The INFINITI G35 front and rear turn signal bulbs both utilize a 7440 bulb size for proper operation. The replacement chart covers 2003 through 2008 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 7440 bulb is the sole turn signal bulb type listed for the INFINITI G35 across both front and rear positions.
The 7440 is a single-filament wedge bulb built to the T20 form factor, rated at 12 volts and 21 watts.
As a single-filament design, the 7440 serves one lighting function per socket, which distinguishes it from dual-filament variants such as the 7443 that occupy the same T20 wedge base.
The 7440 conforms to ANSI standards applicable in the United States and Canada, meaning it meets the regulatory requirements for those markets.
The front and rear turn signal positions on the G35 share the same 7440 specification across the 2003-2005 and 2008 model years listed.
Because the 7440 and 7443 share the same T20 wedge base, a 7443 can physically seat in a 7440 socket, though the reverse is not always possible due to pin configuration differences on some socket designs.
The 21-watt rating of the 7440 is relevant to turn signal hyperflash behavior, as LED replacements drawing significantly less wattage can trigger a vehicle's flasher relay to cycle at an abnormally fast rate without a load resistor or relay replacement.