Plymouth Reliant License Plate Bulb Size

The Plymouth Reliant license plate light requires a 168 bulb size for proper illumination of the rear registration area. Data for the specified component covers the range from 1981 to 1989.

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
1981-1989	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Plymouth Reliant uses the 168 bulb for the license plate position across all listed model years, spanning 1981-1989.
The 168 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
It operates at 12 volts and 4.9 watts, which places it in the low-wattage range typical of illumination bulbs rather than signaling bulbs.
The 168 follows a T10 form factor, a miniature wedge-base design that seats by friction rather than by a bayonet or screw mechanism.
The wedge-base construction of the T10 means the bulb is held in place by the socket walls compressing against the glass envelope's flattened base, with no separate metal cap.
Because the 168 is an ANSI-standardized type, it is produced by multiple manufacturers and is widely available as a direct-fit replacement for the Plymouth Reliant license plate socket.
The T10 wedge format is shared by several bulb numbers with differing wattages, so wattage confirmation is relevant when substituting within the same physical form factor.