Kawasaki VN900 Vulcan 900 License Plate Bulb Size

Additional Notes

• The Kawasaki VN900 Vulcan 900 uses the 12821 bulb for the license plate position across all listed model years from 2006-2020, representing a fully consistent fitment throughout the entire production span covered by these specifications.
• The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which refers to the tubular glass envelope with a nominal width of 10 millimeters.
• This bulb uses a W2.1x9.5d base, a wedge-type base where the electrical contacts are formed by the glass envelope itself rather than a separate metal cap, making it a solderless, tool-free replacement in compatible sockets.
• The 12821 operates at 12 volts and 5 watts, placing it in the low-wattage category typical of auxiliary and illumination positions such as license plate lighting on motorcycles.
• The T10 wedge format is widely used across the automotive and motorcycle industries, meaning aftermarket and LED alternatives in the same base type are broadly available, though compatibility with the original socket depends on physical fit and voltage tolerance.
• Because the 12821 designation is a manufacturer-specific Philips part number rather than a universal industry code, equivalent bulbs from other manufacturers must match the W2.1x9.5d base, 12V rating, and 5W output to serve as direct substitutes.