I have 3 of those too, but on the rear quarter panel. They're 3 smaller ones though that seem to have been made by the guy doing my suspension trying to get leverage to pull the rear springs out.
Mine are above my gas cap, above the body line that goes to the front side marker light. If you look at my sig, it looks like a ball of light like the sun, but it's actually one of the bigger ones catching light. Would that be hard to fix? Seems like it's in a bad spot.
2015 M235i 6MT