Hyundai Sonata Dome Light Bulb Size

Additional Notes

• The DE3175 is the most frequently specified dome light bulb across the Hyundai Sonata's history, appearing in model years 1989-1998, 2009-2010, 2016-2022, and 2024. It is an ANSI-standard festoon bulb with a 31mm length, end-cap contacts, and a 12V rating.
• Festoon bulbs, including the DE3175, DE3423, and 6461, make contact with the socket through metal caps at each end of the bulb body rather than through a base pin or wedge. This contact style is common in dome and map light applications.
• The 2006-2008 Sonata uses the DE3423, a festoon bulb with a 41mm length and end-cap contacts rated at 12V. The DE3423 is physically longer than the DE3175, making the two types non-interchangeable despite sharing the same contact style.
• The 1999-2001 Sonata uses the 6461, a festoon bulb with a 36mm length and an SV8.5 base, rated at 12V and 5W. The SV8.5 base is a specific festoon socket standard that differs from the open end-cap sockets used by the DE3175 and DE3423, which affects physical fitment.
• The 2023 Sonata is specified with the 904, a miniature wedge bulb of the T10 type rated at 12V and 8W. The wedge format uses a plastic base with wire contacts rather than end-caps, making it a distinct socket type from the festoon bulbs used in surrounding model years.
• For the 2019-2020 Hyundai Sonata, the DE3175 specification is noted specifically for vehicles without a sunroof. A sunroof configuration may involve a different dome light arrangement, and the specification does not cover that variant for those years.
• All four bulb types listed across the Sonata's dome light specifications conform to ANSI standards applicable in the United States and Canada, indicating consistent regulatory compliance across the range of specified bulbs.
• The DE3175 and DE3423 share the same end-cap contact style but differ in body length at 31mm and 41mm respectively. Installing the incorrect festoon length risks poor contact or physical incompatibility with the socket housing.