Toyota 4Runner Trunk Bulb Size

Additional Notes

• The Toyota 4Runner uses the DE3175 bulb size for the trunk across all specified model years from 1995 to 2024.
• 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 fixture, which grip the end caps to secure the bulb and complete the circuit.
• The DE3175 operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles.
• The "31mm" designation in the DE3175 refers to the length of the bulb, which is the critical fitment factor for festoon bulbs when selecting a replacement.
• The DE3175 conforms to ANSI standards applicable in the United States and Canada, indicating it meets defined performance and dimensional criteria for those markets.
• The uniform fitment of the DE3175 across the 1995-2024 Toyota 4Runner means a single bulb specification covers the trunk position for all listed model years without variation.
• Festoon bulbs share a common form factor across several size designations, so confirming the 31mm length is necessary to avoid installing an incompatible festoon bulb of a different size, such as the 28mm DE3021 or the 36mm DE3022.