Originally Posted by BobsM3Coupe
BMW calls these fasteners expanding rivets.
If anyone needs new ones, the part # is: 51498237075. They cost about $0.50 each.
i broke one of mine a while back and went to the dealership to get a new one. my local dealership ripped me off to the tune of $2/rivet. of course i wants going to go home empty handed so i just bought it there but its surprising what kind of margin they can make on small parts like these.