Hyundai Sonata Trunk Bulb Size

Additional Notes

• The Hyundai Sonata trunk bulb specifications reference three bulb sizes across the listed model years: DE3423, DE3175, and DE3022. All three follow the ANSI standard used in the US and Canada, operate at 12V, and belong to the festoon bulb family, which uses end-cap contacts rather than a pin or wedge base.
• The DE3423 is the most frequently specified bulb across the Sonata trunk fitment data, appearing in the 1989-1994, 1999-2010, and 2021-2022 model years. It is a 41mm festoon bulb, making it physically longer than the other two types listed in these specifications.
• The DE3175 and DE3022 are both 31mm festoon bulbs with end-cap contacts and 12V ratings. Despite sharing the same physical length and contact style, they carry different part designations and are not listed as interchangeable within these specifications.
• The DE3175 is specified for the Hyundai Sonata in the 2016-2018 model years, while the DE3022 applies to the 1995-1998 model years. Substituting one 31mm festoon type for the other without confirming fitment compatibility could result in an incorrect installation.
• The 41mm length of the DE3423 means it will not seat correctly in a socket designed for a 31mm festoon bulb. Festoon holders are sized to grip the end caps at a fixed span, so length mismatches between DE3423 and either 31mm type result in a non-functional or unsecured fit.
• All three bulb types in these specifications use end-cap contacts, meaning electrical contact is made at each flat metal end of the bulb rather than through pins or a wedge base. This contact style is standard across the festoon format and is what distinguishes it from other interior bulb types.
• The ANSI designations used here, DE3423, DE3175, and DE3022, are standardized codes that define the bulb's physical and electrical characteristics. The "DE" prefix denotes a dome or festoon-style lamp, and the numerical portion encodes length and other attributes recognized across manufacturers.