Honda Odyssey Map Light Bulb Size

Additional Notes

• The Honda Odyssey map light draws from three distinct bulb types across its model history: the 12961, the DE3175, and the DE3022.
• The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. Its wedge base means the bulb is held in place by tension from the socket rather than by a separate locking mechanism.
• The DE3175 and DE3022 are both ANSI-standard festoon bulbs with a 31mm length and end-cap contacts, operating at 12V. Festoon bulbs seat horizontally between two spring-loaded contacts at each end of the housing.
• The Honda Odyssey (2014-2024) uses the 12961 wedge bulb for the map light position.
• Model years 2008-2013 use the DE3175 festoon bulb, which shares its 31mm length and end-cap contact design with the DE3022 but carries a different ANSI designation.
• The DE3022 and DE3175 share the same physical 31mm festoon format and 12V rating, yet they carry separate ANSI designations, which indicates they are not confirmed as interchangeable by the specifications.
• The 2005-2007 Odyssey uses the DE3022 festoon bulb, as do the 1995-1998 model years.
• The 12961 wedge type also appears in the 1999-2004 model years, making it the bulb type with the broadest overall presence across the Odyssey's model history in these specifications.
• A fitment shift from the DE3175 festoon to the 12961 wedge occurred between the 2013 and 2014 model years, meaning the two bulb types are not interchangeable due to their fundamentally different base designs.
• The wedge base of the 12961 is physically incompatible with the spring end-cap socket used by DE3175 and DE3022 festoon bulbs, so substitution across these two formats is not supported by the socket design.