The Lexus RX450hL front turn signal uses a 7444NA bulb size while the rear turn signal requires a 7440NA bulb size. The replacement bulb chart covers 2018 to 2021 model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus RX450hL uses two T20 wedge bulb types across its front and rear turn signal positions: the 7444NA for the front and the 7440NA for the rear.
Both the 7444NA and 7440NA are ANSI-standardized bulbs recognized in the United States and Canada, operating on a 12-volt electrical system.
The T20 designation refers to a wedge-base bulb form factor approximately 20mm in width, a common sizing standard in automotive lighting.
The 7444NA is a dual-filament bulb rated at 21W and 5W, meaning it serves two brightness levels within a single housing, typically supporting both turn signal and parking light functions simultaneously.
The 7440NA is a single-filament bulb rated at 21W, dedicated solely to the turn signal function at the rear without a secondary lower-wattage filament.
Both bulb types feature natural amber glass, which produces the amber turn signal color directly from the glass envelope rather than relying on a colored lens or housing to filter a clear bulb.
The front and rear turn signal positions on the Lexus RX450hL are not interchangeable, as the front requires the dual-filament 7444NA while the rear requires the single-filament 7440NA, despite both sharing the T20 form factor.
The 7444NA and 7440NA share the same T20 wedge base, which means physical fitment alone does not confirm correct application; filament count and wattage must also match the intended socket.
The front and rear turn signal bulb specifications for the Lexus RX450hL remain consistent across the 2018-2021 model years covered in the data.