Lexus NX300h front and rear turn signal bulbs use 7440NA size for replacement. The chart covers bulb specifications across 2015 to 2021 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7440NA is the sole bulb type specified across all front and rear turn signal positions in the Lexus NX300h turn signal data.
The 7440NA is a single-filament wedge bulb in the T20 form factor, rated at 12 volts and 21 watts, and meets ANSI standards for the US and Canadian markets.
The natural amber glass of the 7440NA produces a colored output directly from the envelope rather than relying on a clear bulb behind an amber lens, which is a distinction relevant to lens compatibility.
The front turn signal of the Lexus NX300h uses the 7440NA across all model years from 2015 to 2021.
For the 2015-2018 model years, the front turn signal fitment of the 7440NA is conditional on the presence of Halogen Capsule Headlamps.
For the 2019-2020 model years, the front turn signal fitment of the 7440NA is conditional on the presence of Bi-LED Headlamps, indicating a headlamp package change between the 2018 and 2019 model years.
The front turn signal specification for the 2021 model year carries no headlamp package condition, unlike all prior years in the dataset.
The rear turn signal specifications cover the 2015-2018 model years only, with the 7440NA specified unconditionally across all four of those years.
Because the 7440NA is a single-filament bulb, it is not interchangeable with dual-filament T20 bulbs such as the 7443, even though both share the same wedge base family.