INFINITI M45 Dome Light Bulb Size

Additional Notes

• The INFINITI M45 uses the DE3175 bulb size for the dome light across all listed model years, spanning 2003-2010.
• The DE3175 is classified as a festoon bulb, a type characterized by a cylindrical shape with metal end-cap contacts at each end rather than a traditional base socket.
• Festoon bulbs make contact with the fixture through spring-loaded clips that press against the end caps, which is the standard mounting method for this bulb type in dome light applications.
• The DE3175 has a 31mm length, which is the critical fitment factor when considering any replacement, as festoon bulbs of different lengths are not interchangeable even if they share the same voltage rating.
• The bulb operates at 12 volts, consistent with standard automotive electrical systems.
• The DE3175 designation follows ANSI standards applicable in both the United States and Canada, meaning the specification is consistent across North American market vehicles.
• The "DE" prefix in the DE3175 designation identifies it within the festoon bulb family, distinguishing it from other 31mm festoon variants that may carry different prefix designations and different end-cap configurations.