The Mazda B4000 brake light utilizes bulb sizes 4157, 3157, and 2458 depending on the specific version of the vehicle component. Available data for the lighting specifications covers the period 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 B4000 uses two distinct brake bulb types across its production span: the 3157 for model years 1994-2005 and the 4157 for model years 2006-2009.
Both the 3157 and 4157 are ANSI-standard dual-filament wedge bulbs sharing the same T25 form factor and identical electrical ratings of 12V with a 27W/7W output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary lighting function.
Despite their shared physical and electrical characteristics, the 3157 and 4157 are not confirmed as interchangeable for the Mazda B4000, as the specifications assign each to a distinct set of model years.
The center high mount stop light on the Mazda B4000 also follows a two-bulb pattern across its production span, using the 906 for model years 1994-2005 and the 922 for model years 2006-2009.
The 906 is a single-filament miniature wedge bulb in a T10 form factor, rated at 12V and 8W, while the 922 is a single-filament wedge bulb in a T15 form factor, rated at 12V and 16W.
The 906 and 922 differ in both physical form factor and wattage, making them non-interchangeable with one another in the center high mount stop light position.
The transition from 3157 to 4157 in the brake light position and from 906 to 922 in the center high mount stop light position both occur at the same point, between the 2005 and 2006 model years.
All four bulb types specified for the Mazda B4000 conform to ANSI standards applicable in both the United States and Canada.