The Toyota Sienna back up light utilizes a 921 bulb size for illumination purposes within the rear lighting assembly. Provided information covers a span of time starting from 1998 through 2024.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Sienna uses the 921 bulb for its back up light across all listed model years from 1998-2024, making it the sole bulb type specified for this application throughout the entire production range covered by these specifications.
The 921 is a T15 wedge-base bulb, meaning it uses a tapering plastic base that presses directly into a socket without requiring a separate locking mechanism or bayonet pins.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems and typical of single-filament reverse light applications.
The 921 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning units sold under this designation conform to the same dimensional and electrical specifications regardless of the supplier.
The Toyota Sienna (2000-2018) carries specifications for both an inner and an outer back up light position, indicating a multi-lamp reverse light assembly during those model years rather than a single lamp per side.
The 2013 inner back up light specification includes a production cutoff of August 2013, and the 2007 inner back up light specification applies only from December 2006 onward, meaning mid-year assembly changes affected which lamp positions were present in those specific vehicles.
Because both the standard back up light and the inner back up light positions share the 921 bulb across all listed years, no cross-position substitution conflict exists within this vehicle's reverse lighting system.
The outer back up light sub-part is listed only for 1998-1999, while the inner back up light sub-part covers 2000-2018, reflecting a structural distinction in how the reverse lighting assembly was categorized across different production periods.