Isuzu FXR Dome Light Bulb Size

The Isuzu FXR dome light requires a DE3175 bulb size for proper illumination within the interior cabin area of the vehicle. Available data covers the specific range from 2004 through 2011 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
2004-2011	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 DE3175 is the sole dome light bulb size listed for the Isuzu FXR across all model years in the specifications, covering 2004-2011.
All entries in the specifications carry a Tilt Cab body designation, indicating this fitment applies specifically to that cab configuration.
The DE3175 follows the ANSI standard recognized in both the United States and Canada.
It is a festoon-type bulb, meaning it seats horizontally between two end-cap contacts rather than using a bayonet or wedge base.
The bulb has a 31mm length, which is the defining physical attribute of the DE3175 within the festoon bulb family.
The DE3175 operates on a 12-volt electrical system, consistent with standard automotive low-voltage circuits.
Festoon bulbs of differing lengths are not interchangeable, as the end-cap contact spacing is fixed by the socket housing, making the 31mm length a critical fitment factor.