INFINITI Q70L Turn Signal Bulb Size

The INFINITI Q70L rear turn signal uses a 7440 bulb size for replacement. The chart covers 2015 to 2019 production 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.

Rear Turn Signal

Years	Bulb Size
2015-2019	7440

Bulb Specifications

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

Other Locations

Additional Notes

The INFINITI Q70L uses the 7440 bulb for the rear turn signal across all listed model years, spanning 2015-2019.
The 7440 is a T20 wedge-base bulb, meaning it uses a plastic wedge at its base rather than a metal pin or bayonet fitting to secure it within the socket.
The 7440 operates at 12 volts and 21 watts, which is the standard electrical rating for automotive turn signal applications in conventional incandescent bulbs.
As a single-filament bulb, the 7440 is dedicated to one function only. This distinguishes it from dual-filament variants in the T20 family, such as the 7443, which carries two filaments for combined stop and tail light duties.
The 7440 and 7443 share the same T20 wedge base form, but the 7443 has a second filament and a slightly different internal pin configuration. Substituting a 7443 in place of a 7440 socket may cause fitment or electrical issues depending on socket design.
The 7440 designation follows ANSI standardization, which applies to the United States and Canada, indicating the bulb conforms to a defined set of electrical and physical specifications recognized across those markets.