Geo Metro License Plate Bulb Size

The Geo Metro license plate light uses 168 and 67 bulb sizes depending on the specific version of the vehicle. Data for the provided components covers the range from 1989 to 1997.

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
1994-1997	168
1989-1993	67

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67

Other Locations

Additional Notes

The Geo Metro uses two distinct bulb types for its license plate light across its production run: the 168 and the 67, both conforming to ANSI standards recognized in the United States and Canada.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W. Its wedge base design means it is held in place by the socket itself rather than by a locking mechanism such as a bayonet fitting.
The 67 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 8W. The BA15s designation indicates a single-contact bayonet cap with a 15mm base width.
The 67 draws approximately 3.1W more than the 168, meaning the two bulb types are not electrically equivalent and are not interchangeable between the model years that specify each one.
The Geo Metro (1994-1997) uses the 168 bulb for the license plate position, while the 1989-1993 model years use the 67 bulb.
The 67 is described as a lower wattage variant of the 1156 bulb. Both share the BA15s bayonet base, but the 1156 operates at a higher wattage, making the two physically compatible in socket fitment yet electrically different.
The transition from the 67 to the 168 occurred between the 1993 and 1994 model years, representing a change in both base type and wattage for the license plate light position.