The Scion tC brake light utilizes a 7443 bulb size for the specific lighting component located at the rear of the vehicle. Data for the bulb specifications covers the period from 2005 through 2013.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7443 is the sole brake bulb size specified for the Scion tC across all listed model years, covering both general brake and outer brake positions.
The 7443 bulb follows the ANSI standard recognized in the United States and Canada, classifying it as a regionally standardized automotive bulb type.
As a dual-filament bulb, the 7443 operates at two wattage levels: 21W for the high-intensity filament and 5W for the low-intensity filament, which allows it to serve both braking and running light functions within a single unit.
The 7443 uses a T20 wedge base, a base style that requires no locking tabs or bayonet pins and is retained by the socket through friction alone.
The bulb operates on a 12V electrical system, consistent with standard 12-volt automotive architecture.
For the Scion tC, the general brake position uses the 7443 across the 2005-2013 model years without interruption.
The outer brake position on the 2013 tC specifies the 7443 only through May 2013, indicating a mid-year production change for that specific position.
The 7443 and 7440 share the same T20 wedge base form factor, but the 7440 is a single-filament bulb; substituting one for the other in a dual-filament application would result in incorrect function.