Honda Odyssey Dome Light Bulb Size

Additional Notes

• The Honda Odyssey dome light draws from two distinct bulb families across its model years: festoon-type bulbs and a miniature wedge-type bulb, each using a different contact and mounting system.
• Festoon bulbs, which account for the majority of fitments in these specifications, are cylindrical lamps that make electrical contact through metal caps at both ends of the tube rather than through a base socket.
• The DE3175 and DE3022 are both 31mm festoon bulbs operating at 12V with end-cap contacts, yet they carry different ANSI designations, which indicates they are not confirmed as interchangeable despite sharing the same length.
• The DE3423 is a 41mm festoon bulb, making it physically longer than the DE3175 and DE3022. This size difference means DE3423 units are not interchangeable with the 31mm festoon types used in other Odyssey model years.
• The Honda Odyssey (1999-2004) uses the DE3423, the longest festoon bulb in these specifications at 41mm, across six consecutive model years.
• For the 2019-2020 model years, the Odyssey uses the 12961, a Philips-designated T10 miniature wedge bulb with a W2.1x9.5d base rated at 12V and 5W. The wedge base design is mechanically incompatible with the end-cap festoon sockets used in all other listed years.
• The DE3175 is the most frequently specified bulb in these records, covering the 2008-2010 and 2021-2024 model years.
• The DE3022 is specified for the 1995-1998 and 2005-2007 model years, representing two separate production periods with the same dome light fitment.
• All festoon bulbs in these specifications operate at 12V, consistent with standard automotive electrical systems.
• Because the Odyssey has used at least four distinct dome light bulb sizes across its model years, year-specific verification is necessary before substituting one bulb size for another.