Rivet Gun Set with 3 Sizes Nylon Blind Rivets, 30 Pieces, Hand Riveter Suitable for Automotive and More

If you're using the bmw plastic rivets, they look and behave just like a metal rivet. The difference is they are made to deform with the plastic they are bonding exactly like the plastic they're bonding where metal would be more rigid and cause a deformation of the plastic. Also metal heats and cools at a different rate and that would also cause problems. Push pin connectors won't work well because the aren't as secure. Here's a link to the type of rivets that came with the bmw oe bumper and the tool used to install them - plastic rivet tool