Lexus LX570 Turn Signal Bulb Size

The Lexus LX570 front turn signal bulb accommodates 7444NA, 7443NA, or 3457NA sizes, while the rear turn signal bulb uses 7440NA or 7440 size. The replacement chart contains vehicle production years and bulb size specifications spanning 2008 to 2016.

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
2016	7444NA (To 09/2015)
2013-2015	7443NA
2011	3457NA
2010	3357NA
2009	3457NA
2008	3357NA

Rear Turn Signal

Years	Bulb Size
2016	7440NA (To 09/2015)
2013-2015	7440NA
2008-2011	7440

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.	7444NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.	7443NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	3457NA
ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W.	3357NA
ANSI standard (US & Canada). Single-filament wedge bulb (T20), natural amber glass. 12V, 21W.	7440NA
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440

Other Locations

Additional Notes

The Lexus LX570 front turn signal uses T20 wedge bulbs for the 2013-2016 model years and T25 wedge bulbs for the 2008-2011 model years, reflecting a socket size difference between these two generations.
The 7443NA and 7444NA bulbs specified for the 2013-2016 LX570 front turn signal are both dual-filament T20 wedge types rated at 12V with a 21W/5W output, meaning one filament handles the turn signal function and the other serves a secondary lighting role such as parking or daytime running light.
The 7444NA listed for the 2016 LX570 front turn signal carries a production cutoff notation of "To 09/2015," indicating this specification applies to vehicles produced before that date within the 2016 model year.
The 3457NA used in the 2009 and 2011 LX570 front turn signal is a dual-filament T25 wedge bulb rated at 12V, 27W/7W, while the 3357NA used in 2008 and 2010 is a single-filament T25 wedge rated at 12V, 27W. These two bulbs share the same T25 form factor but differ in filament count.
The "NA" suffix present on bulbs such as the 7443NA, 3457NA, and 7440NA denotes natural amber glass, meaning the amber color is built into the glass envelope rather than achieved through a colored lens or coating.
The rear turn signal of the Lexus LX570 uses a T20 single-filament wedge bulb across all listed model years from 2008 through 2016, with the 7440NA specified for 2013-2016 and the standard 7440 specified for 2008-2011.
The 7440NA and 7440 are functionally similar single-filament T20 bulbs rated at 12V, 21W, but the 7440NA incorporates natural amber glass while the 7440 does not, making them visually distinct in applications where the lens itself is clear.
All bulb types listed across both front and rear turn signal positions conform to ANSI standards applicable to the US and Canadian markets.
The front turn signal positions on the LX570 show greater variation in bulb type across model years than the rear positions, with four distinct bulb sizes appearing in the front compared to two in the rear.
The 3357NA used in the 2008 and 2010 LX570 front turn signal is the only single-filament T25 bulb among the front turn signal specifications, as the other T25 entry, the 3457NA, carries a dual-filament configuration.