Nissan 310 Dome Light Bulb Size

The Nissan 310 dome light requires a DE3175 bulb size for interior illumination. Replacement bulb specifications in the chart span 1979 to 1982 model years.

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
1979-1982	DE3175

Bulb Specifications

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

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Additional Notes

The DE3175 is the sole dome light bulb size listed for the Nissan 310 across all documented model years, spanning 1979-1982.
The DE3175 follows the ANSI standard, meaning it conforms to the specifications set by the American National Standards Institute, which governs bulb dimensions and electrical ratings for the US and Canadian markets.
The DE3175 is a festoon-type bulb, a form factor characterized by a cylindrical body held between two end-cap contacts rather than a screw or bayonet base.
The bulb body is 31mm in length, which is the figure used to match festoon bulbs to their housing slots, as the contacts must bridge the fixed distance between the two mounting points inside the dome light fixture.
The DE3175 operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles.
End-cap contacts on the DE3175 mean the electrical connection is made at both flat ends of the bulb, a design that requires the replacement bulb to match the same 31mm span to seat correctly in the fixture.
Because festoon bulbs rely on physical length for proper contact rather than a locking base, substituting a festoon bulb of a different length in the Nissan 310 dome light housing would result in a poor or failed connection.