The Toyota Prius dome light requires a DE3175 bulb size for proper installation within the interior overhead lighting fixture. Available information covers the specific range from 2001 to 2019.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Prius dome light uses the DE3175 bulb across the 2001-2019 model years, making it the dominant fitment type in these specifications.
The DE3175 is an ANSI-standard festoon bulb recognized in both the United States and Canada, operating at 12 volts with a 31mm length and end-cap contacts that seat into spring-loaded holders at each end of the lamp housing.
The 2022 Prius front dome light uses the 12961, a Philips-designated miniature wedge bulb built on the T10 form factor with a W2.1x9.5d base, rated at 12 volts and 5 watts.
The wedge base of the 12961 is physically and electrically incompatible with the end-cap socket designed for the DE3175 festoon, meaning the two types are not interchangeable despite both operating at 12 volts.
For the 2017-2018 Prius front dome light, the specifications designate the DE3175 specifically for the center position, indicating the housing contains a defined socket location rather than a single undivided lamp cavity.