Toyota Previa headlight bulbs utilize 9003 and 9004 sizes for both high and low beam applications. The replacement chart covers 1991 through 1997 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Previa uses two distinct bulb types across its production run: the 9003 and the 9004, both of which are ANSI-standard dual-filament halogen bulbs rated at 12 volts.
The 9003 bulb carries a P43t base and operates at 60W on the high beam filament and 55W on the low beam filament.
The 9004 bulb carries a P29t base and operates at 65W on the high beam filament and 45W on the low beam filament, giving it a notably asymmetric power distribution compared to the 9003.
Because the 9003 and 9004 use different base types, the P43t and P29t are not physically interchangeable, meaning a bulb from one group cannot be substituted into a socket designed for the other.
On the Toyota Previa, both the high beam and low beam positions use the same bulb type for a given model year, as the 9003 and 9004 are each dual-filament designs that serve both functions within a single housing.
The 1994-1997 Previa uses the 9003 bulb in both headlight positions, while the 1991-1993 Previa uses the 9004 in both positions.
The transition from the 9004 to the 9003 occurred between the 1993 and 1994 model years, representing a change in both base type and wattage configuration across the headlight system.