The Lexus ES330 brake bulb utilizes a 7443 size for outer brake applications and a 7440 size for the center high mount stop light, with the inner brake bulb also requiring a 7443 size. The replacement chart covers vehicle production spanning 2004 to 2006, detailing bulb specifications across these model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus ES330 uses two bulb types across its brake lighting system: the 7443 and the 7440, both of which follow ANSI standards applicable to the US and Canadian markets.
Both the 7443 and 7440 belong to the T20 wedge bulb family and share the same 12V operating voltage, making them physically similar in form factor despite differing in filament configuration.
The 7443 is a dual-filament bulb rated at 21W and 5W, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary function such as running or tail light operation.
The 7440 is a single-filament bulb rated at 21W, dedicated solely to its assigned lighting function without a secondary filament circuit.
Because the 7443 and 7440 share the T20 wedge base, they may physically fit the same socket, but substituting one for the other would result in incorrect electrical behavior due to the filament count difference.
The 7443 is specified for the brake light position across the 2004-2006 Lexus ES330 model years.
The 7440 is specified for the Center High Mount Stop Light position across the 2004-2006 ES330 model years.
The Outer Brake position on the 2006 Lexus ES330 carries a production date qualifier, specifying the 7443 only for vehicles produced up to March 2006.