The Mazda B1600 front side marker uses a 67 bulb size while the rear side marker requires a 1157 bulb size. The replacement chart covers vehicle production spanning 1975 to 1976.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mazda B1600 uses two distinct bulb types across its side marker positions for the 1975-1976 model years: the 67 at the front and the 1157 at the rear.
The 67 is an ANSI-standard single-filament bulb rated at 12V and 8W, fitted with a BA15s bayonet base.
The BA15s base is a single-contact bayonet mount, meaning it is not interchangeable with dual-contact bayonet bases used in other bulb types.
The 67 is a lower-wattage variant of the 1156, sharing the same BA15s base but drawing significantly less power at 8W compared to the 1156's higher output.
The 1157 is an ANSI-standard dual-filament bulb rated at 12V with a 21W/5W output, fitted with a BAY15d bayonet base.
The BAY15d base features offset pins that prevent incorrect insertion, and it is not compatible with the BA15s base used by the 67 bulb.
The dual-filament design of the 1157 allows it to serve two brightness levels within a single housing, which suits rear marker applications that may require both running and signaling functions.
Both the 67 and 1157 conform to ANSI standards applicable in the United States and Canada, indicating standardized sizing and electrical ratings within those markets.