The Lexus GX470 brake light uses a 7443 bulb size for the rear lighting system on the vehicle. Data for the specific component covers the period from 2003 through 2009.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus GX470 uses the 7443 bulb across all documented model years, spanning 2003-2009, for both its brake and outer brake lighting positions.
The 7443 is an ANSI-standard bulb recognized in the United States and Canada, classified under the T20 wedge form factor.
As a dual-filament bulb, the 7443 operates two independent filaments within a single housing, rated at 21W for the high-intensity filament and 5W for the low-intensity filament, running on a 12V electrical system.
The dual-filament design allows one bulb to serve both a brighter stop-light function and a dimmer tail-light function simultaneously, which is a common arrangement in combined brake and tail-light assemblies.
The T20 wedge base does not use a metal pin or bayonet fitting; instead, the bulb is held in place by the tension of the socket walls against the glass envelope's wedge-shaped base.
The outer brake position on the Lexus GX470 (2009) carries a production cutoff notation of "To 08/2009," indicating the specification applies to units manufactured up to that date within the model year.
The 2003 outer brake position carries a production start notation of "From 11/2002," reflecting that GX470 production for the 2003 model year began in November 2002.
Because the 7443 is an ANSI-standardized type, it is interchangeable across any vehicle application that specifies the same standard, provided the socket and voltage requirements match.