Audi RS5 Dome Light Bulb Size

Additional Notes

• The 6411 is the dome light bulb size for the Audi RS5 across the 2013-2015 model years.
• The 6411 bulb follows the ANSI standard, which is the recognized specification system used in the United States and Canada for automotive and general lighting applications.
• The 6411 is a festoon-type bulb, a cylindrical form factor that mounts by pressing its end caps into spring clips on either side of a housing, rather than using a socket.
• The bulb measures 36mm in length, which is a critical fitment factor, as festoon bulbs must match the exact span of the mounting clips in the fixture.
• The 6411 uses an SV8.5 base, a designation that refers to the end cap style and width of the festoon bulb, which must correspond to the clip width of the dome light housing.
• The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
• The 6411 carries a 5-watt rating, placing it in the low-wattage range typical of interior courtesy and dome lighting applications.
• When sourcing a replacement, the 36mm length and SV8.5 base must both match, as festoon bulbs with different lengths or base widths are not interchangeable even if the wattage is identical.