Saturn L300 License Plate Bulb Size

The Saturn L300 license plate light requires a 12961 bulb size for proper illumination on the rear of the vehicle. Data for the bulb specifications covers the range from 2001 to 2005.

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
2001-2005	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 Saturn L300 uses the 12961 bulb for the license plate position across all listed model years, spanning 2001-2005.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, operating at 12 volts and 5 watts.
The T10 designation refers to a tubular bulb with a width of approximately 10 millimeters, a common sizing standard in automotive lighting applications.
The base type is W2.1x9.5d, which is a wedge-style base without metal pins, relying on the tension of the socket contacts to hold the bulb in place.
At 5 watts, the 12961 is a low-draw bulb, consistent with the minimal illumination requirements of a license plate light position.
The W2.1x9.5d base specification is a critical fitment detail, as T10 bulbs with differing base configurations are not interchangeable even when the glass envelope appears similar in size.
The 12V operating voltage aligns with the standard electrical system voltage found in conventional passenger vehicles, making the 12961 compatible with the L300's electrical architecture.