Hyundai Santa Fe Dome Light Bulb Size

Additional Notes

• Three festoon bulb types appear across the Hyundai Santa Fe dome light specifications: the DE3425 (41mm), the DE3175 (31mm), and the 6461 (36mm). All three operate at 12V and follow ANSI standards applicable in the US and Canada.
• The DE3175 and DE3425 are both festoon bulbs with end-cap contacts, meaning electrical contact is made at each flat end of the bulb. The 6461 festoon uses an SV8.5 base instead, which is a bayonet-style fitting that is not interchangeable with end-cap festoon sockets despite the bulbs sharing a similar cylindrical form.
• The 6461 bulb carries an explicit 5W rating, while the DE3175 and DE3425 do not specify wattage in the provided data. The 6461 was the dome light bulb for the Santa Fe from 2001 through 2012.
• The 2001 Hyundai Santa Fe used a 904 bulb, designated as a front dome application. The 904 is a T10 miniature wedge bulb rated at 12V and 8W, a physically and electrically distinct type from the festoon bulbs used in all subsequent model years.
• For the 2019-2020 Santa Fe, the DE3425 fitment is conditional, applying only to vehicles equipped with halogen capsule headlamps. This headlamp-based trim distinction directly affects dome bulb compatibility within the same model year.
• The DE3175 (31mm) and DE3425 (41mm) differ by 10mm in length. Because festoon bulbs must physically span the socket contacts, substituting one for the other would result in an improper fit regardless of the shared end-cap contact design.
• The Santa Fe transitioned from the 6461 to the DE3175 between the 2012 and 2013 model years, representing a change in both base type and bulb length for the dome light position.
• The 2022-2023 model years show a split between DE3175 and DE3425 fitments, indicating that the dome light socket specification changed between those two consecutive years.