The Mazda B2300 brake light uses bulb sizes 4157, 3157, and 2458 depending on the specific production period for the vehicle. Data for the lighting components covers the range from 1994 through 2009.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mazda B2300 uses two distinct bulb sizes for its brake lights depending on the model year. The 2006-2009 model years require the 4157 bulb, while the 1994-2005 model years require the 3157 bulb.
Both the 4157 and 3157 are dual-filament wedge bulbs classified under the T25 form factor. Each operates at 12V with a 27W high-filament and 7W low-filament output, conforming to ANSI standards recognized in the US and Canada.
Although the 4157 and 3157 share identical voltage and wattage ratings, they are distinct part numbers and are not confirmed as interchangeable for the Mazda B2300. The specifications assign each to separate year groups without cross-referencing them.
The Center High Mount Stop Light on the Mazda B2300 also follows a year-based split. The 2006-2009 model years use the 922 bulb, while the 1994-2005 model years use the 906 bulb.
The 922 is a single-filament wedge bulb in the T15 form factor, rated at 12V and 16W, and meets ANSI standards for the US and Canadian markets.
The 906 is a miniature single-filament wedge bulb in the T10 form factor, rated at 12V and 8W, also conforming to ANSI standards. Its wattage is notably lower than that of the 922 used in later model years.
The T10 and T15 form factors differ in physical size, which means the 906 and 922 are not interchangeable between the earlier and later B2300 model year groups.
The brake light bulb transition from 3157 to 4157 and the Center High Mount Stop Light transition from 906 to 922 both occur at the same point, between the 2005 and 2006 model years.