Suzuki Motorcycle M50 Boulevard Turn Signal Bulb Size
Suzuki Motorcycle M50 Boulevard front turn signal bulb size is P21/5W and rear turn signal bulb size is P21W. The replacement chart covers 2013 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.
The Suzuki Motorcycle M50 Boulevard uses two distinct bulb types across its turn signal positions: the P21/5W at the front and the P21W at the rear, with this configuration remaining consistent across the 2013-2019 model years.
The P21/5W is a dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, mounted on a BAY15d bayonet base. The offset pins of the BAY15d base are a deliberate design feature that prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The P21W is a single-filament bulb rated at 12V and 21W, using a BA15s bayonet base. Unlike the BAY15d, the BA15s base has symmetrically placed pins, reflecting its simpler single-filament construction.
Both bulb types conform to ECE standards, a regulatory framework recognized across Europe and numerous other markets worldwide, governing performance and dimensional requirements for automotive lighting components.
The front and rear turn signal bulbs on the M50 Boulevard (2013-2019) are not interchangeable. The P21/5W and P21W use different base types, BAY15d and BA15s respectively, which are physically incompatible with each other's sockets.
Although both bulbs share the same 21W signalling filament output, the P21/5W front bulb carries an additional 5W filament, which serves a secondary lighting function not present in the rear P21W unit.