Suzuki Motorcycle M50 Boulevard Parking Light Bulb Size

The Suzuki Motorcycle M50 Boulevard parking light requires a P21/5W bulb size for the lighting component. Available data covers the period from 2013 through 2019 for the specified vehicle.

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
2013-2019	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

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Additional Notes

The P21/5W is the specified parking light bulb for the Suzuki Motorcycle M50 Boulevard across the 2013-2019 model years.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. The higher 21W filament serves signalling functions, while the lower 5W filament handles the parking or position 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 around the base. This asymmetric design prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, giving it broad acceptance across European and international markets.
Because the BAY15d base uses offset pins, it is not interchangeable with the BA15d base, which features pins at equal heights. Substituting a BA15d bulb into a BAY15d socket is not possible without modification.