Renault R12 front and rear side marker bulbs utilize an 89 size bulb configuration throughout the vehicle's lighting system. The replacement chart covers 1973 to 1977 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Renault R12 uses the 89 bulb for both front and rear side marker positions across the 1973-1977 model years.
The 89 is an ANSI-standard bulb recognized in the US and Canadian markets, operating at 12 volts and 13 watts.
The 89 bulb uses a BA15s bayonet base, which is a single-contact base design that seats with a twist-lock motion into a compatible socket.
The single-filament construction of the 89 bulb means it serves one lighting function only, with no secondary filament for dual-intensity operation.
The 89 is a lower wattage variant of the 1156 bulb, sharing the same BA15s base type but drawing less power at 13W compared to the 1156's 26.9W rating.
Because the 89 and 1156 share the same BA15s base, physical fitment into the socket is possible with either bulb, though the wattage difference makes them non-equivalent replacements for this application.
The uniform use of the 89 bulb across both the front and rear side marker positions on the Renault R12 means a single bulb type serves all four side marker sockets on the vehicle.