Ferrari California License Plate Bulb Size

The Ferrari California license plate light requires a 12821 bulb size for proper illumination of the rear registration area. Available data for the specified vehicle covers the period from 2009 through 2014.

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
2009-2014	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 Ferrari California uses the 12821 bulb for the license plate position across all listed model years, spanning 2009-2014.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which is one of the most widely used bulb types in automotive auxiliary lighting positions such as license plate, parking, and side marker applications.
The T10 bulb operates at 12 volts and 5 watts, placing it in the low-wattage category typical of illumination functions that require continuous operation without generating significant heat load.
The base type is W2.1x9.5d, which is a wedge-style base that relies on tension from the socket contacts rather than a bayonet or screw mechanism to maintain the electrical connection.
The W2.1x9.5d designation specifies the contact width and pin spacing of the wedge base, and sockets designed for this base type are not interchangeable with bayonet or festoon-style fittings.
Because the 12821 is a manufacturer-specific part number from Philips, equivalent bulbs from other manufacturers must match the T10 form factor, W2.1x9.5d base, 12V rating, and 5W output to be considered a direct replacement.