Honda Insight Map Light Bulb Size

The Honda Insight map light utilizes 12961 and DE3175 bulb sizes depending on the specific version of the vehicle. Available data for the lighting components covers the range from 2000 through 2022.

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
2021-2022	12961
2019-2020	DE3175
2010-2014	DE3175
2000-2006	12961

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 DE3175 is an ANSI-designated festoon bulb with a 31mm length and end-cap contacts operating at 12V. Festoon bulbs make contact at both flat ends rather than through a base socket, which distinguishes them physically from wedge-type bulbs.
The 12961 is a Philips part number for a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. The W2.1x9.5d designation describes the wedge base width and pin spacing according to IEC standards.
The Honda Insight uses two distinct map light bulb types across its production years: the 12961 (T10 wedge) and the DE3175 (31mm festoon). These two bulb formats are not interchangeable due to their different base types and physical configurations.
Model years 2010-2014 and 2019-2020 of the Honda Insight specify the DE3175 festoon bulb for the map light position.
Model years 2000-2006 and 2021-2022 specify the 12961 T10 wedge bulb for the same map light position.
The shift from DE3175 to 12961 between the 2020 and 2021 model years reflects a change in the map light socket type, meaning parts sourced for the third-generation Insight are not directly applicable to the fourth-generation without confirming the specific year.