Toyota Previa License Plate Bulb Size

The Toyota Previa license plate light uses 168 and 194 bulb sizes according to the provided specifications. Data for the bulb sizes covers the range from 1991 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
1993-1997	168
1991-1992	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

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Additional Notes

The Toyota Previa uses two distinct bulb sizes for the license plate position across its 1991-1997 model years: the 168 and the 194.
Both the 168 and 194 are ANSI-standardized miniature wedge bulbs sharing the same T10 base and 12-volt operating voltage, which gives them an identical physical form factor.
Despite sharing the T10 base, the 168 and 194 differ in wattage. The 168 draws 4.9 watts, while the 194 draws 3.78 watts, making them electrically distinct and not directly interchangeable without consideration of the wattage difference.
The 1993-1997 Toyota Previa specifies the 168 bulb for the license plate position.
The 1991-1992 Previa specifies the 194 bulb for the same position, representing a different electrical requirement from the later model years.
Because both bulbs share the T10 wedge base, a 194 bulb will physically fit a 168 socket and vice versa, but the wattage difference means the substitution may affect circuit load and light output.
The T10 wedge base is a common automotive base type in which the bulb is held in place by the tension of the socket contacts rather than by a bayonet or screw mechanism.