Ford Festiva Dome Light Bulb Size

The Ford Festiva dome light utilizes DE3022 and DE3175 bulb sizes depending on the specific version of the vehicle. Data for the lighting components covers the range from 1988 to 1993.

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
1990-1993	DE3022
1988-1989	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3022
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The Ford Festiva dome light uses two distinct bulb sizes across its model years: the DE3022 for 1990-1993 and the DE3175 for 1988-1989.
Both the DE3022 and DE3175 are festoon-type bulbs, meaning they are cylindrical in shape and make electrical contact through metal caps at each end rather than through a base socket.
Both bulbs conform to ANSI standards as recognized in the United States and Canada, indicating a standardized specification for physical and electrical properties.
Both bulbs operate at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Both the DE3022 and DE3175 share a 31mm length and end-cap contact design, making them physically similar in form factor despite carrying different part numbers.
Although the DE3022 and DE3175 share the same length and contact type, they are listed as separate part numbers, which indicates a difference in at least one electrical or mechanical specification such as wattage or contact configuration.
The 1990 Ford Festiva represents the model year in which the dome light bulb specification changed from the DE3175 to the DE3022.
The shared physical format of both bulbs, 31mm festoon with end-cap contacts, is a common fitment in small interior lighting applications across many vehicle makes, though cross-vehicle interchangeability is not indicated by these specifications.