Mazda 808 Back Up Light Bulb Size

The Mazda 808 back up light utilizes P21W and 1156 bulb sizes for the rear illumination system. Data for the specific components covers the period from 1972 through 1977.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1972-1977	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The 1156 is the sole bulb type listed across all model years of the Mazda 808 covered by these back up light specifications, spanning 1972-1977.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail duties, into a single unit.
The 1156 operates at 12 volts and 21 watts, which places it within the standard low-voltage automotive electrical range common to 12V vehicle systems.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single central contact pin at the base, distinguishing it from the dual-contact BA15d variant.
The 1156 carries ANSI standardization applicable to the United States and Canada, indicating the bulb conforms to a defined set of dimensional and electrical tolerances recognized across North American markets.
Because the BA15s base is a single-contact design, substituting a BA15d-based bulb, such as the 1157, would result in an incompatible fit despite the physical similarity of the bayonet housing.