Mazda MX-6 Dome Light Bulb Size

The Mazda MX-6 dome light uses 194 and DE3175 bulb sizes depending on the specific production version of the vehicle. Information provided covers the range from 1988 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
1994-1997	194
1993	DE3175
1992	194
1988-1991	DE3175

Bulb Specifications

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

Other Locations

Additional Notes

The Mazda MX-6 dome light specifications span the 1988-1997 model years, with two distinct bulb types used across that range: the 194 and the DE3175.
The 194 bulb is an ANSI-standard miniature wedge type, classified under the T10 form factor, and operates at 12V with a rated wattage of 3.78W.
The DE3175 is an ANSI-standard festoon bulb with a 31mm length and end-cap contacts, also rated at 12V.
Wedge bulbs like the 194 are retained by friction within a socket, while festoon bulbs like the DE3175 are held under spring tension between two contact points, making the two types physically incompatible with each other's sockets.
The 1992-1997 Mazda MX-6 uses the 194 wedge bulb for the dome light.
The DE3175 festoon bulb is specified for the 1988-1991 model years, with the exception of 1992, and again for 1993.
The 1993 model year uses the DE3175, while the immediately adjacent 1992 and 1994 model years both use the 194, indicating that the socket type changed more than once across the production run.
Because the 194 and DE3175 differ in both physical form and contact type, a bulb from one category cannot serve as a direct replacement for the other without a socket adapter or modification.