Volkswagen Corrado high beam and low beam headlight bulbs both utilize a 9004 bulb size. The replacement chart covers vehicle production spanning 1990 to 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9004 bulb is the sole headlight bulb type specified for the Volkswagen Corrado across all listed model years, covering both high beam and low beam functions for 1990-1994.
The 9004 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 65 watts for high beam output and one rated at 45 watts for low beam output.
Because both the high beam and low beam positions use the same 9004 bulb type, the Corrado's headlight system relies on the bulb's internal filament switching rather than separate bulbs for each function.
The 9004 bulb operates on a 12-volt electrical system, which is standard for passenger vehicles of this type.
The 9004 uses a P29t base, a three-pronged connector that is specific to this bulb family and is not interchangeable with other common base types such as H4 or 9007, despite those bulbs also being dual-filament halogen designs.
The 9004 conforms to ANSI standards and is specified for the US and Canadian markets, indicating the Corrado units covered by these specifications are North American market vehicles.
The 9007 bulb is a frequent point of confusion with the 9004, as both are dual-filament halogen types with a similar appearance, but the high and low beam wattage assignments are reversed between the two, making them electrically incompatible as direct substitutes.