Land Rover Range Rover Sport Turn Signal Bulb Size
The Land Rover Range Rover Sport turn signal requires a 3457NA bulb size for the front or rear lighting components. Data for the specific bulb requirements covers the range from 2006 to 2008.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 3357NA and 3457NA bulbs share the T25 wedge form factor and both operate at 12V, yet they serve different functions due to their filament configuration. The 3357NA is a single-filament bulb rated at 27W, while the 3457NA is a dual-filament bulb rated at 27W and 7W, allowing it to handle two lighting functions simultaneously.
The "NA" suffix on the 3357NA, 3457NA, and 12274NA designations indicates natural amber glass, meaning the bulb envelope itself is tinted amber rather than clear. This coloring produces the required amber turn signal output without relying solely on a colored lens.
The 3357NA and 3457NA are classified under the ANSI standard, which governs bulb specifications in the United States and Canada. The P21W, by contrast, follows the ECE standard used in Europe and other international markets.
The P21W uses a BA15s bayonet base, a single-contact fitting that is physically distinct from the wedge base of the T25 bulbs. These two base types are not interchangeable, and substituting one for the other is not possible without a socket adapter.
For the Land Rover Range Rover Sport, the front turn signal shifted from the 3457NA in 2006 to the 3357NA for 2007-2009. This represents a change from a dual-filament to a single-filament bulb in the front position.
The 12274NA is listed as an OEM part number rather than an ANSI or ECE standard designation. It is a 12V natural amber bulb used in the front turn signal position for the 2010-2013 model years.
The rear turn signal for 2006-2009 models lists both the P21W and the 3457NA. Because the P21W follows ECE standards and the 3457NA follows ANSI standards, these two bulbs likely correspond to different regional variants of the vehicle rather than being interchangeable options for the same socket.
The 3457NA appears in both the front turn signal position for 2006 and the rear turn signal position for 2006-2008. Despite occupying different locations on the vehicle, both applications use the same dual-filament T25 wedge bulb specification.