Scion FR-S front turn signal bulbs use 7443NA size while rear turn signal bulbs use 7440NA size. Replacement chart data covers 2013 to 2016 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Scion FR-S uses the 7443NA for front turn signals and the 7440NA for rear turn signals across all model years from 2013-2016.
Both the 7443NA and 7440NA are T20 wedge-base bulbs operating on a 12-volt system, conforming to ANSI standards recognized in the United States and Canada.
The natural amber glass construction of both bulb types produces the amber turn signal color directly from the glass envelope rather than from a clear bulb paired with an amber lens.
The 7443NA is a dual-filament bulb rated at 21W and 5W, meaning it carries two separate filaments within a single housing, allowing it to serve both a high-intensity and a low-intensity function.
The 7440NA is a single-filament bulb rated at 21W, dedicated solely to the full-brightness turn signal function without a secondary low-power filament.
Despite sharing the same T20 wedge base and physical form factor, the 7443NA and 7440NA are not interchangeable. Installing a 7440NA in a front socket designed for the 7443NA would result in the loss of the secondary filament circuit.