The Lexus ES350 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 range from 2007 to 2012.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus ES350 uses the 7443 bulb for brake lighting across the 2007-2012 model years, covering both the general brake position and the outer brake position.
The 7443 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard used in the United States and Canada.
The 7443 belongs to the T20 wedge bulb family, a form factor defined by its wedge-shaped base, which locks into the socket without a separate bayonet or screw mechanism.
As a dual-filament bulb, the 7443 operates two independent filaments within a single envelope, allowing it to serve both a high-intensity brake function and a lower-intensity running light function from one unit.
The 7443 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
The two filaments in the 7443 are rated at 21 watts and 5 watts respectively, with the 21-watt filament corresponding to the brighter brake signal output and the 5-watt filament to the dimmer running light output.
The outer brake position on the Lexus ES350 (2007-2012) shares the same 7443 specification as the general brake position, indicating a uniform bulb type across both brake lighting locations.
The 7443 is sometimes referenced alongside the 7440, a single-filament variant in the same T20 family. The two are not interchangeable in dual-filament applications, as the 7440 lacks the second filament contact required for the running light function.