Mazda CX-5 Dome Light Bulb Size

The Mazda CX-5 dome light uses a DE3175 bulb size for interior illumination across multiple model generations. The replacement chart covers vehicle production spanning from 2013 to 2023 with corresponding bulb specifications.

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
2021-2023	DE3175
2019-2020	DE3175 (Without LED Tail Lights)
2013-2018	DE3175

Bulb Specifications

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

Other Locations

Additional Notes

The Mazda CX-5 uses the DE3175 bulb size across all listed model years from 2013 to 2023 for the dome light position.
The DE3175 is a festoon-style bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
The DE3175 operates at 12 volts, which is standard for automotive interior lighting applications.
The bulb has a 31mm length, which is the span between its two end-cap contacts and determines physical fitment within the dome light housing.
The DE3175 designation follows ANSI standards applicable in the United States and Canada, indicating a standardized specification for voltage, size, and contact type.
For the 2019 and 2020 Mazda CX-5, the DE3175 fitment applies specifically to vehicles without LED tail lights, indicating that trim level or factory lighting configuration affects dome light bulb compatibility.
Because the DE3175 is an ANSI-standardized festoon bulb, aftermarket and OEM replacements from different manufacturers are generally interchangeable as long as the 31mm length and end-cap contact type are matched.