Mazda 323 Dome Light Bulb Size

The Mazda 323 dome light uses bulb size DE3175 and bulb size 194 for interior illumination. Available data for the specified components covers the range from 1986 through 1994.

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
1993-1994	DE3175
1992	194
1986-1991	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The DE3175 is the dominant dome light bulb type across the Mazda 323 model years covered in these specifications, appearing in eight of the nine listed years.
The DE3175 is a festoon-style bulb measuring 31mm in length, making contact through metal end-caps at each end rather than through a wedge base.
Festoon bulbs seat into spring-loaded clips within the dome light housing, a mounting method that is physically incompatible with wedge-base bulbs.
The Mazda 323 (1986-1991 and 1993-1994) uses the DE3175 bulb, which operates at 12 volts and conforms to ANSI standards applicable in the United States and Canada.
The 1992 Mazda 323 departs from the DE3175 specification, instead using the 194 bulb for the dome light.
The 194 is a T10 miniature wedge bulb, rated at 12 volts and 3.78 watts, with a plastic wedge base that differs structurally from the end-cap contacts of the DE3175.
Because the DE3175 and 194 use fundamentally different base types, the two bulbs are not interchangeable despite both operating at 12 volts.
The 194 bulb also conforms to ANSI standards for the United States and Canada, placing it in the same regulatory framework as the DE3175.