Honda Accord Interior Door Bulb Size

The Honda Accord interior door light requires bulb size 194 or DE3021 depending on the specific application. Data for the provided components covers the span from 1990 to 2020.

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
2018-2020	194
1990-1991	DE3021

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3021

Other Locations

Additional Notes

The 194 bulb is an ANSI-standardized miniature wedge type, classified under the T10 form factor, and operates at 12 volts with a power draw of 3.78 watts.
The DE3021 is an ANSI-standardized festoon bulb with a 31mm length and end-cap contacts, also rated at 12 volts.
Wedge bulbs like the 194 use a pinched glass base that seats directly into a socket without a separate holder, while festoon bulbs like the DE3021 are held in place by spring clips at each end.
The Honda Accord (2018-2020) uses the 194 bulb for the interior door position.
The Honda Accord (1990-1991) uses the DE3021 festoon bulb for the same interior door position.
The 194 and DE3021 are not interchangeable, as they differ in both physical form factor and socket type, meaning a wedge socket will not accept a festoon bulb and vice versa.
Both bulb types conform to ANSI standards applicable in the United States and Canada, indicating consistent electrical and physical tolerances within those markets.
The T10 wedge form factor of the 194 bulb is among the most widely used miniature bulb types in automotive interior lighting applications.