Peugeot 404 front and rear turn signal bulbs utilize a P21W size across both positions. The replacement chart covers 1969 to 1970 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The P21W is the sole bulb type listed across all turn signal positions in the Peugeot 404 specifications for 1969-1970.
The P21W operates on a 12-volt electrical system and draws 21 watts, which is the standard wattage for single-filament automotive signalling applications.
This bulb uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d variant.
The P21W is governed by ECE regulations, a framework recognized across Europe and numerous other markets worldwide.
The Peugeot 404 front and rear turn signals share the same P21W specification for both 1969 and 1970, meaning the same bulb type serves all four turn signal positions.
The single-filament construction of the P21W means it is dedicated solely to one lighting function, as opposed to dual-filament bulbs that serve two functions from a single unit.