Subaru Crosstrek Map Light Bulb Size

Additional Notes

• The DE3175 is the map light bulb size for the Subaru Crosstrek across the 2017-2024 model years covered in these specifications.
• The DE3175 follows the ANSI standard, which is the recognized bulb classification system used in the United States and Canada.
• This bulb belongs to the festoon category, a cylindrical form factor that seats horizontally between two spring-loaded end-cap contacts rather than fitting into a socket.
• The DE3175 has a 31mm length, which is the critical fitment factor for festoon bulbs, as the housing span must match the bulb length for proper contact and retention.
• Operating voltage is rated at 12V, consistent with standard automotive electrical systems.
• The end-cap contact design means the bulb makes electrical contact at both flat ends, distinguishing it from wedge-base or bayonet-base bulb types.
• The DE3175 designation is interchangeable with other 31mm festoon bulbs sharing the same contact type, though voltage and wattage ratings of any replacement should match the original specification.