Honda Civic Dome Light Bulb Size

The Honda Civic dome light utilizes DE3022 and DE3175 bulb sizes for interior illumination across various production periods. Available information covers a span of time starting from 1973 through 1991.

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
1986-1991	DE3022
1980-1983	DE3022
1978-1979	DE3175
1973-1977	DE3022

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 Honda Civic dome light specifications across model years 1973-1991 reference two bulb sizes: DE3022 and DE3175, both of which are festoon-type bulbs operating at 12 volts.
Festoon bulbs are cylindrical lamps that make electrical contact through metal caps at each end rather than through a base socket, which is reflected in the end-cap contact design shared by both the DE3022 and DE3175.
Both the DE3022 and DE3175 share a 31mm length and are classified under the same ANSI standard applicable to the United States and Canada.
The DE3022 is the dominant fitment across the Honda Civic dome light specifications, covering model years 1973-1977, 1980-1983, and 1986-1991.
The DE3175 applies specifically to the 1978-1979 Honda Civic, representing a two-year deviation from the otherwise consistent DE3022 fitment.
Although the DE3022 and DE3175 share the same physical length and voltage rating, they carry distinct part designations, which indicates a difference in one or more electrical or construction characteristics that affects direct interchangeability.