Suzuki Motorcycle C50 Boulevard Turn Signal Bulb Size
Suzuki Motorcycle C50 Boulevard front turn signal bulb size P21/5W and rear turn signal bulb size P21W are specified in this replacement chart. The chart covers 2005 through 2019 model 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 C50 Boulevard uses two distinct bulb types across its turn signal positions: the P21/5W at the front and the P21W at the rear, both conforming to ECE standards recognized in Europe and worldwide. This distinction holds across the 2005-2019 model years covered in the specifications.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament. It uses a BAY15d bayonet base, which features two offset pins to prevent incorrect installation of the dual-filament configuration.
The P21W is a single-filament bulb rated at 12V and 21W. It uses a BA15s bayonet base, which has a single locating pin. Because the BA15s and BAY15d bases are physically different, the front and rear turn signal bulbs of the Suzuki Motorcycle C50 Boulevard are not interchangeable with each other.
The front turn signal position of the C50 Boulevard specifies the P21/5W across all listed model years from 2005-2019, indicating a consistent dual-filament requirement for that position throughout the covered production span.
The rear turn signal position specifies the single-filament P21W across all listed model years from 2005-2019, reflecting a different functional requirement at the rear compared to the front.
The use of dual-filament P21/5W bulbs at the front suggests that position serves more than one lighting function, as the 5W filament typically operates as a running or position light while the 21W filament activates for signalling.