The Toyota Previa brake component utilizes a 1157 bulb size for the lighting system. Data for the specified vehicle covers the range from 1991 through 1997.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Previa uses the 1157 bulb as its primary brake light across all listed model years from 1991-1997, making it the most consistently specified bulb in these fitment records.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W output and a BAY15d bayonet base, meaning its two filaments serve separate functions at different wattages within a single housing.
The Center High Mount Stop Light on the Toyota Previa alternates between two different bulb types depending on the model year, with the 1156 specified for 1991-1994 and 1996, and the 921 specified for 1995 and 1997.
The 1156 and 921 are not interchangeable despite both being single-filament bulbs rated at 12V. The 1156 uses a BA15s bayonet base at 21W, while the 921 is a T15 wedge-type bulb rated at 16W, representing a different base type and lower wattage output.
Substituting a 1156 for a 921, or vice versa, in the Center High Mount Stop Light would be incorrect, as the base configurations are physically incompatible and the wattage ratings differ.
The 1157 also carries a dual-filament design with a BAY15d base, which is a indexed bayonet fitting. This base type differs from the BA15s single-contact base used by the 1156, making the two bulbs non-interchangeable despite sharing a similar bayonet-style mount.
The Outer Brake sub-part on the 1997 Toyota Previa specifies the 1157 bulb with a production cutoff noted as "To 07/1997," indicating this fitment applies only to vehicles produced up to that date within the model year.