Ski-Doo Expedition (LE/SE/SWT/Xtreme) Brake Bulb Size

Ski-Doo Expedition (LE/SE/SWT/Xtreme) brake bulb uses a P21/5W size. The replacement chart covers 2011 through 2019 production years with corresponding bulb 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
2011-2019	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 Ski-Doo Expedition (LE/SE/SWT/Xtreme) uses the P21/5W bulb as the brake bulb fitment across the 2011-2019 model years.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, one rated at 21 watts and one at 5 watts, allowing it to serve both a high-intensity brake function and a lower-intensity running light function simultaneously.
The P21/5W operates on a 12-volt electrical system, which is standard for powersports and automotive lighting applications.
The bulb uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to ensure the bulb can only be inserted in one orientation, preventing incorrect filament alignment.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide.
Because the BAY15d base is offset, it is not interchangeable with the similarly named BA15d base, which features pins at equal heights, and substituting one for the other would result in an improper fit.