The P21/5W designation follows ECE (Economic Commission for Europe) standards, meaning the bulb is rated and tested under a internationally recognized regulatory framework.
Because the BAY15d base is offset, it is not interchangeable with the similarly sized BA15d base, which has pins at equal heights. Substituting one for the other is not physically compatible.