Honda Crosstour Map Light Bulb Size

The Honda Crosstour map light requires a DE3175 bulb size for proper installation and function within the interior lighting housing. Data for the specified bulb covers the 2012 to 2015 range of production for the vehicle.

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
2012-2015	DE3175

Bulb Specifications

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

Other Locations

Additional Notes

The Honda Crosstour uses the DE3175 bulb for the map light across all listed model years, spanning 2012-2015.
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.
Festoon bulbs are held in place by spring-loaded clips within the housing, with the end caps pressing against the contacts to complete the circuit.
The DE3175 has a nominal length of 31mm, which is the critical fitment factor for festoon bulbs, as the housing clip spacing must match the bulb length.
The bulb operates at 12 volts, consistent with standard automotive electrical systems.
The DE3175 designation follows ANSI standards, meaning it is a regulated specification recognized across the United States and Canada.
Because the DE3175 is an ANSI-standardized part, bulbs from different manufacturers carrying the same designation are expected to share the same physical and electrical specifications, allowing interchangeability within that standard.
Festoon bulbs of differing lengths, such as 28mm or 36mm variants, are not interchangeable with the DE3175 even if they share the same voltage rating, as the physical length determines whether the bulb seats correctly in the housing.