Suzuki Motorcycle M109R Boulevard Turn Signal Bulb Size
Suzuki Motorcycle M109R Boulevard front turn signal bulb size P21/5W and rear turn signal bulb size P21W are specified in this replacement chart. The chart covers 2006 through 2014 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 M109R Boulevard uses two distinct bulb types across its turn signal positions: P21/5W at the front and P21W at the rear, both conforming to ECE standards recognized across Europe and worldwide markets.
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 positioned at different heights, which prevents incorrect installation orientation.
The P21W is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base. The BA15s base features a single contact pin, distinguishing it physically from the dual-contact BAY15d base used at the front.
Because the P21/5W and P21W share the same 21W primary wattage but differ in base type and filament count, the two bulbs are not interchangeable between front and rear positions on the M109R Boulevard.
The front turn signal position calls for P21/5W across all listed model years, spanning 2006-2009 and 2011-2014.
The rear turn signal position calls for P21W across the same model year range, 2006-2009 and 2011-2014, maintaining a consistent single-filament specification throughout.
The BAY15d base used in the front P21/5W bulb is a keyed fitting, meaning only a dual-filament bulb with the correct offset pin configuration will seat properly in the front signal housing.