Ski-Doo Summit X E-TEC 800R Tail Light Bulb Size

The Ski-Doo Summit X E-TEC 800R uses a P21/5W bulb size for the tail light assembly. The replacement chart covers 2011 to 2012 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
2011-2012	P21/5W

Bulb Specifications

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

Other Locations

Additional Notes

The P21/5W is a dual-filament bulb operating on a 12V system, with the two filaments rated at 21W and 5W respectively. The higher-wattage filament typically serves the brake or stop function, while the lower-wattage filament handles the running or tail light function.
The P21/5W uses a BAY15d bayonet base, which features two offset pins positioned at different heights on the base. This offset pin arrangement prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The P21/5W designation follows ECE (Economic Commission for Europe) standards, meaning the bulb specification is recognized across European and worldwide markets rather than being exclusive to North American automotive standards.
The Ski-Doo Summit X E-TEC 800R uses the P21/5W for the tail light position across the 2011-2012 model years.