Porsche Boxster License Plate Bulb Size

The Porsche Boxster license plate light requires a DE3423 bulb size for proper installation and function within the rear exterior lighting assembly. Provided data covers the production range from 1997 through 2012 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
1997-2012	DE3423	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423	Check Price

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Additional Notes

The DE3423 is the sole license plate bulb size specified for the Porsche Boxster across all listed model years from 1997 to 2012.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in form and makes electrical contact through metal caps at each end rather than through a base socket.
The DE3423 has a length of 41mm, which is the critical physical constraint governing fitment within the license plate lamp housing.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
The DE3423 carries an ANSI designation, indicating it conforms to a standardized specification recognized in both the United States and Canada.
Because the DE3423 is an ANSI-standardized festoon bulb, other manufacturers' bulbs sharing the same designation and 41mm length are generally considered interchangeable, provided the end-cap contact configuration matches.
Festoon bulbs of differing lengths, such as the 36mm DE3175 or the 44mm DE3175 variants, are not compatible substitutes despite sharing a similar form factor, as the length must correspond precisely to the housing span.