If you get 'Front Foglight Failure' coming up then it's likely a bulb has blown, but I believe it is a common problem on the F10 showing this error but both front fog lamps are still working, or a light not working but the bulb is not blown. It should be an easy fix.
REPLACING THE BULB / CHECKING FAULT:
1. Using an 8mm hex-socket remove four of the screws holding the front side of the corresponding wheel-arch liner - two from the bottom edge and the other two that run up the outer edge of the wheel-arch. This should be enough to peel the arch-liner back and see the back of the fog-light.
2. Remove the wiring-connector by pressing the clip and sliding it upwards.
3. Remove the bulb-holder in the back of the fog-lamp by giving it a quarter-turn anti-clockwise and it should pull out easily.
If the bulb is blown then it can be removed from the plastic holder and replaced.
IF IT'S NOT THE BULB:
The worst case scenario is a fault with the lighting module or wiring to it, see this post - https://www.beemerlab.org/2019/04/f10-halogen-headlight-module-issues.html, but it is far more likely to just be a loose wiring-connector behind the bumper.
Firstly, the wiring-connector to the fog-lamp itself connects from above, so it is possible moisture can fid its way in and corrode the terminals, which can be easily cleaned up with some emery-cloth and a small screwdriver/awl. It is also feasible that road dirt / debris can drop into the plug as it is removed, making it not seat correctly when it is replaced, so rule these out first.
Secondly, there is another wiring connector higher up in the front bumper behind the bottom of the headlight unit. It is hard to spot, as wires seem to run to the fog-lamps from both sides of the car and also link to the headlights, so it will appear as if the wiring to the fogs are intact, when this plug becoming loose or not properly connected will stop the fog-lamp working and throw the error, but not affect the headlights. This can be caused when a headlight has been removed for bulb-replacement or work on the front of the car, so if this work has been done to the car recently then be sure to check this plug.
A car's fog lights are intended to help it be seen in conditions when visibility is less than 100m. Fog lights don't help you see further up the road in fog. Which lights do you use in fog? In fog or other low visibility conditions, you should turn on your main headlights. https://www.protuninglab.com
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