Sterling 825 Dome Light Bulb Size

The Sterling 825 dome light requires a DE3175 bulb size for proper installation within the interior overhead housing. Data for the specific component covers the range from 1987 to 1988.

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
1987-1988	DE3175

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 bulb type listed for the Sterling 825 dome light across both documented model years, 1987-1988.
The DE3175 follows the ANSI standard, meaning it conforms to the electrical and physical specifications recognized across the United States and Canada.
As a festoon-type bulb, the DE3175 seats by pressing its end-cap contacts against spring-loaded holders at each end of the housing, rather than using a twist or bayonet base.
The DE3175 has a 31mm length, which is the critical fitment factor when substituting or cross-referencing festoon bulbs, as festoon holders are length-specific.
The bulb operates at 12 volts, consistent with standard automotive electrical systems.
Because festoon bulbs of different lengths share similar end-cap contact designs, a bulb of incorrect length may fit loosely or fail to make contact, making the 31mm specification a firm compatibility requirement for the Sterling 825 dome application.