The Audi Cabriolet high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers vehicle production spanning 1994 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments: one rated at 60W for high beam operation and one rated at 55W for low beam operation.
The 9003 operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm collar.
The 9003 is defined under ANSI standards and is the designated specification for both the high beam and low beam headlight positions on the Audi Cabriolet across the 1994-1998 model years.
Because the 9003 serves both the high beam and low beam functions in a single bulb, the Audi Cabriolet uses a single-bulb headlight system rather than separate bulbs for each function.
The 9003 is functionally equivalent to the H4 bulb used in international markets, though the two designations reflect different certification standards. The H4 is governed by ECE regulations, while the 9003 falls under ANSI standards applicable in the United States and Canada.
Despite the functional similarity between the 9003 and H4, the two are not always interchangeable without modification, as base tolerances and certification requirements can differ depending on the application and regional regulations.