Audi A7 Dome Light Bulb Size

The Audi A7 dome light requires a 6411 bulb size for proper illumination. The replacement chart covers vehicle production spanning 2012 to 2016.

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
2012-2016	6411

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

The Audi A7 uses the 6411 bulb for the dome light across the 2012-2016 model years.
The 6411 is classified as a festoon bulb, meaning it is cylindrical in shape and mounts by pressing its end caps into spring clips rather than using a screw or bayonet base.
The 6411 bulb has an SV8.5 base designation, which refers to the 8.5mm end cap width standard used to ensure a secure fit within festoon-style holders.
At 36mm in length, the 6411 is a mid-size festoon bulb. Installing a festoon bulb of a different length in a fixed-clip housing will result in a poor or failed connection.
The 6411 operates at 12 volts and 5 watts, which is consistent with low-current interior lighting circuits typical of passenger vehicles.
The 6411 carries an ANSI standard designation, indicating it conforms to a defined specification recognized across the United States and Canada, which supports cross-brand interchangeability among bulbs sharing that designation.