Toyota Solara Courtesy Bulb Size

The Toyota Solara courtesy light uses 194 and DE3175 bulb sizes for the interior lighting components. Data for the specific bulbs covers the period from 1999 through 2003.

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
2001-2003	194
2000	DE3175
1999	194

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.	DE3175

Other Locations

Additional Notes

The 194 bulb is the most frequently specified courtesy bulb size across the Toyota Solara's listed model years, appearing in 2001-2003 and 1999.
The 194 is a T10 miniature wedge-base bulb rated at 12 volts and 3.78 watts, conforming to ANSI standards for the US and Canadian markets.
The T10 wedge base design uses a plastic wedge with embedded wire contacts rather than a separate metal base, which is how it secures into its socket.
The 2000 Toyota Solara uses a DE3175 festoon bulb for the courtesy application, making it the only model year in this specification set to differ from the 194 fitment.
The DE3175 is a 31mm festoon bulb rated at 12 volts, using end-cap contacts at each end of the cylindrical housing to make electrical connection.
The 194 and DE3175 are not interchangeable due to their fundamentally different base types: one uses a wedge socket and the other uses a festoon-style holder with opposing end contacts.