Kia Soul EV Trunk Bulb Size

The Kia Soul EV trunk bulb uses 2 distinct sizes: DE3175 and 6418, with each bulb size corresponding to specific vehicle configurations. A replacement chart documents bulb specifications across the 2015 to 2019 production range.

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
2019	DE3175 (To 11/12/2018)
2015-2018	6418

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6418

Other Locations

Additional Notes

The 6418 and DE3175 are both festoon-type bulbs, meaning they mount horizontally between two contact points rather than inserting into a socket with a traditional base.
The 6418 bulb measures 36mm in length and uses an SV8.5 base, operating at 12V with a rated output of 5W.
The DE3175 bulb measures 31mm in length and uses end-cap contacts rather than an SV8.5 base, also operating at 12V.
Both bulb types conform to ANSI standards applicable in the United States and Canada.
The 6418 is the trunk bulb size for the Kia Soul EV across the 2015-2018 model years.
The 2019 model year uses the DE3175 for vehicles produced up to November 12, 2018, indicating a mid-production specification change occurred within that model year.
Although both bulbs are festoon types operating at 12V, the 5mm difference in length between the DE3175 and the 6418 makes them physically non-interchangeable in most housings, as festoon bulb fitment is determined by the span between the contact points.
The differing base designs, end-cap contacts on the DE3175 versus the SV8.5 base on the 6418, further distinguish the two bulbs and affect compatibility with the trunk light housing.