Tesla Roadster License Plate Bulb Size

The Tesla Roadster license plate light requires a DE3423 bulb size for proper installation on the vehicle. Data for the specified component covers the period from 2008 through 2011.

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
2008-2011	DE3423	Check Price

Bulb Specifications

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

Other Locations

Additional Notes

The Tesla Roadster uses the DE3423 bulb for its license plate lighting across the 2008-2011 model years.
The DE3423 is classified as a festoon bulb, a cylindrical form factor held in place by spring-loaded end-cap contacts rather than a screw base or bayonet fitting.
At 41mm in length, the DE3423 falls within the mid-range of common festoon sizes, which typically span from 28mm to 44mm. Substituting an incorrect festoon length risks poor contact or physical incompatibility with the housing.
The DE3423 operates at 12 volts, consistent with standard automotive electrical systems.
The DE3423 carries ANSI designation, meaning it conforms to standardized specifications recognized in both the United States and Canada. This designation provides a basis for cross-referencing equivalent bulbs from different manufacturers.
Because festoon bulbs of similar appearance can vary in length, a replacement bulb must match the 41mm specification of the DE3423 to seat correctly in the Tesla Roadster's license plate lamp housing.