Toyota Highlander Back Up Light Bulb Size

The Toyota Highlander back up light utilizes 921 and 7440 bulb sizes for the specific lighting components located at the rear of the vehicle. Data for the provided specifications covers the range from 2001 through 2024.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Back Up Light

Years	Bulb Size
2008-2024	921
2001-2005	7440

Inner Back Up Light

Years	Bulb Size
2015-2019	921
2014	921 (From 12/2013)

Outer Back Up Light

Years	Bulb Size
2011-2013	921
2010	921 (To 08/2010)
2009	921
2008	3057
2002-2005	7440
2001	7440 (From 11/2000)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3057

Other Locations

Additional Notes

The Toyota Highlander back up light uses the 921 bulb across the 2008-2024 model years, making it the most consistently specified bulb type in these fitment records. It is an ANSI-standard T15 wedge bulb rated at 12V and 16W.
The 7440 bulb is specified for the Toyota Highlander back up light across the 2001-2005 model years. It is an ANSI-standard single-filament T20 wedge bulb rated at 12V and 21W, drawing notably more wattage than the 921.
The 3057 bulb appears only in the Outer Back Up Light position for the 2008 model year. Unlike the 921 and 7440, the 3057 is a dual-filament T25 wedge bulb rated at 12V with a 27W/7W output, reflecting its two-filament construction.
The 921, 7440, and 3057 are all ANSI-standard wedge-base bulbs, but they belong to different size families (T15, T20, and T25 respectively) and are not interchangeable with one another despite sharing a wedge-base design.
The 2014 Toyota Highlander Inner Back Up Light carries a production date qualifier, specifying the 921 bulb only from 12/2013 onward. Vehicles produced before that date fall outside this fitment entry.
The 2010 Outer Back Up Light entry is limited to units produced through 08/2010, and the 2001 Outer Back Up Light entry applies only to vehicles produced from 11/2000 onward, indicating mid-cycle specification changes at both ends of that sub-part's range.
From the 2015-2019 model years, the Toyota Highlander carries separate Inner Back Up Light entries alongside the general back up light entries, both specifying the 921 bulb, which reflects a multi-position rear lighting configuration during that period.