The Toyota Previa back up light utilizes 1156 and P21W bulb sizes according to the provided specifications. Available information covers the time 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 back up light uses the 1156 bulb across all listed model years, spanning 1991-1997.
The 1156 is a single-filament bulb rated at 12 volts and 21 watts, built to ANSI standards for the US and Canadian markets.
It uses a BA15s bayonet base, which is a single-contact base with a 15mm collar and one locating pin, distinguishing it from the dual-pin BA15d variant.
The single-filament design of the 1156 means it serves a dedicated switching function, in this case reverse lighting, rather than a dual-intensity role such as combined stop and tail applications.
The Toyota Previa also carries a separate Outer Back Up Light position for 1995-1997, which shares the same 1156 bulb size as the standard back up light position.
The 1997 Outer Back Up Light fitment is noted as applicable only to vehicles produced up to July 1997, indicating a mid-year specification boundary for that position.