The Mazda MX-6 brake component utilizes a 1157 bulb size for the lighting system across all listed vehicle versions. Available information covers a time range from 1988 to 1997.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mazda MX-6 uses the 1157 bulb for brake lights across all model years from 1988-1997, making it the consistent standard for that position throughout the vehicle's entire production run in those years.
The 1157 is a dual-filament bulb, meaning it serves two lighting functions within a single unit. In brake light applications, the higher 21W filament activates under braking while the lower 5W filament handles a secondary function such as running lights.
The 1157 operates on a 12V electrical system and uses a BAY15d bayonet base. The BAY15d base features two pins offset at different heights, a design that prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The 1157 is an ANSI-standardized bulb recognized across the United States and Canada, meaning replacements sourced from any supplier conforming to that standard will share the same electrical and physical specifications.
The center high mount stop light on the MX-6 uses the 921 bulb across all model years from 1988-1997, a different type from the 1157 used in the standard brake light positions.
The 921 is a single-filament wedge-type bulb in the T15 form factor. Unlike the bayonet base of the 1157, the wedge base relies on tension from the socket contacts rather than a locking pin mechanism to hold the bulb in place.
The 921 operates at 12V with a 16W output. As a single-filament bulb, it is dedicated solely to the stop light function rather than combining multiple lighting roles as the 1157 does.
Because the 1157 and 921 use fundamentally different base types, a bayonet versus a wedge, the two bulbs are not interchangeable between the standard brake light positions and the center high mount stop light position on the MX-6.