Toyota Highlander Tail Light Bulb Size

Additional Notes

• The 7443 is the most widely used bulb type across the Toyota Highlander tail light specifications, appearing in the outer tail light position across model years spanning 2001-2017, with certain date-of-production qualifiers applying to the 2001, 2010, and 2017 entries.
• The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W/5W output, meaning its two filaments serve separate functions, typically stop/tail or turn/tail combinations within a single housing.
• The 168 is a single-filament T10 miniature wedge bulb rated at 12V and 4.9W, a significantly lower wattage than the 7443, reflecting its role in a lower-intensity inner tail light position.
• Both the 168 and 7443 conform to ANSI standards applicable in the United States and Canada, indicating standardized base and envelope dimensions that govern physical fitment.
• The inner tail light position on the Toyota Highlander uses the 168 bulb for model years 2014-2017, with the 2014 entry carrying a "From 12/2013" qualifier and the 2017 entry carrying a "To 11/2016" qualifier, meaning fitment is tied to production date rather than model year alone.
• The outer tail light for the 2017 Toyota Highlander specifies the 7443 with a "To 11/2016" production cutoff, and the 2010 entry carries a "To 08/2010" cutoff, indicating mid-year production changes that affect which bulb applies to a given vehicle.
• The 2001 outer tail light entry specifies the 7443 with a "From 11/2000" qualifier, reflecting that the Highlander's production for that model year began partway through the calendar year 2000.
• Because the T10 and T20 wedge bases are physically different sizes, the 168 and 7443 are not interchangeable, and substituting one for the other in a given socket is not supported by these specifications.