Audi Q7 License Plate Bulb Size

The Audi Q7 license plate light requires a DE3423 bulb size for proper installation and function. Available data covers the specific range from 2007 to 2015 for the mentioned 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
2007-2015	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 Audi Q7 uses the DE3423 bulb for its license plate lighting across all listed model years, spanning 2007-2015.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape with metal end-cap contacts at each end rather than a base or pin configuration.
Festoon bulbs seat by pressing lengthwise into spring-loaded clips within the lamp housing, with the end caps making electrical contact at both terminals.
The DE3423 has a rated length of 41mm, which is the physical span between the two end caps and must match the housing clip spacing for proper fitment.
The bulb operates on a 12-volt circuit, consistent with standard automotive electrical systems.
The DE3423 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary one.
Because festoon bulbs are available in multiple lengths, substituting a bulb of a different length, such as a 36mm or 44mm unit, would result in poor contact or failure to seat correctly in the Audi Q7 (2007-2015) license plate housing.
The single bulb size applying uniformly across all nine listed model years indicates no mid-generation change to the license plate lamp housing specification during that production period.