What's the bmw e39 fog light bulb size?

The BMW e39 fog light bulb size is H7. Being able to see at night is important for driving down the road. Your lights need to be working or You may get into a wreck. Some issues will show up at some point. A faulty wire could come about. Lights may burn out prematurely. Corrosion is very nasty to deal with. Blown fuse can come about. A failed relay equals a failed light source. These issues need to be dealt with quickly. The light bulbs will stop working eventually. If it becomes dull, You will have to replace them. They aren't that expensive, so they won't hurt Your bank account.