Suzuki Motorcycle SFV650 Brake Bulb Size

The Suzuki Motorcycle SFV650 brake utilizes a P21/5W bulb size for the lighting component. Data for the specific bulb requirements covers the range from 2013 through 2015.

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
2013-2015	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 P21/5W is the brake bulb type specified for the Suzuki Motorcycle SFV650 across the 2013-2015 model years.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. The higher-rated 21W filament activates for braking signals, while the lower-rated 5W filament serves as a running light.
The P21/5W operates on a 12V electrical system, which is standard for motorcycles of this class.
The bulb uses a BAY15d bayonet base. The offset pins of the BAY15d base are positioned at different heights, a design that prevents incorrect insertion and ensures the two filaments are connected to the correct circuits.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, giving it broad acceptance across European and international markets. This standardization means equivalent bulbs from different manufacturers are generally interchangeable provided the BAY15d base and 21W/5W ratings are matched.
Substituting a single-filament bulb or a bulb with a different base type, such as the visually similar BA15s, would result in incorrect fitment or circuit incompatibility for the SFV650 brake light assembly.