Cadillac SRX License Plate Bulb Size

The Cadillac SRX license plate light requires a bulb with the specific 12961 size for proper installation and function. Available data for the bulb covers the range from 2004 to 2016.

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 Size
2004-2016	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The Cadillac SRX uses the 12961 bulb for the license plate position across all listed model years, spanning 2004-2016.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which refers to the tubular glass envelope with a nominal width of 10 millimeters.
The bulb operates on a 12-volt electrical system and draws 5 watts, which is typical for low-intensity illumination tasks such as license plate lighting.
The base type is W2.1x9.5d, a wedge-style base that relies on the tension of the socket contacts rather than a bayonet or screw mechanism to maintain the electrical connection.
The T10 wedge format is a widely used standard in automotive lighting, meaning the 12961 shares its physical form with a broad range of compatible bulbs from multiple manufacturers beyond Philips.
Because the same bulb size applies to the Cadillac SRX across all thirteen listed model years without variation, there are no year-specific fitment distinctions to account for within this position.