Nissan D21 Dome Light Bulb Size

The Nissan D21 dome light uses a DE3175 bulb size for interior illumination within the cabin area. Available data for the specified lighting component covers the range from 1989 to 1994.

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
1989-1994	DE3175

Bulb Specifications

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

Other Locations

Additional Notes

The Nissan D21 uses the DE3175 bulb for its dome light across the 1989-1994 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 31mm length in the DE3175 designation refers to the distance between the two end-cap contacts, which is the critical fitment factor for festoon bulbs in a spring-loaded dome light housing.
The DE3175 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles and light trucks of this era.
The DE3175 carries ANSI standardization, meaning its physical and electrical specifications are governed by a recognized industry standard applicable in both the United States and Canada.
Because festoon bulbs are retained by spring tension against their end caps, the 31mm length must be matched precisely for the bulb to seat correctly in the D21 dome light housing.