Audi Q5 License Plate Bulb Size

The Audi Q5 license plate light uses a DE3423 bulb size for the rear exterior illumination system. Data for the specific component covers the period from 2009 to 2012.

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
2009-2012	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 DE3423 is the sole bulb type listed across all four model years of the Audi Q5 covered by these specifications, spanning 2009-2012.
The DE3423 follows the ANSI standard, which is the recognized bulb classification system used in the United States and Canada.
It is a festoon-type bulb, a form factor characterized by a cylindrical body with metal end-cap contacts at both ends rather than a base socket.
The bulb measures 41mm in length, which is the critical fitment factor for festoon bulbs, as the end caps must bridge the contact points within the housing.
The DE3423 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Because the Audi Q5 (2009-2012) uses a festoon bulb with end-cap contacts, substitutions must match both the 41mm length and the end-cap contact style to seat correctly in the license plate housing.