Mazda MX-5 Miata License Plate Bulb Size

The Mazda MX-5 Miata license plate light requires a 12961 bulb size for proper installation and function within the rear exterior lighting assembly. Available data covers the specific range from 2006 through 2019 for the provided vehicle information.

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
2006-2019	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 Mazda MX-5 Miata uses the 12961 bulb for the license plate position across the 2006-2019 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which refers to a tubular bulb roughly 10mm wide at its widest point.
The bulb operates on a 12-volt electrical system and draws 5 watts, which is typical for low-current interior and exterior accent lighting positions such as license plate illumination.
The base type is W2.1x9.5d, a wedge-style base that relies on tension from the socket rather than a locking pin or bayonet mechanism to hold the bulb in place.
The T10 wedge format is one of the most widely used bulb types in automotive auxiliary lighting, and it is shared across many vehicle makes and models, meaning aftermarket and OEM-equivalent replacements are broadly available in this specification.
Because the 12961 designation is a Philips-specific part number, equivalent bulbs from other manufacturers are typically cross-referenced under the more universal T10 or W5W designation, provided the voltage, wattage, and base type match.
The W2.1x9.5d base specification indicates a wedge base with a 2.1mm wire contact width and a 9.5mm insertion depth, which determines physical socket compatibility and should be matched precisely to avoid fitment issues.