Isuzu NQR Dome Light Bulb Size

The Isuzu NQR dome light utilizes a DE3175 bulb size for illumination within the interior cabin area of the vehicle. Available data covers the range of 1996 through 2013 for the specified lighting component.

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
1996-2013	DE3175 (Tilt Cab)

Bulb Specifications

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

Other Locations

Additional Notes

The Isuzu NQR dome light bulb size is DE3175 across all listed model years, spanning 1996-2013.
The DE3175 designation follows ANSI standards, meaning it conforms to a defined North American specification recognized in both the United States and Canada.
The DE3175 is a festoon-type bulb, which refers to a cylindrical form factor that mounts horizontally between two spring-clip contacts rather than inserting into a socket.
The bulb has a 31mm length, which is the defining physical characteristic that determines fitment within the dome light housing.
Electrical contact is made through end-cap contacts at both terminals, a design typical of festoon bulbs where each flat metal cap at either end completes the circuit.
The DE3175 operates at 12 volts, consistent with the standard electrical system voltage found in commercial trucks of this type.
The Tilt Cab body configuration is specified for all listed years, meaning the DE3175 fitment applies exclusively to that cab style within the NQR lineup as documented.
The uninterrupted use of the DE3175 across 18 consecutive model years indicates a stable dome light housing design throughout the NQR's production run in this period.