Moto Guzzi Stelvio 1200 License Plate Bulb Size

Additional Notes

• The Moto Guzzi Stelvio 1200 uses the 12961 bulb for its license plate light across all listed model years from 2009-2018.
• The 12961 is a Philips part number designating a T10 miniature wedge bulb, one of the most widely used bulb types in automotive and motorcycle lighting applications.
• The T10 designation refers to the bulb's tubular form factor, which is a standard sizing classification in miniature lighting.
• The 12961 operates at 12 volts and 5 watts, a rating typical of low-load indicator and auxiliary lighting positions such as license plate illumination.
• The bulb uses a W2.1x9.5d base, which is the wedge-type base standard for T10 bulbs, where the electrical contacts are integrated directly into the glass envelope rather than a separate metal cap.
• The W2.1x9.5d base specification defines the physical fitment interface, meaning only bulbs sharing this base type are mechanically compatible with the Stelvio 1200's license plate housing.
• The 12961 designation is specific to Philips, though the underlying T10 W2.1x9.5d 12V 5W specification is a cross-manufacturer standard, allowing equivalent bulbs from other manufacturers to serve as replacements provided they match all three parameters: voltage, wattage, and base type.
• The consistent use of a single bulb specification across all listed model years indicates no change was made to the license plate light assembly design throughout the production run covered by these specifications.