Suzuki Motorcycle DR650S Tail Light Bulb Size

The Suzuki Motorcycle DR650S tail light requires a P21/5W bulb size for proper operation and visibility. Data for the specified component covers the period from 2015 through 2019.

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
2007-2009	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 Suzuki Motorcycle DR650S uses the P21/5W bulb for its tail light across the 2007-2012 and 2013-2019 model years.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. The 21W filament serves the brake light function, while the 5W filament handles the running light function.
The P21/5W operates on a 12V electrical system, which is standard for motorcycles of this type.
The bulb uses a BAY15d bayonet base. The BAY15d designation indicates an offset pin configuration, where the two pins are positioned at different heights on the base. This offset prevents incorrect installation of a single-filament bulb in place of a dual-filament unit.
The P21/5W conforms to ECE (Economic Commission for Europe) standards, giving it broad acceptance across European and international markets.
Because the BAY15d base is offset, a single-filament BAY15s bulb is not a compatible substitute for the DR650S tail light socket, even though the physical size of the base may appear similar.