Toyota 86 Dome Light Bulb Size

The Toyota 86 dome light uses a DE3175 bulb size for interior illumination. The replacement chart covers 2017 to 2020 model years 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 Type	Shop
2017-2020	DE3175	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175	Check Price

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Additional Notes

The Toyota 86 uses the DE3175 bulb for the dome light across the 2017-2020 model years.
The DE3175 is a festoon-type 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 has a 31mm length, which is the span between its two end-cap contacts and determines physical fitment within the dome light housing.
The bulb operates at 12 volts, consistent with standard automotive electrical systems.
The DE3175 designation follows ANSI standards as recognized in the United States and Canada, indicating a defined and regulated specification for the bulb's electrical and physical characteristics.