The Toyota Sequoia back up light utilizes a 921 bulb size for illumination purposes across all listed vehicle versions. Provided information covers a span of time starting from 2001 through 2022.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 921 bulb is an ANSI-standard single-filament wedge type with a T15 base, rated at 12 volts and 16 watts. It serves as the back up light bulb across all listed model years of the Toyota Sequoia from 2001-2022.
The 3057 bulb is an ANSI-standard dual-filament wedge type with a T25 base, rated at 12 volts with a 27-watt primary filament and a 7-watt secondary filament. It is specified for the inner back up light position on certain model years.
The T15 and T25 designations refer to the tubular bulb body width, measured in eighths of an inch. The two bulb types are physically different sizes and are not interchangeable with each other despite both using wedge-style bases.
The Toyota Sequoia inner back up light position uses the 3057 bulb for the 2008-2015 model years, with the 2008 fitment applying to vehicles produced from November 2007 onward.
For the 2016-2019 inner back up light position, the 921 bulb applies specifically to vehicles equipped with the High Efficiency Twin Cam engine, while the 3057 fitment covers the 2010-2016 range under standard configurations.
The outer back up light position on the Sequoia uses the 921 bulb for the 2001-2007 model years, with the 2001 fitment applying to vehicles produced from September 2000 onward.
Both the 921 and 3057 bulbs conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications recognized across those markets.
The dual-filament nature of the 3057 bulb means it carries two independent circuits within a single housing, a characteristic that distinguishes its internal construction from the single-filament 921 despite both being wedge-base types.