Audi SQ5 Dome Light Bulb Size

The Audi SQ5 dome light utilizes a 6411 bulb size for the interior lighting system. Data for the specific component covers the range from 2014 to 2018.

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
2014-2018	6411

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411

Other Locations

Additional Notes

The 6411 is the sole dome light bulb type listed for the Audi SQ5 across the 2014-2018 model years.
The 6411 bulb follows the ANSI standard, which is the recognized specification system used in the United States and Canada for automotive lighting components.
It is a festoon-style bulb, meaning it is cylindrical in shape and mounts by pressing its two end caps into spring-loaded clips rather than using a twist or plug-in socket.
The bulb has a 36mm length, which is a critical fitment factor, as festoon bulbs must match the exact span of the fixture's mounting clips to seat correctly.
The SV8.5 base designation refers to the end cap style used on the bulb, with "SV" indicating a festoon-type cap and "8.5" referring to the cap width in millimeters.
The 6411 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Its rated wattage is 5W, placing it in the low-power range typical of interior courtesy lighting applications.
Because festoon bulbs are sized by length, substituting a bulb of a different length, such as a 31mm or 41mm festoon, would result in an improper fit even if the voltage and wattage ratings matched.