The Mazda B2500 brake light requires bulb size 3157 or 2458 depending on the specific version of the vehicle. Data for the provided components covers the range from 1998 to 2001.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mazda B2500 uses the 3157 bulb for brake lights across the 1998-2001 model years.
The 3157 is a dual-filament bulb, meaning it serves two brightness levels within a single unit, typically supporting both running light and brake light functions through separate filaments rated at 7W and 27W respectively.
The 3157 follows the T25 wedge form factor, which refers to the shape of the plastic base that secures the bulb into its socket without a separate metal cap or bayonet fitting.
The center high mount stop light on the B2500 uses the 906 bulb across the same 1998-2001 model years.
The 906 is a single-filament miniature wedge bulb in the T10 form factor, operating at 12V and 8W, making it significantly lower in wattage than the 3157 used in the main brake light positions.
Both the 3157 and 906 conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications across those markets.
The 3157 and 906 are not interchangeable. The T25 and T10 designations reflect different physical base sizes, and their wattage and filament configurations are distinct from one another.
The dual-filament design of the 3157 requires that the socket wiring supports two separate circuits. Installing a single-filament substitute in a 3157 socket would result in the loss of one lighting function.