Lexus NX300 Turn Signal Bulb Size

The Lexus NX300 front turn signal uses a 7440NA bulb size for replacement. The chart covers 2018 to 2021 model years with corresponding bulb size data.

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

Front Turn Signal

Years	Bulb Size
2021	7440NA
2018-2020	7440NA (With Bi-LED Headlamps)

Bulb Specifications

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

Other Locations

Additional Notes

The 7440NA is the sole front turn signal bulb type listed across all model years in these specifications, covering 2018-2021.
The 7440NA is a single-filament wedge bulb built to the T20 form factor, operating at 12 volts and rated at 21 watts.
The T20 wedge base is a push-in connector type, meaning the bulb seats directly into a socket without a separate bayonet or screw mechanism.
The "NA" suffix in the 7440NA designation indicates natural amber glass, which produces the amber turn signal color through the glass itself rather than through a colored lens or housing.
The 7440NA conforms to ANSI standards as applicable in the United States and Canada, distinguishing it from ECE-standard equivalents used in other markets.
For the 2018-2020 Lexus NX300, the 7440NA fitment is specific to vehicles equipped with Bi-LED headlamps, indicating a conditional trim or package dependency for those years.
The 2021 model year carries no such conditional notation, meaning the 7440NA applies without a stated headlamp package restriction for that year.
A standard 7440 bulb uses clear glass and relies on an amber-colored lens for turn signal output, whereas the 7440NA produces amber output independently of the lens, making the two bulbs non-equivalent in applications where lens color differs.