BMW 340i Back Up Light Bulb Size
The BMW 340i back up light requires a bulb with the specific H21W size for proper installation and function. Available data for the bulb covers the range from 2016 to 2018.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Bulb Size by Year Range
| Years | Bulb Type | Shop |
|---|---|---|
| 2016-2018 | H21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BAY9s base. 12V, 21W. | H21W | Check Price |