Kia Soul Dome Light Bulb Size

Additional Notes

• The DE3175 and 6461 are both festoon-type bulbs, meaning they are cylindrical lamps held in place by spring clips at each end rather than inserted into a socket. Despite sharing this form factor, they are not interchangeable, as the DE3175 measures 31mm in length while the 6461 measures 36mm.
• The 6461 bulb carries an SV8.5 base designation, which refers to a specific end-cap contact style with an 8.5mm cap width. The DE3175 and DE3425 use a simpler end-cap contact design without a named base standard, which reflects a different contact interface even though all three are festoon types.
• The Kia Soul dome light shifted from the 6461 bulb to the DE3175 between the 2018 and 2019 model years, representing a change from a 36mm to a 31mm festoon bulb. These two sizes are physically incompatible with each other in the same housing.
• The 904 is a T10 miniature wedge bulb, a form factor entirely distinct from the festoon types used elsewhere in the Soul's dome lighting. At 12V and 8W, it draws more wattage than the 6461's rated 5W, placing it in a different output class.
• The DE3425 is the longest festoon bulb in these specifications at 41mm, used exclusively in the 2023 rear dome light position. It shares the same end-cap contact style as the DE3175 but is not a substitute for it due to the difference in length.
• In the 2023 Soul, the front and rear dome lights take different bulb sizes: the front uses the 904 wedge bulb and the rear uses the DE3425 festoon. This means the two positions within the same model year require entirely different bulb types that share no physical compatibility.
• All four bulb types in these specifications conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical tolerances across the listed sizes.
• The 2022 Soul front and rear dome lights both use the 904 bulb, while the 2023 model uses the 904 only in the front position and the DE3425 in the rear, indicating a rear dome light housing change between those two model years.