Lexus RX350h Turn Signal Bulb Size

The Lexus RX350h uses a 7440NA bulb size for turn signal applications. The replacement chart covers 2023 to 2024 vehicle production years with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2023-2024	7440NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T20), natural amber glass. 12V, 21W.	7440NA

Additional Notes

The 7440NA is a single-filament wedge bulb built to the T20 form factor, operating at 12 volts and 21 watts. Its natural amber glass produces the orange-tinted output required for turn signal applications without relying on a colored lens or coated housing.
The "NA" suffix in the 7440NA designation indicates natural amber, distinguishing it from the clear-glass 7440, which shares the same electrical and physical specifications but produces white light. These two variants are not interchangeable in applications where the amber color is provided by the bulb itself rather than the fixture.
The T20 wedge base is a push-in connector type with no separate metal base pins, meaning the bulb is held and electrically contacted through the wedge-shaped plastic base alone. This design is common in parking, tail, and signal positions across a wide range of vehicles.
The 7440NA is classified under ANSI standards applicable in the United States and Canada, confirming its compliance with North American automotive lighting regulations for turn signal output and color.
The Lexus RX350h uses the 7440NA for its turn signal bulb positions across the 2023-2024 model years, indicating a consistent single-filament, natural amber specification for that function during this production period.