Fiat 500X License Plate Bulb Size

The Fiat 500X license plate light requires a 12961 bulb size for proper illumination of the rear registration area. Data for the specific component covers the period from 2016 through 2023.

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
2016-2023	12961	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price

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Additional Notes

The Fiat 500X uses the 12961 bulb for its license plate lighting across all listed model years, spanning 2016-2023.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to the bulb's tubular shape, with the number indicating a width of 10 thirty-seconds of an inch, making it one of the smallest wedge-type bulbs used in automotive applications.
The 12961 uses a W2.1x9.5d base, which is the standard wedge base type for T10 bulbs, relying on the tension of the socket contacts rather than a bayonet or screw mechanism for retention.
The bulb operates at 12 volts and draws 5 watts, consistent with low-current auxiliary lighting circuits such as license plate illumination.
The T10 W2.1x9.5d base is a widely standardized fitment, meaning aftermarket and OEM-equivalent replacements from manufacturers other than Philips are generally produced to the same base specification.
Because the 12961 designation is Philips-specific, equivalent bulbs from other manufacturers are typically cross-referenced by the T10 form factor and W2.1x9.5d base rather than by this part number alone.