Citroen D21 License Plate Bulb Size

The Citroen D21 license plate light requires a unique bulb size of 97 for proper installation and function. Data for the specified lighting component covers the range from 1969 to 1972.

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
1969-1972	97

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	97

Other Locations

Additional Notes

The Citroen D21 uses the ANSI 97 bulb for its license plate position across the 1969-1972 model years.
The 97 is a single-filament bulb built on a BA15s bayonet base, which features a single locating pin on the base collar to secure the bulb in its socket.
The 97 operates at 12 volts and draws 13 watts, placing it in the low-wattage range typical of auxiliary lighting positions such as license plate illumination.
The 97 is classified as an ANSI standard bulb recognized in the United States and Canada, meaning its physical and electrical specifications conform to a defined North American standardization framework.
The 97 is a variant of the 1156 bulb. While both share the BA15s bayonet base and single-filament construction, the 97 differs in wattage output, making the two types not directly interchangeable in all applications despite their physical similarities.