Ford Flex License Plate Bulb Size

The Ford Flex license plate light requires a DE3423 bulb size for proper installation and function. Available data covers the specific range from 2009 through 2018 for the 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
2009-2018	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 Ford Flex uses the DE3423 bulb for the license plate position across all listed model years, spanning 2009-2018.
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.
Festoon bulbs are held in place by spring-loaded clips within the housing, which grip the end caps to secure the bulb and maintain the circuit.
The DE3423 has a 41mm length, which is the critical fitment factor for festoon bulbs, as housings are sized to accept a specific length rather than a base type.
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 festoon bulbs are available in multiple lengths, a replacement bulb must match the 41mm length of the DE3423 to seat correctly in the Ford Flex license plate housing.