BMW X3 License Plate Bulb Size

The BMW X3 license plate light requires a bulb with the specific size DE3423 for proper installation and function. Provided information covers the span of time from 2004 through 2016 for the listed vehicle.

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
2004-2016	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 BMW X3 uses the DE3423 bulb for the license plate position across all listed model years, spanning 2004-2016.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket or pins.
The DE3423 operates at 12 volts, which is consistent with standard 12V automotive electrical systems.
The DE3423 has a 41mm length, which is the critical fitment factor for festoon bulbs, as the end-cap contacts must bridge the mounting clips at a fixed span inside the license plate housing.
The DE3423 carries ANSI designation, indicating it conforms to a standardized specification recognized in the United States and Canada.
Because the DE3423 is an ANSI-standardized festoon bulb, other festoon bulbs sharing the same 41mm length and 12V rating may be physically interchangeable, though the DE3423 designation specifically confirms compliance with the ANSI standard for this application.
Festoon bulbs of differing lengths, such as 36mm or 44mm variants, are not interchangeable with the DE3423, as the end-cap contacts would not seat correctly within a housing designed for a 41mm span.