Suzuki Motorcycle S40 Boulevard License Plate Bulb Size

The Suzuki Motorcycle S40 Boulevard uses a 12821 bulb for the license plate light component. Available data for the bulb covers the range from 2005 through 2019.

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 Type	Shop
2011-2019	12821	Check Price
2005-2009	12821	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821	Check Price

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Additional Notes

The Suzuki Motorcycle S40 Boulevard uses the 12821 bulb for its license plate position across the 2005-2009 and 2011-2019 model years.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor, operating at 12 volts and rated at 5 watts.
The T10 designation refers to the bulb's tubular shape, with the numeric portion indicating a width of 10 millimeters across the envelope.
The W2.1x9.5d base type is a wedge-style connector, meaning the bulb is held in place by tension from the socket rather than by a bayonet or screw mechanism.
At 5 watts, the 12821 is a low-output bulb suited to illumination tasks that require visibility rather than high brightness, such as license plate lighting.
The W2.1x9.5d base specification is a standardized international designation, which means compatible replacement bulbs from other manufacturers sharing that base type are generally interchangeable with the 12821 in this application.