Toyota Previa Courtesy Bulb Size

The Toyota Previa courtesy light uses bulb size DE3175 or DE3021 depending on the specific version required for the vehicle. Data for the bulb sizes covers the range from 1994 to 1997.

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
1997	DE3175
1994-1996	DE3021

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3021

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Additional Notes

The Toyota Previa uses two distinct courtesy bulb sizes across its 1994-1997 model years: the DE3021 and the DE3175, both of which are festoon-type bulbs operating at 12 volts.
The DE3021 is specified for the 1994-1996 Previa, while the DE3175 applies exclusively to the 1997 model year, making the two bulbs non-interchangeable across all covered years despite their shared festoon format.
Both the DE3021 and DE3175 conform to ANSI standards recognized in the United States and Canada, meaning each bulb meets a defined set of dimensional and electrical performance criteria established for the North American market.
Festoon bulbs are cylindrical lamps that make electrical contact through metal caps at each end rather than through a base pin or wedge, which is the contact method referenced by the end-cap designation shared by both bulb types.
Both bulbs share a 31mm length, which refers to the physical span of the lamp body and determines whether the bulb seats correctly within the courtesy light housing.
The 12-volt rating on both bulbs corresponds to the standard operating voltage of a conventional automotive electrical system, confirming compatibility with the Previa's onboard power supply.
Although the DE3021 and DE3175 share the same length and voltage rating, they carry different ANSI designations, which indicates a difference in at least one other specification such as wattage or luminous output that affects fitment suitability by model year.