Aston Martin DB9 Turn Signal Bulb Size

The Aston Martin DB9 front turn signal uses a 3157NA bulb size. The replacement chart covers 2005 to 2012 vehicle production years with corresponding bulb specifications.

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
2005-2012	3157NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	3157NA

Other Locations

Additional Notes

The 3157NA is the sole front turn signal bulb type listed for the Aston Martin DB9 across the 2005-2012 model years.
The 3157NA is an ANSI-standardized bulb, meaning it conforms to a defined North American specification used in the United States and Canada.
The bulb follows a dual-filament design, operating at 27 watts on the high-intensity filament and 7 watts on the low-intensity filament, which allows a single bulb to serve two distinct lighting functions.
The T25 designation refers to the wedge-style base of the bulb, a form factor that seats directly into a socket without requiring a separate bayonet or screw fitting.
The natural amber glass of the 3157NA produces its amber signal color through the glass itself rather than through a colored lens or a coating applied to a clear bulb.
The bulb operates on a 12-volt electrical system, consistent with the standard automotive voltage found in passenger vehicles.
The "NA" suffix in the 3157NA designation distinguishes it from the standard 3157, which uses clear glass. Substituting a clear 3157 in place of the 3157NA would alter the color output of the front turn signal unless the housing lens provides the amber tint independently.