The Toyota Highlander parking light utilizes 7444NA, 7443NA, 3457NA, 3357NA, and P21/5W bulb sizes depending on the specific version of the vehicle. Available information covers a span of time starting from 2001 through 2023.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7444NA is the most frequently specified bulb across the Toyota Highlander front parking light positions, covering the 2017-2024 model years as well as 2014-2016.
The 7444NA is an ANSI-standard dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W high filament and 5W low filament. Its natural amber glass produces the amber color required for parking light applications without the use of a colored lens or coating.
The 3457NA shares the same ANSI-standard natural amber glass construction and dual-filament design as the 7444NA but uses the larger T25 wedge form factor and carries higher wattage ratings of 27W and 7W. It is specified for the 2011-2013 model years.
Because the 7444NA and 3457NA differ in physical size and wattage, they are not interchangeable with each other despite sharing the same natural amber glass finish and dual-filament configuration.
The P21/5W follows the ECE standard rather than the ANSI standard used by the 7444NA and 3457NA. It uses a BAY15d bayonet base rather than a wedge base, making it physically incompatible with sockets designed for T20 or T25 wedge bulbs.
The P21/5W is specified for the Toyota Highlander (2001-2005) front parking light position and carries the same 12V, 21W/5W electrical rating as the 7444NA, though the two bulbs use entirely different base types.
The dual-filament design present in all three bulb types allows a single bulb to serve two distinct brightness levels, which is typical for positions that function as both a parking light and a turn signal or brake light indicator.
The shift from P21/5W to ANSI-standard wedge bulbs across the Highlander's production history reflects a change in the base type standard used, from the BAY15d bayonet format to the wedge-style T-series format.