Toyota MR2 Dome Light Bulb Size

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.