The Audi 80 high beam and low beam headlight bulbs both utilize a 9004 bulb size. The replacement chart covers vehicle production spanning 1988 to 1992.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Audi 80 uses the 9004 bulb for both high beam and low beam headlights across the 1988-1992 model years.
The 9004 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments to serve both high and low beam functions within one housing.
The 9004 operates at 12 volts and draws 65 watts on the high beam filament and 45 watts on the low beam filament.
The 9004 uses a P29t base, which is a specific bayonet-style connector that determines physical fitment into the headlight socket.
The 9004 is an ANSI-standardized bulb type recognized in the United States and Canada, meaning it conforms to a defined set of electrical and physical standards within those markets.
Because the Audi 80 (1988-1992) uses the same 9004 bulb for both beam functions, the high and low beam positions are not served by separate, independent bulb types.
Any replacement bulb for this vehicle must carry the P29t base designation, as substituting a bulb with a different base type will not seat correctly in the headlight socket.