The Mazda MX-6 uses the 9004 bulb for both the high beam and low beam headlight positions across all model years from 1988-1997.
The 9004 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high and low beam functions within one housing.
The 9004 operates on a 12-volt electrical system and carries a wattage rating of 65W on the high beam filament and 45W on the low beam filament.
The 9004 uses a P29t base, which is a specific connector type that physically determines fitment; bulbs with a different base type are not interchangeable with this socket regardless of similar wattage or voltage ratings.
The 9004 is an ANSI-standardized bulb type recognized in both the United States and Canada, meaning it conforms to a defined set of performance and construction specifications established by the American National Standards Institute.
Because the same 9004 bulb serves both beam functions in the Mazda MX-6, replacing only one beam position while leaving an aged bulb in the other socket is a known compatibility consideration, as both filaments age within the same unit.