The Nissan 350Z uses 7440NA bulb size for both front and rear turn signal applications. The replacement chart covers 2003 to 2005 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 7440NA is the sole bulb type specified for the Nissan 350Z across all listed turn signal positions and model years.
The 7440NA follows the ANSI standard, meaning it conforms to the electrical and dimensional specifications recognized in the United States and Canada.
As a single-filament bulb, the 7440NA serves one dedicated function per socket, distinguishing it from dual-filament types that handle two functions such as braking and signaling simultaneously.
The T20 wedge base of the 7440NA is a push-in style connector with no separate metal pins, relying on the glass envelope itself to make contact within the socket.
The natural amber glass of the 7440NA produces its amber signal color directly through the bulb envelope rather than through a colored lens, a distinction relevant when the housing lens is clear.
The 7440NA operates at 12 volts and 21 watts, values consistent with standard automotive electrical systems and typical turn signal power draw.
The Nissan 350Z (2003-2005) uses the same 7440NA specification for both the front and rear turn signal positions, indicating socket compatibility between the two locations on this vehicle.
The 7440NA shares its T20 wedge base form with the 7440 bulb, though the two differ in glass color; substituting a clear 7440 for the 7440NA in a clear-lens housing would alter the emitted signal color.