Audi Fox License Plate Bulb Size

The Audi Fox license plate light requires a bulb size of 1816 for proper illumination. Data for the specified component covers the period from 1973 through 1979.

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
1973-1979	1816

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816

Other Locations

Additional Notes

The Audi Fox uses the 1816 bulb across all listed model years, spanning 1973-1979.
The 1816 is an ANSI-standardized bulb, meaning its specifications are governed by a recognized North American standard shared across the United States and Canada.
The 1816 bulb follows the T3.25 designation, which refers to a tubular miniature wedge form factor measuring 3.25 eighths of an inch in width.
A wedge-base bulb relies on its glass envelope and wire leads to form the electrical connection, rather than a separate metal base, which is a common trait in low-wattage automotive lighting applications.
The 1816 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of that era.
At 4 watts, the 1816 draws minimal current, which is typical for license plate illumination where output requirements are low.
The uninterrupted use of the 1816 across the entire 1973-1979 production span of the Audi Fox indicates no changes were made to the license plate lighting socket or circuit during that period.