Ferrari 599 GTB License Plate Bulb Size

The Ferrari 599 GTB license plate light requires a bulb size of 12821 for the rear exterior lighting assembly. Data for the specified vehicle covers the range from 2007 through 2010.

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
2007-2010	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 599 GTB uses the 12821 bulb for its license plate lighting across the 2007-2010 model years.
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 applications.
The T10 designation refers to the bulb's tubular shape, with the number indicating its width in tenths of an inch, making it a compact unit suited to low-profile housings such as license plate lamp assemblies.
The base type on this bulb is W2.1x9.5d, a wedge-style base that relies on tension from the socket rather than a bayonet or screw mechanism to maintain contact.
The bulb operates at 12 volts and draws 5 watts, which is consistent with standard low-current auxiliary lamp circuits found in passenger vehicles.
The W2.1x9.5d base is not interchangeable with bayonet or festoon bases, so fitment depends on the socket type present in the 599 GTB's license plate housing.