BMW 340i Turn Signal Bulb Size
The BMW 340i front turn signal bulb uses 3357NA and 3457NA sizes for the replacement bulb specifications. The replacement chart covers 2016 through 2018 vehicle 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.
Front Turn Signal
| Years | Bulb Size |
|---|---|
| 2018 | 3357NA (With Halogen Capsule Headlamps) |
| 2017 | 3457NA (With Halogen Capsule Headlamps) |
| 2016 | 3357NA (With Halogen Capsule Headlamps) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W. | 3357NA |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA |