Mazda CX-9 License Plate Bulb Size

The Mazda CX-9 license plate light requires a 12961 bulb size for proper installation and function within the rear exterior lighting assembly. Available data covers the production span from 2007 through 2017 for the specified vehicle and component.

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
2007-2017	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 CX-9 uses the 12961 bulb for the license plate position across all listed model years, spanning 2007-2017.
The 12961 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.
The T10 designation refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters across the envelope.
The 12961 uses a W2.1x9.5d wedge base, a baseless design where the glass envelope itself forms the retention mechanism by wedging directly into the socket.
The W2.1x9.5d base specification is standardized, meaning the socket interface is shared across many vehicles and bulb products that conform to this base type.
The bulb operates at 12 volts and 5 watts, which is the standard electrical rating for low-current auxiliary positions such as license plate illumination.
The consistent use of the 12961 across all eleven listed model years of the CX-9 indicates a stable socket specification with no fitment variation between those years.
Because the W2.1x9.5d base is a common industry standard, aftermarket and OEM-equivalent T10 bulbs from manufacturers other than Philips are generally produced to the same base specification, provided they match the 12V and 5W ratings.