Isuzu FSR Dome Light Bulb Size

The Isuzu FSR dome light requires a DE3175 bulb size for proper illumination within the interior cabin area. Available information covers the specific time range from 1996 through 2002.

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
1996-2002	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 FSR uses the DE3175 bulb for the dome light across all listed model years, spanning 1996-2002.
All listed entries carry a Tilt Cab designation, indicating the DE3175 fitment applies specifically to that cab configuration.
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 DE3175 has a nominal length of 31mm, which is a standard festoon size widely used in interior lighting applications across various vehicle types.
The bulb operates at 12 volts, consistent with standard automotive electrical systems.
The DE3175 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary part number.
Because the DE3175 is an ANSI-standardized festoon bulb, physically compatible alternatives from different manufacturers may share the same 31mm end-cap format, though fitment should be confirmed against the Tilt Cab specification.