The Subaru Baja brake light requires a 7443 bulb size for proper installation and function. Data for 2003 through 2004 provides the specific information for the lighting components.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Subaru Baja uses two distinct bulb types across its brake lighting system for the 2003-2004 model years: the 7443 for the standard brake lights and the 912 for the center high mount stop light.
The 7443 is a dual-filament wedge bulb following the T20 form factor, rated at 12V with a wattage split of 21W/5W. The dual-filament design allows a single bulb to serve two functions, typically a lower-intensity running or parking mode alongside a higher-intensity brake mode.
The 912 is a single-filament T15 wedge bulb rated at 12V and 12W. Its lower wattage reflects its dedicated single-function role in the center high mount stop light.
Both the 7443 and 912 conform to ANSI standards applicable in the United States and Canada.
The 912 is a variant of the 921 bulb. While the two share a physical form factor, they are not identical in output, and substituting one for the other without confirming the wattage rating may affect performance in the Subaru Baja (2003-2004).
The T20 wedge base of the 7443 and the T15 wedge base of the 912 are physically incompatible with each other, meaning the two bulb types are not interchangeable within the Baja's brake lighting system.