BMW 325i License Plate Bulb Size

The BMW 325i license plate light requires a DE3423 bulb size for proper installation and function. Available data for the specified component covers the range from 1988 through 2006.

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
2001-2006	DE3423
1993-1995	DE3423
1988-1991	DE3423

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

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Additional Notes

The BMW 325i uses the DE3423 bulb size across all specified model years for the license plate position.
The specified model years span 1988-1995 and 2001-2006, with the DE3423 designated for the license plate application throughout.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape and seats between two end-cap contacts rather than using a bayonet or wedge base.
The DE3423 has a length of 41mm, which is a standard festoon size commonly found in European and North American vehicle applications.
The bulb operates at 12 volts, consistent with the standard electrical system voltage used in passenger vehicles.
The DE3423 carries ANSI standardization and is recognized for use in both the United States and Canada, indicating a shared North American fitment standard.
Because the DE3423 is an ANSI-designated part, it is subject to defined performance and dimensional standards, which supports cross-brand interchangeability within that specification.
The end-cap contact design of the DE3423 requires a festoon-compatible socket; substituting a wedge-base or bayonet bulb would not be physically compatible with this mounting type.