Honda Accord Dome Light Bulb Size

The Honda Accord dome light utilizes bulb sizes 12961 and DE3175 for interior illumination across various production versions. Available data covers a span of time starting from 1976 through 2021.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2020-2021	12961
1990-1991	DE3175
1982-1985	DE3175
1976-1978	DE3175

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The Honda Accord dome light specifications reference two distinct bulb types: the 12961 and the DE3175, each with different physical formats and contact styles.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. The wedge base design means the bulb is held in place by the socket itself rather than by pins or end caps.
The DE3175 is an ANSI-standard designation recognized across the United States and Canada. It identifies a festoon-style bulb with a 31mm length and end-cap contacts, rated at 12V.
Festoon bulbs, such as the DE3175, make electrical contact through metal caps at each end of the tube, which seats into spring-loaded holders within the dome light housing.
The 12961 wedge bulb and the DE3175 festoon bulb are not interchangeable. Their base types, physical formats, and socket designs are fundamentally different, and substituting one for the other is not possible without modifying the housing.
The Honda Accord (2020-2021) uses the 12961 T10 wedge bulb for the dome light.
The DE3175 festoon bulb is specified for the Honda Accord across model years 1976-1978 and 1982-1985, as well as 1990-1991.
The DE3175 designation follows ANSI standardization, meaning bulbs from multiple manufacturers carrying this designation share the same physical and electrical specifications, allowing cross-brand substitution within that standard.