Toyota MR2 Dome Light Bulb Size

The Toyota MR2 dome light requires a DE3175 bulb size for proper installation and illumination within the interior cabin area. Available data for the specified component covers the period from 1985 through 1992.

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
1991-1992	DE3175
1985-1989	DE3175

Bulb Specifications

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

Other Locations

Additional Notes

The DE3175 is the sole dome light bulb size listed for the Toyota MR2 across all model years present in the specifications, spanning 1985-1992.
The DE3175 is a festoon-type bulb, meaning it is cylindrical in form and makes electrical contact through metal caps at each end rather than through a base or pins.
Festoon bulbs are held in place by spring-loaded clips within the dome light housing, with the end caps pressing against the contacts to complete the circuit.
The DE3175 has a nominal length of 31mm, which is the measurement used to distinguish it from other festoon sizes such as the shorter DE3021 or the longer DE3423.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this type.
The DE3175 designation follows ANSI standards applicable in the United States and Canada, indicating the bulb conforms to a defined set of dimensional and performance criteria recognized across those markets.
Because festoon bulbs are sized by length, substituting a festoon bulb of a different length risks poor contact with the housing clips, which can result in intermittent operation or no illumination.