The Lexus LS460 front turn signal uses a 7440NA bulb size, while rear turn signal applications accommodate 7443, 7440, or 921 bulb sizes depending on location. The replacement chart covers 2007 through 2013 model 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.
The Lexus LS460 front turn signal position uses the 7440NA bulb across all model years covered in the specifications, from 2007-2013.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W. Its distinguishing feature is a natural amber glass envelope, which produces the amber signal color without relying on a colored lens or housing.
The rear turn signal position of the Lexus LS460 does not use a single bulb type across all model years. Three different bulbs are specified depending on the year.
The 921 bulb is specified for the rear turn signal on the 2007-2008 model years. It is a T15 wedge bulb rated at 12V and 16W, which is a physically smaller and lower-wattage type than the T20 bulbs used in later years.
The rear turn signal shifted to the 7440 bulb for the 2009-2012 model years. The 7440 is a single-filament T20 wedge bulb rated at 12V and 21W, representing a higher wattage output than the 921 it replaced.
The 2013 model year rear turn signal uses the 7443, which differs from the 7440 in that it carries a dual filament rated at 21W and 5W. This allows a single bulb to serve two lighting functions within the same socket.
The 7440 and 7440NA share the same T20 wedge base, voltage, and wattage ratings. The physical distinction is the amber glass coating on the 7440NA. Substituting one for the other in a housing not designed for it may affect the output color.
The 7443 and 7440 both use the T20 wedge form factor, but their bases are not interchangeable in all sockets. The 7443 has an offset pin configuration to accommodate its dual filament, while the 7440 uses a single-filament base arrangement.